From 48e695a2c89edad6e4880e7decfdb36d524f8279 Mon Sep 17 00:00:00 2001
From: Kyle Kelley <rgbkrk@gmail.com>
Date: Thu, 12 Oct 2023 15:32:38 -0700
Subject: [PATCH] feat(unstable): add Deno.jupyter.display API (#20819)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

This brings in [`display`](https://github.com/rgbkrk/display.js) as part
of the `Deno.jupyter` namespace.

Additionally these APIs were added:
- "Deno.jupyter.md"
- "Deno.jupyter.html"
- "Deno.jupyter.svg"
- "Deno.jupyter.format"

These APIs greatly extend capabilities of rendering output in Jupyter
notebooks.

---------

Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>
---
 cli/js/40_jupyter.js                          |  418 +-
 .../testdata/jupyter/integration_test.ipynb   | 3641 ++++++++++++++++-
 cli/tests/unit/jupyter_test.ts                |   72 +-
 cli/tools/jupyter/server.rs                   |  111 +-
 cli/tsc/dts/lib.deno.unstable.d.ts            |  124 +
 5 files changed, 4218 insertions(+), 148 deletions(-)

diff --git a/cli/js/40_jupyter.js b/cli/js/40_jupyter.js
index 5a30a6b8e85375..c4b27ad0b6298c 100644
--- a/cli/js/40_jupyter.js
+++ b/cli/js/40_jupyter.js
@@ -1,17 +1,429 @@
 // Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
 
+/*
+ * @module mod
+ * @description
+ * This module provides a `display()` function for the Jupyter Deno Kernel, similar to IPython's display.
+ * It can be used to asynchronously display objects in Jupyter frontends. There are also tagged template functions
+ * for quickly creating HTML, Markdown, and SVG views.
+ *
+ * @example
+ * Displaying objects asynchronously in Jupyter frontends.
+ * ```typescript
+ * import { display, html, md } from "https://deno.land/x/deno_jupyter/mod.ts";
+ *
+ * await display(html`<h1>Hello, world!</h1>`);
+ * await display(md`# Notebooks in TypeScript via Deno ![Deno logo](https://github.com/denoland.png?size=32)
+ *
+ * * TypeScript ${Deno.version.typescript}
+ * * V8 ${Deno.version.v8}
+ * * Deno ${Deno.version.deno}
+ *
+ * Interactive compute with Jupyter _built into Deno_!
+ * `);
+ * ```
+ *
+ * @example
+ * Emitting raw MIME bundles.
+ * ```typescript
+ * import { display } from "https://deno.land/x/deno_jupyter/mod.ts";
+ *
+ * await display({
+ *  "text/plain": "Hello, world!",
+ *  "text/html": "<h1>Hello, world!</h1>",
+ *  "text/markdown": "# Hello, world!",
+ * }, { raw: true });
+ * ```
+ */
+
 const core = globalThis.Deno.core;
+
 const internals = globalThis.__bootstrap.internals;
 
+const $display = Symbol.for("Jupyter.display");
+
+/** Escape copied from https://deno.land/std@0.192.0/html/entities.ts */
+const rawToEntityEntries = [
+  ["&", "&amp;"],
+  ["<", "&lt;"],
+  [">", "&gt;"],
+  ['"', "&quot;"],
+  ["'", "&#39;"],
+];
+
+const rawToEntity = new Map(rawToEntityEntries);
+
+const rawRe = new RegExp(`[${[...rawToEntity.keys()].join("")}]`, "g");
+
+function escapeHTML(str) {
+  return str.replaceAll(
+    rawRe,
+    (m) => rawToEntity.has(m) ? rawToEntity.get(m) : m,
+  );
+}
+
+/** Duck typing our way to common visualization and tabular libraries */
+/** Vegalite */
+function isVegaLike(obj) {
+  return obj !== null && typeof obj === "object" && "toSpec" in obj;
+}
+function extractVega(obj) {
+  const spec = obj.toSpec();
+  if (!("$schema" in spec)) {
+    return null;
+  }
+  if (typeof spec !== "object") {
+    return null;
+  }
+  let mediaType = "application/vnd.vega.v5+json";
+  if (spec.$schema === "https://vega.github.io/schema/vega-lite/v4.json") {
+    mediaType = "application/vnd.vegalite.v4+json";
+  } else if (
+    spec.$schema === "https://vega.github.io/schema/vega-lite/v5.json"
+  ) {
+    mediaType = "application/vnd.vegalite.v5+json";
+  }
+  return {
+    [mediaType]: spec,
+  };
+}
+/** Polars */
+function isDataFrameLike(obj) {
+  const isObject = obj !== null && typeof obj === "object";
+  if (!isObject) {
+    return false;
+  }
+  const df = obj;
+  return df.schema !== void 0 && typeof df.schema === "object" &&
+    df.head !== void 0 && typeof df.head === "function" &&
+    df.toRecords !== void 0 && typeof df.toRecords === "function";
+}
+/**
+ * Map Polars DataType to JSON Schema data types.
+ * @param dataType - The Polars DataType.
+ * @returns The corresponding JSON Schema data type.
+ */
+function mapPolarsTypeToJSONSchema(colType) {
+  const typeMapping = {
+    Null: "null",
+    Bool: "boolean",
+    Int8: "integer",
+    Int16: "integer",
+    Int32: "integer",
+    Int64: "integer",
+    UInt8: "integer",
+    UInt16: "integer",
+    UInt32: "integer",
+    UInt64: "integer",
+    Float32: "number",
+    Float64: "number",
+    Date: "string",
+    Datetime: "string",
+    Utf8: "string",
+    Categorical: "string",
+    List: "array",
+    Struct: "object",
+  };
+  // These colTypes are weird. When you console.dir or console.log them
+  // they show a `DataType` field, however you can't access it directly until you
+  // convert it to JSON
+  const dataType = colType.toJSON()["DataType"];
+  return typeMapping[dataType] || "string";
+}
+
+function extractDataFrame(df) {
+  const fields = [];
+  const schema = {
+    fields,
+  };
+  let data = [];
+  // Convert DataFrame schema to Tabular DataResource schema
+  for (const [colName, colType] of Object.entries(df.schema)) {
+    const dataType = mapPolarsTypeToJSONSchema(colType);
+    schema.fields.push({
+      name: colName,
+      type: dataType,
+    });
+  }
+  // Convert DataFrame data to row-oriented JSON
+  //
+  // TODO(rgbkrk): Determine how to get the polars format max rows
+  //       Since pl.setTblRows just sets env var POLARS_FMT_MAX_ROWS,
+  //       we probably just have to pick a number for now.
+  //
+
+  data = df.head(50).toRecords();
+  let htmlTable = "<table>";
+  htmlTable += "<thead><tr>";
+  schema.fields.forEach((field) => {
+    htmlTable += `<th>${escapeHTML(String(field.name))}</th>`;
+  });
+  htmlTable += "</tr></thead>";
+  htmlTable += "<tbody>";
+  df.head(10).toRecords().forEach((row) => {
+    htmlTable += "<tr>";
+    schema.fields.forEach((field) => {
+      htmlTable += `<td>${escapeHTML(String(row[field.name]))}</td>`;
+    });
+    htmlTable += "</tr>";
+  });
+  htmlTable += "</tbody></table>";
+  return {
+    "application/vnd.dataresource+json": { data, schema },
+    "text/html": htmlTable,
+  };
+}
+
+/** Canvas */
+function isCanvasLike(obj) {
+  return obj !== null && typeof obj === "object" && "toDataURL" in obj;
+}
+
+/** Possible HTML and SVG Elements */
+function isSVGElementLike(obj) {
+  return obj !== null && typeof obj === "object" && "outerHTML" in obj &&
+    typeof obj.outerHTML === "string" && obj.outerHTML.startsWith("<svg");
+}
+
+function isHTMLElementLike(obj) {
+  return obj !== null && typeof obj === "object" && "outerHTML" in obj &&
+    typeof obj.outerHTML === "string";
+}
+
+/** Check to see if an object already contains a `Symbol.for("Jupyter.display") */
+function hasDisplaySymbol(obj) {
+  return obj !== null && typeof obj === "object" && $display in obj &&
+    typeof obj[$display] === "function";
+}
+
+function makeDisplayable(obj) {
+  return {
+    [$display]: () => obj,
+  };
+}
+
+/**
+ * Format an object for displaying in Deno
+ *
+ * @param obj - The object to be displayed
+ * @returns MediaBundle
+ */
+async function format(obj) {
+  if (hasDisplaySymbol(obj)) {
+    return await obj[$display]();
+  }
+  if (typeof obj !== "object") {
+    return {
+      "text/plain": Deno[Deno.internal].inspectArgs(["%o", obj], {
+        colors: !Deno.noColor,
+      }),
+    };
+  }
+
+  if (isCanvasLike(obj)) {
+    const dataURL = obj.toDataURL();
+    const parts = dataURL.split(",");
+    const mime = parts[0].split(":")[1].split(";")[0];
+    const data = parts[1];
+    return {
+      [mime]: data,
+    };
+  }
+  if (isVegaLike(obj)) {
+    return extractVega(obj);
+  }
+  if (isDataFrameLike(obj)) {
+    return extractDataFrame(obj);
+  }
+  if (isSVGElementLike(obj)) {
+    return {
+      "image/svg+xml": obj.outerHTML,
+    };
+  }
+  if (isHTMLElementLike(obj)) {
+    return {
+      "text/html": obj.outerHTML,
+    };
+  }
+  return {
+    "text/plain": Deno[Deno.internal].inspectArgs(["%o", obj], {
+      colors: !Deno.noColor,
+    }),
+  };
+}
+
+/**
+ * This function creates a tagged template function for a given media type.
+ * The tagged template function takes a template string and returns a displayable object.
+ *
+ * @param mediatype - The media type for the tagged template function.
+ * @returns A function that takes a template string and returns a displayable object.
+ */
+function createTaggedTemplateDisplayable(mediatype) {
+  return (strings, ...values) => {
+    const payload = strings.reduce(
+      (acc, string, i) =>
+        acc + string + (values[i] !== undefined ? values[i] : ""),
+      "",
+    );
+    return makeDisplayable({ [mediatype]: payload });
+  };
+}
+
+/**
+ * Show Markdown in Jupyter frontends with a tagged template function.
+ *
+ * Takes a template string and returns a displayable object for Jupyter frontends.
+ *
+ * @example
+ * Create a Markdown view.
+ *
+ * ```typescript
+ * md`# Notebooks in TypeScript via Deno ![Deno logo](https://github.com/denoland.png?size=32)
+ *
+ * * TypeScript ${Deno.version.typescript}
+ * * V8 ${Deno.version.v8}
+ * * Deno ${Deno.version.deno}
+ *
+ * Interactive compute with Jupyter _built into Deno_!
+ * `
+ * ```
+ */
+const md = createTaggedTemplateDisplayable("text/markdown");
+
+/**
+ * Show HTML in Jupyter frontends with a tagged template function.
+ *
+ * Takes a template string and returns a displayable object for Jupyter frontends.
+ *
+ * @example
+ * Create an HTML view.
+ * ```typescript
+ * html`<h1>Hello, world!</h1>`
+ * ```
+ */
+const html = createTaggedTemplateDisplayable("text/html");
+/**
+ * SVG Tagged Template Function.
+ *
+ * Takes a template string and returns a displayable object for Jupyter frontends.
+ *
+ * Example usage:
+ *
+ * svg`<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+ *      <circle cx="50" cy="50" r="40" stroke="green" stroke-width="4" fill="yellow" />
+ *    </svg>`
+ */
+const svg = createTaggedTemplateDisplayable("image/svg+xml");
+
+function isMediaBundle(obj) {
+  if (obj == null || typeof obj !== "object" || Array.isArray(obj)) {
+    return false;
+  }
+  for (const key in obj) {
+    if (typeof key !== "string") {
+      return false;
+    }
+  }
+  return true;
+}
+
+async function formatInner(obj, raw) {
+  if (raw && isMediaBundle(obj)) {
+    return obj;
+  } else {
+    return await format(obj);
+  }
+}
+
+internals.jupyter = { formatInner };
+
 function enableJupyter() {
   const {
     op_jupyter_broadcast,
   } = core.ensureFastOps();
 
+  async function broadcast(
+    msgType,
+    content,
+    { metadata = {}, buffers = [] } = {},
+  ) {
+    await op_jupyter_broadcast(msgType, content, metadata, buffers);
+  }
+
+  async function broadcastResult(executionCount, result) {
+    try {
+      if (result === undefined) {
+        return;
+      }
+
+      const data = await format(result);
+      await broadcast("execute_result", {
+        execution_count: executionCount,
+        data,
+        metadata: {},
+      });
+    } catch (err) {
+      if (err instanceof Error) {
+        const stack = err.stack || "";
+        await broadcast("error", {
+          ename: err.name,
+          evalue: err.message,
+          traceback: stack.split("\n"),
+        });
+      } else if (typeof err == "string") {
+        await broadcast("error", {
+          ename: "Error",
+          evalue: err,
+          traceback: [],
+        });
+      } else {
+        await broadcast("error", {
+          ename: "Error",
+          evalue:
+            "An error occurred while formatting a result, but it could not be identified",
+          traceback: [],
+        });
+      }
+    }
+  }
+
+  internals.jupyter.broadcastResult = broadcastResult;
+
+  /**
+   * Display function for Jupyter Deno Kernel.
+   * Mimics the behavior of IPython's `display(obj, raw=True)` function to allow
+   * asynchronous displaying of objects in Jupyter.
+   *
+   * @param obj - The object to be displayed
+   * @param options - Display options
+   */
+  async function display(obj, options = { raw: false, update: false }) {
+    const bundle = await formatInner(obj, options.raw);
+    let messageType = "display_data";
+    if (options.update) {
+      messageType = "update_display_data";
+    }
+    let transient = {};
+    if (options.display_id) {
+      transient = { display_id: options.display_id };
+    }
+    await broadcast(messageType, {
+      data: bundle,
+      metadata: {},
+      transient,
+    });
+    return;
+  }
+
   globalThis.Deno.jupyter = {
-    async broadcast(msgType, content, { metadata = {}, buffers = [] } = {}) {
-      await op_jupyter_broadcast(msgType, content, metadata, buffers);
-    },
+    broadcast,
+    display,
+    format,
+    md,
+    html,
+    svg,
+    $display,
   };
 }
 
diff --git a/cli/tests/testdata/jupyter/integration_test.ipynb b/cli/tests/testdata/jupyter/integration_test.ipynb
index b8aed651c19ce3..19667938ca1925 100644
--- a/cli/tests/testdata/jupyter/integration_test.ipynb
+++ b/cli/tests/testdata/jupyter/integration_test.ipynb
@@ -108,7 +108,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 4,
+   "execution_count": 3,
    "id": "08a17340",
    "metadata": {
     "hidden": true
@@ -120,7 +120,7 @@
        "{ color: \u001b[32m\"red\"\u001b[39m, area: \u001b[33m10000\u001b[39m }"
       ]
      },
-     "execution_count": 4,
+     "execution_count": 3,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -165,7 +165,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 5,
+   "execution_count": 4,
    "id": "bbf2c09b",
    "metadata": {
     "hidden": true
@@ -188,7 +188,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 6,
+   "execution_count": 5,
    "id": "d9801d80",
    "metadata": {
     "hidden": true
@@ -200,7 +200,7 @@
        "\u001b[1mnull\u001b[22m"
       ]
      },
-     "execution_count": 6,
+     "execution_count": 5,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -222,7 +222,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 7,
+   "execution_count": 6,
    "id": "cfaac330",
    "metadata": {
     "hidden": true
@@ -234,7 +234,7 @@
        "\u001b[33mtrue\u001b[39m"
       ]
      },
-     "execution_count": 7,
+     "execution_count": 6,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -256,7 +256,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 8,
+   "execution_count": 7,
    "id": "ec3be2da",
    "metadata": {
     "hidden": true
@@ -268,7 +268,7 @@
        "\u001b[33m42\u001b[39m"
       ]
      },
-     "execution_count": 8,
+     "execution_count": 7,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -290,7 +290,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 9,
+   "execution_count": 8,
    "id": "997cf2d7",
    "metadata": {
     "hidden": true
@@ -302,7 +302,7 @@
        "\u001b[32m\"this is a test of the emergency broadcast system\"\u001b[39m"
       ]
      },
-     "execution_count": 9,
+     "execution_count": 8,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -324,7 +324,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 10,
+   "execution_count": 9,
    "id": "44b63807",
    "metadata": {
     "hidden": true
@@ -336,7 +336,7 @@
        "\u001b[33m31337n\u001b[39m"
       ]
      },
-     "execution_count": 10,
+     "execution_count": 9,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -358,7 +358,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 11,
+   "execution_count": 12,
    "id": "e10c0d31",
    "metadata": {
     "hidden": true
@@ -370,7 +370,7 @@
        "\u001b[32mSymbol(foo)\u001b[39m"
       ]
      },
-     "execution_count": 11,
+     "execution_count": 12,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -392,7 +392,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 12,
+   "execution_count": 14,
    "id": "81c99233",
    "metadata": {
     "hidden": true
@@ -404,7 +404,7 @@
        "{ foo: \u001b[32m\"bar\"\u001b[39m }"
       ]
      },
-     "execution_count": 12,
+     "execution_count": 14,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -426,7 +426,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 13,
+   "execution_count": 15,
    "id": "43c1581b",
    "metadata": {
     "hidden": true
@@ -438,7 +438,7 @@
        "Promise { \u001b[32m\"it worked!\"\u001b[39m }"
       ]
      },
-     "execution_count": 13,
+     "execution_count": 15,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -449,7 +449,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 14,
+   "execution_count": 16,
    "id": "9a34b725",
    "metadata": {
     "hidden": true
@@ -464,7 +464,7 @@
        "}"
       ]
      },
-     "execution_count": 14,
+     "execution_count": 16,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -475,7 +475,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 15,
+   "execution_count": 17,
    "id": "b5c7b819",
    "metadata": {
     "scrolled": true
@@ -501,7 +501,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 16,
+   "execution_count": 18,
    "id": "14844fc9-536e-4121-a9bd-fc2d3f7b6395",
    "metadata": {},
    "outputs": [
@@ -522,23 +522,17 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 19,
+   "execution_count": 20,
    "id": "72d01fdd",
    "metadata": {},
    "outputs": [
     {
      "data": {
       "text/plain": [
-       "Promise {\n",
-       "  \u001b[36m<rejected>\u001b[39m NotFound: No such file or directory (os error 2): readfile ''\n",
-       "    at async Object.readFile (ext:deno_fs/30_fs.js:716:18) {\n",
-       "    name: \u001b[32m\"NotFound\"\u001b[39m,\n",
-       "    code: \u001b[32m\"ENOENT\"\u001b[39m\n",
-       "  }\n",
-       "}"
+       "Promise { \u001b[36m<pending>\u001b[39m }"
       ]
      },
-     "execution_count": 19,
+     "execution_count": 20,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -549,7 +543,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 20,
+   "execution_count": 21,
    "id": "28cf59d0-6908-4edc-bb10-c325beeee362",
    "metadata": {},
    "outputs": [
@@ -567,7 +561,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 21,
+   "execution_count": 22,
    "id": "8d5485c3-0da3-43fe-8ef5-a61e672f5e81",
    "metadata": {},
    "outputs": [
@@ -585,7 +579,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 22,
+   "execution_count": 23,
    "id": "1401d9d5-6994-4c7b-b55a-db3c16a1e2dc",
    "metadata": {},
    "outputs": [
@@ -595,7 +589,7 @@
        "\u001b[32m\"Cool 🫡\"\u001b[39m"
       ]
      },
-     "execution_count": 22,
+     "execution_count": 23,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -606,7 +600,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 23,
+   "execution_count": 24,
    "id": "7afdaa0a-a2a0-4f52-8c7d-b6c5f237aa0d",
    "metadata": {},
    "outputs": [
@@ -638,7 +632,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": 25,
    "id": "b33808fd",
    "metadata": {},
    "outputs": [
@@ -648,10 +642,10 @@
      "text": [
       "passing test ... \u001b[0m\u001b[32mok\u001b[0m \u001b[0m\u001b[38;5;245m(1ms)\u001b[0m\n",
       "passing test with steps ...\n",
-      "  step 1 ... \u001b[0m\u001b[32mok\u001b[0m \u001b[0m\u001b[38;5;245m(0ms)\u001b[0m\n",
+      "  step 1 ... \u001b[0m\u001b[32mok\u001b[0m \u001b[0m\u001b[38;5;245m(1ms)\u001b[0m\n",
       "  step 2 ... \u001b[0m\u001b[32mok\u001b[0m \u001b[0m\u001b[38;5;245m(0ms)\u001b[0m\n",
       "passing test with steps ... \u001b[0m\u001b[32mok\u001b[0m \u001b[0m\u001b[38;5;245m(1ms)\u001b[0m\n",
-      "failing test ... \u001b[0m\u001b[31mFAILED\u001b[0m \u001b[0m\u001b[38;5;245m(1ms)\u001b[0m\n",
+      "failing test ... \u001b[0m\u001b[31mFAILED\u001b[0m \u001b[0m\u001b[38;5;245m(2ms)\u001b[0m\n",
       "\n",
       "\u001b[0m\u001b[1m\u001b[37m\u001b[41m ERRORS \u001b[0m\n",
       "\n",
@@ -690,7 +684,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 24,
+   "execution_count": 26,
    "id": "8e93df23-06eb-414b-98d4-51fbebb53d1f",
    "metadata": {},
    "outputs": [
@@ -746,7 +740,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 25,
+   "execution_count": 27,
    "id": "6e9b530f-554d-4ef7-a5d6-69432283fd40",
    "metadata": {},
    "outputs": [],
@@ -793,17 +787,17 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 26,
+   "execution_count": 33,
    "id": "f678313e-06c6-4fb8-a4ef-54a417129a82",
    "metadata": {},
    "outputs": [
     {
      "data": {
       "text/html": [
-       "<div style=\"width: 32px; height: 32px; background-color: #239814\" />"
+       "<div style=\"width: 32px; height: 32px; background-color: #ff5398\" />"
       ]
      },
-     "execution_count": 26,
+     "execution_count": 33,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -811,7 +805,7 @@
    "source": [
     "class SuperColor {\n",
     "  constructor() {\n",
-    "      this.color = \"#239814\"\n",
+    "      this.color = \"#ff5398\"\n",
     "  }\n",
     "  hex() {\n",
     "      return this.color\n",
@@ -830,17 +824,17 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 27,
+   "execution_count": 32,
    "id": "c1296291-a3e8-457b-8329-6cc58a1e528a",
    "metadata": {},
    "outputs": [
     {
      "data": {
       "text/html": [
-       "<div style=\"width: 32px; height: 32px; background-color: #239814\" />"
+       "<div style=\"width: 32px; height: 32px; background-color: #5398ff\" />"
       ]
      },
-     "execution_count": 27,
+     "execution_count": 32,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -848,7 +842,7 @@
    "source": [
     "class SuperColorAsync {\n",
     "  constructor() {\n",
-    "      this.color = \"#239814\"\n",
+    "      this.color = \"#5398ff\"\n",
     "  }\n",
     "  hex() {\n",
     "      return this.color\n",
@@ -864,6 +858,3553 @@
     "let sc = new SuperColorAsync()\n",
     "sc"
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "60b7d0da-53bf-4b42-a7d1-8370c7e2314d",
+   "metadata": {},
+   "source": [
+    "## Some classes will have built in support / handling via `Deno.jupyter.format` under the hood."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 36,
+   "id": "a46fb36b-bdf4-48d9-ae8c-9842d23b5456",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "application/vnd.dataresource+json": {
+       "data": [
+        {
+         "abbrev": "Kos.",
+         "abbrev_len": 4,
+         "adm0_a3": "KOS",
+         "adm0_a3_is": "SRB",
+         "adm0_a3_un": -99,
+         "adm0_a3_us": "KOS",
+         "adm0_a3_wb": -99,
+         "adm0_dif": 0,
+         "admin": "Kosovo",
+         "brk_a3": "B57",
+         "brk_diff": 1,
+         "brk_group": null,
+         "brk_name": "Kosovo",
+         "continent": "Europe",
+         "economy": "6. Developing region",
+         "featurecla": "Admin-0 country",
+         "fips_10": null,
+         "formal_en": "Republic of Kosovo",
+         "formal_fr": null,
+         "gdp_md_est": 5352,
+         "gdp_year": -99,
+         "geou_dif": 0,
+         "geounit": "Kosovo",
+         "gu_a3": "KOS",
+         "homepart": 1,
+         "income_grp": "4. Lower middle income",
+         "iso_a2": "-99",
+         "iso_a3": "-99",
+         "iso_n3": -99,
+         "labelrank": 6,
+         "lastcensus": 1981,
+         "level": 2,
+         "long_len": 6,
+         "mapcolor13": 11,
+         "mapcolor7": 2,
+         "mapcolor8": 2,
+         "mapcolor9": 3,
+         "name": "Kosovo",
+         "name_alt": null,
+         "name_len": 6,
+         "name_long": "Kosovo",
+         "name_sort": "Kosovo",
+         "note_adm0": null,
+         "note_brk": "Self admin.; Claimed by Serbia",
+         "pop_est": 1804838,
+         "pop_year": -99,
+         "postal": "KO",
+         "region_un": "Europe",
+         "region_wb": "Europe & Central Asia",
+         "scalerank": 1,
+         "sov_a3": "KOS",
+         "sovereignt": "Kosovo",
+         "su_a3": "KOS",
+         "su_dif": 0,
+         "subregion": "Southern Europe",
+         "subunit": "Kosovo",
+         "tiny": -99,
+         "type": "Sovereign country",
+         "un_a3": -99,
+         "wb_a2": "KV",
+         "wb_a3": "KSV",
+         "wikipedia": -99,
+         "woe_id": -99
+        },
+        {
+         "abbrev": "Solnd.",
+         "abbrev_len": 6,
+         "adm0_a3": "SOL",
+         "adm0_a3_is": "SOM",
+         "adm0_a3_un": -99,
+         "adm0_a3_us": "SOM",
+         "adm0_a3_wb": -99,
+         "adm0_dif": 0,
+         "admin": "Somaliland",
+         "brk_a3": "B30",
+         "brk_diff": 1,
+         "brk_group": null,
+         "brk_name": "Somaliland",
+         "continent": "Africa",
+         "economy": "6. Developing region",
+         "featurecla": "Admin-0 country",
+         "fips_10": null,
+         "formal_en": "Republic of Somaliland",
+         "formal_fr": null,
+         "gdp_md_est": 12250,
+         "gdp_year": -99,
+         "geou_dif": 0,
+         "geounit": "Somaliland",
+         "gu_a3": "SOL",
+         "homepart": 1,
+         "income_grp": "4. Lower middle income",
+         "iso_a2": "-99",
+         "iso_a3": "-99",
+         "iso_n3": -99,
+         "labelrank": 5,
+         "lastcensus": -99,
+         "level": 2,
+         "long_len": 10,
+         "mapcolor13": 2,
+         "mapcolor7": 3,
+         "mapcolor8": 6,
+         "mapcolor9": 5,
+         "name": "Somaliland",
+         "name_alt": null,
+         "name_len": 10,
+         "name_long": "Somaliland",
+         "name_sort": "Somaliland",
+         "note_adm0": "Self admin.",
+         "note_brk": "Self admin.; Claimed by Somalia",
+         "pop_est": 3500000,
+         "pop_year": -99,
+         "postal": "SL",
+         "region_un": "Africa",
+         "region_wb": "Sub-Saharan Africa",
+         "scalerank": 1,
+         "sov_a3": "SOL",
+         "sovereignt": "Somaliland",
+         "su_a3": "SOL",
+         "su_dif": 0,
+         "subregion": "Eastern Africa",
+         "subunit": "Somaliland",
+         "tiny": -99,
+         "type": "Indeterminate",
+         "un_a3": -99,
+         "wb_a2": "-99",
+         "wb_a3": "-99",
+         "wikipedia": -99,
+         "woe_id": -99
+        },
+        {
+         "abbrev": "N. Cy.",
+         "abbrev_len": 6,
+         "adm0_a3": "CYN",
+         "adm0_a3_is": "CYP",
+         "adm0_a3_un": -99,
+         "adm0_a3_us": "CYP",
+         "adm0_a3_wb": -99,
+         "adm0_dif": 0,
+         "admin": "Northern Cyprus",
+         "brk_a3": "B20",
+         "brk_diff": 1,
+         "brk_group": null,
+         "brk_name": "N. Cyprus",
+         "continent": "Asia",
+         "economy": "6. Developing region",
+         "featurecla": "Admin-0 country",
+         "fips_10": null,
+         "formal_en": "Turkish Republic of Northern Cyprus",
+         "formal_fr": null,
+         "gdp_md_est": 3600,
+         "gdp_year": -99,
+         "geou_dif": 0,
+         "geounit": "Northern Cyprus",
+         "gu_a3": "CYN",
+         "homepart": 1,
+         "income_grp": "3. Upper middle income",
+         "iso_a2": "-99",
+         "iso_a3": "-99",
+         "iso_n3": -99,
+         "labelrank": 6,
+         "lastcensus": -99,
+         "level": 2,
+         "long_len": 15,
+         "mapcolor13": 8,
+         "mapcolor7": 3,
+         "mapcolor8": 1,
+         "mapcolor9": 4,
+         "name": "N. Cyprus",
+         "name_alt": null,
+         "name_len": 9,
+         "name_long": "Northern Cyprus",
+         "name_sort": "Cyprus, Northern",
+         "note_adm0": "Self admin.",
+         "note_brk": "Self admin.; Claimed by Cyprus",
+         "pop_est": 265100,
+         "pop_year": -99,
+         "postal": "CN",
+         "region_un": "Asia",
+         "region_wb": "Europe & Central Asia",
+         "scalerank": 1,
+         "sov_a3": "CYN",
+         "sovereignt": "Northern Cyprus",
+         "su_a3": "CYN",
+         "su_dif": 0,
+         "subregion": "Western Asia",
+         "subunit": "Northern Cyprus",
+         "tiny": -99,
+         "type": "Sovereign country",
+         "un_a3": -99,
+         "wb_a2": "-99",
+         "wb_a3": "-99",
+         "wikipedia": -99,
+         "woe_id": -99
+        },
+        {
+         "abbrev": "Afg.",
+         "abbrev_len": 4,
+         "adm0_a3": "AFG",
+         "adm0_a3_is": "AFG",
+         "adm0_a3_un": -99,
+         "adm0_a3_us": "AFG",
+         "adm0_a3_wb": -99,
+         "adm0_dif": 0,
+         "admin": "Afghanistan",
+         "brk_a3": "AFG",
+         "brk_diff": 0,
+         "brk_group": null,
+         "brk_name": "Afghanistan",
+         "continent": "Asia",
+         "economy": "7. Least developed region",
+         "featurecla": "Admin-0 country",
+         "fips_10": null,
+         "formal_en": "Islamic State of Afghanistan",
+         "formal_fr": null,
+         "gdp_md_est": 22270,
+         "gdp_year": -99,
+         "geou_dif": 0,
+         "geounit": "Afghanistan",
+         "gu_a3": "AFG",
+         "homepart": 1,
+         "income_grp": "5. Low income",
+         "iso_a2": "AF",
+         "iso_a3": "AFG",
+         "iso_n3": 4,
+         "labelrank": 3,
+         "lastcensus": 1979,
+         "level": 2,
+         "long_len": 11,
+         "mapcolor13": 7,
+         "mapcolor7": 5,
+         "mapcolor8": 6,
+         "mapcolor9": 8,
+         "name": "Afghanistan",
+         "name_alt": null,
+         "name_len": 11,
+         "name_long": "Afghanistan",
+         "name_sort": "Afghanistan",
+         "note_adm0": null,
+         "note_brk": null,
+         "pop_est": 28400000,
+         "pop_year": -99,
+         "postal": "AF",
+         "region_un": "Asia",
+         "region_wb": "South Asia",
+         "scalerank": 1,
+         "sov_a3": "AFG",
+         "sovereignt": "Afghanistan",
+         "su_a3": "AFG",
+         "su_dif": 0,
+         "subregion": "Southern Asia",
+         "subunit": "Afghanistan",
+         "tiny": -99,
+         "type": "Sovereign country",
+         "un_a3": 4,
+         "wb_a2": "AF",
+         "wb_a3": "AFG",
+         "wikipedia": -99,
+         "woe_id": -99
+        },
+        {
+         "abbrev": "Ang.",
+         "abbrev_len": 4,
+         "adm0_a3": "AGO",
+         "adm0_a3_is": "AGO",
+         "adm0_a3_un": -99,
+         "adm0_a3_us": "AGO",
+         "adm0_a3_wb": -99,
+         "adm0_dif": 0,
+         "admin": "Angola",
+         "brk_a3": "AGO",
+         "brk_diff": 0,
+         "brk_group": null,
+         "brk_name": "Angola",
+         "continent": "Africa",
+         "economy": "7. Least developed region",
+         "featurecla": "Admin-0 country",
+         "fips_10": null,
+         "formal_en": "People's Republic of Angola",
+         "formal_fr": null,
+         "gdp_md_est": 110300,
+         "gdp_year": -99,
+         "geou_dif": 0,
+         "geounit": "Angola",
+         "gu_a3": "AGO",
+         "homepart": 1,
+         "income_grp": "3. Upper middle income",
+         "iso_a2": "AO",
+         "iso_a3": "AGO",
+         "iso_n3": 24,
+         "labelrank": 3,
+         "lastcensus": 1970,
+         "level": 2,
+         "long_len": 6,
+         "mapcolor13": 1,
+         "mapcolor7": 3,
+         "mapcolor8": 2,
+         "mapcolor9": 6,
+         "name": "Angola",
+         "name_alt": null,
+         "name_len": 6,
+         "name_long": "Angola",
+         "name_sort": "Angola",
+         "note_adm0": null,
+         "note_brk": null,
+         "pop_est": 12799293,
+         "pop_year": -99,
+         "postal": "AO",
+         "region_un": "Africa",
+         "region_wb": "Sub-Saharan Africa",
+         "scalerank": 1,
+         "sov_a3": "AGO",
+         "sovereignt": "Angola",
+         "su_a3": "AGO",
+         "su_dif": 0,
+         "subregion": "Middle Africa",
+         "subunit": "Angola",
+         "tiny": -99,
+         "type": "Sovereign country",
+         "un_a3": 24,
+         "wb_a2": "AO",
+         "wb_a3": "AGO",
+         "wikipedia": -99,
+         "woe_id": -99
+        },
+        {
+         "abbrev": "Alb.",
+         "abbrev_len": 4,
+         "adm0_a3": "ALB",
+         "adm0_a3_is": "ALB",
+         "adm0_a3_un": -99,
+         "adm0_a3_us": "ALB",
+         "adm0_a3_wb": -99,
+         "adm0_dif": 0,
+         "admin": "Albania",
+         "brk_a3": "ALB",
+         "brk_diff": 0,
+         "brk_group": null,
+         "brk_name": "Albania",
+         "continent": "Europe",
+         "economy": "6. Developing region",
+         "featurecla": "Admin-0 country",
+         "fips_10": null,
+         "formal_en": "Republic of Albania",
+         "formal_fr": null,
+         "gdp_md_est": 21810,
+         "gdp_year": -99,
+         "geou_dif": 0,
+         "geounit": "Albania",
+         "gu_a3": "ALB",
+         "homepart": 1,
+         "income_grp": "4. Lower middle income",
+         "iso_a2": "AL",
+         "iso_a3": "ALB",
+         "iso_n3": 8,
+         "labelrank": 6,
+         "lastcensus": 2001,
+         "level": 2,
+         "long_len": 7,
+         "mapcolor13": 6,
+         "mapcolor7": 1,
+         "mapcolor8": 4,
+         "mapcolor9": 1,
+         "name": "Albania",
+         "name_alt": null,
+         "name_len": 7,
+         "name_long": "Albania",
+         "name_sort": "Albania",
+         "note_adm0": null,
+         "note_brk": null,
+         "pop_est": 3639453,
+         "pop_year": -99,
+         "postal": "AL",
+         "region_un": "Europe",
+         "region_wb": "Europe & Central Asia",
+         "scalerank": 1,
+         "sov_a3": "ALB",
+         "sovereignt": "Albania",
+         "su_a3": "ALB",
+         "su_dif": 0,
+         "subregion": "Southern Europe",
+         "subunit": "Albania",
+         "tiny": -99,
+         "type": "Sovereign country",
+         "un_a3": 8,
+         "wb_a2": "AL",
+         "wb_a3": "ALB",
+         "wikipedia": -99,
+         "woe_id": -99
+        },
+        {
+         "abbrev": "U.A.E.",
+         "abbrev_len": 6,
+         "adm0_a3": "ARE",
+         "adm0_a3_is": "ARE",
+         "adm0_a3_un": -99,
+         "adm0_a3_us": "ARE",
+         "adm0_a3_wb": -99,
+         "adm0_dif": 0,
+         "admin": "United Arab Emirates",
+         "brk_a3": "ARE",
+         "brk_diff": 0,
+         "brk_group": null,
+         "brk_name": "United Arab Emirates",
+         "continent": "Asia",
+         "economy": "6. Developing region",
+         "featurecla": "Admin-0 country",
+         "fips_10": null,
+         "formal_en": "United Arab Emirates",
+         "formal_fr": null,
+         "gdp_md_est": 184300,
+         "gdp_year": -99,
+         "geou_dif": 0,
+         "geounit": "United Arab Emirates",
+         "gu_a3": "ARE",
+         "homepart": 1,
+         "income_grp": "2. High income: nonOECD",
+         "iso_a2": "AE",
+         "iso_a3": "ARE",
+         "iso_n3": 784,
+         "labelrank": 4,
+         "lastcensus": 2010,
+         "level": 2,
+         "long_len": 20,
+         "mapcolor13": 3,
+         "mapcolor7": 2,
+         "mapcolor8": 1,
+         "mapcolor9": 3,
+         "name": "United Arab Emirates",
+         "name_alt": null,
+         "name_len": 20,
+         "name_long": "United Arab Emirates",
+         "name_sort": "United Arab Emirates",
+         "note_adm0": null,
+         "note_brk": null,
+         "pop_est": 4798491,
+         "pop_year": -99,
+         "postal": "AE",
+         "region_un": "Asia",
+         "region_wb": "Middle East & North Africa",
+         "scalerank": 1,
+         "sov_a3": "ARE",
+         "sovereignt": "United Arab Emirates",
+         "su_a3": "ARE",
+         "su_dif": 0,
+         "subregion": "Western Asia",
+         "subunit": "United Arab Emirates",
+         "tiny": -99,
+         "type": "Sovereign country",
+         "un_a3": 784,
+         "wb_a2": "AE",
+         "wb_a3": "ARE",
+         "wikipedia": -99,
+         "woe_id": -99
+        },
+        {
+         "abbrev": "Arg.",
+         "abbrev_len": 4,
+         "adm0_a3": "ARG",
+         "adm0_a3_is": "ARG",
+         "adm0_a3_un": -99,
+         "adm0_a3_us": "ARG",
+         "adm0_a3_wb": -99,
+         "adm0_dif": 0,
+         "admin": "Argentina",
+         "brk_a3": "ARG",
+         "brk_diff": 0,
+         "brk_group": null,
+         "brk_name": "Argentina",
+         "continent": "South America",
+         "economy": "5. Emerging region: G20",
+         "featurecla": "Admin-0 country",
+         "fips_10": null,
+         "formal_en": "Argentine Republic",
+         "formal_fr": null,
+         "gdp_md_est": 573900,
+         "gdp_year": -99,
+         "geou_dif": 0,
+         "geounit": "Argentina",
+         "gu_a3": "ARG",
+         "homepart": 1,
+         "income_grp": "3. Upper middle income",
+         "iso_a2": "AR",
+         "iso_a3": "ARG",
+         "iso_n3": 32,
+         "labelrank": 2,
+         "lastcensus": 2010,
+         "level": 2,
+         "long_len": 9,
+         "mapcolor13": 13,
+         "mapcolor7": 3,
+         "mapcolor8": 1,
+         "mapcolor9": 3,
+         "name": "Argentina",
+         "name_alt": null,
+         "name_len": 9,
+         "name_long": "Argentina",
+         "name_sort": "Argentina",
+         "note_adm0": null,
+         "note_brk": null,
+         "pop_est": 40913584,
+         "pop_year": -99,
+         "postal": "AR",
+         "region_un": "Americas",
+         "region_wb": "Latin America & Caribbean",
+         "scalerank": 1,
+         "sov_a3": "ARG",
+         "sovereignt": "Argentina",
+         "su_a3": "ARG",
+         "su_dif": 0,
+         "subregion": "South America",
+         "subunit": "Argentina",
+         "tiny": -99,
+         "type": "Sovereign country",
+         "un_a3": 32,
+         "wb_a2": "AR",
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+         "wikipedia": -99,
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+       "<table><thead><tr><th>scalerank</th><th>featurecla</th><th>labelrank</th><th>sovereignt</th><th>sov_a3</th><th>adm0_dif</th><th>level</th><th>type</th><th>admin</th><th>adm0_a3</th><th>geou_dif</th><th>geounit</th><th>gu_a3</th><th>su_dif</th><th>subunit</th><th>su_a3</th><th>brk_diff</th><th>name</th><th>name_long</th><th>brk_a3</th><th>brk_name</th><th>brk_group</th><th>abbrev</th><th>postal</th><th>formal_en</th><th>formal_fr</th><th>note_adm0</th><th>note_brk</th><th>name_sort</th><th>name_alt</th><th>mapcolor7</th><th>mapcolor8</th><th>mapcolor9</th><th>mapcolor13</th><th>pop_est</th><th>gdp_md_est</th><th>pop_year</th><th>lastcensus</th><th>gdp_year</th><th>economy</th><th>income_grp</th><th>wikipedia</th><th>fips_10</th><th>iso_a2</th><th>iso_a3</th><th>iso_n3</th><th>un_a3</th><th>wb_a2</th><th>wb_a3</th><th>woe_id</th><th>adm0_a3_is</th><th>adm0_a3_us</th><th>adm0_a3_un</th><th>adm0_a3_wb</th><th>continent</th><th>region_un</th><th>subregion</th><th>region_wb</th><th>name_len</th><th>long_len</th><th>abbrev_len</th><th>tiny</th><th>homepart</th></tr></thead><tbody><tr><td>1</td><td>Admin-0 country</td><td>6</td><td>Kosovo</td><td>KOS</td><td>0</td><td>2</td><td>Sovereign country</td><td>Kosovo</td><td>KOS</td><td>0</td><td>Kosovo</td><td>KOS</td><td>0</td><td>Kosovo</td><td>KOS</td><td>1</td><td>Kosovo</td><td>Kosovo</td><td>B57</td><td>Kosovo</td><td>null</td><td>Kos.</td><td>KO</td><td>Republic of Kosovo</td><td>null</td><td>null</td><td>Self admin.; Claimed by Serbia</td><td>Kosovo</td><td>null</td><td>2</td><td>2</td><td>3</td><td>11</td><td>1804838</td><td>5352</td><td>-99</td><td>1981</td><td>-99</td><td>6. Developing region</td><td>4. Lower middle income</td><td>-99</td><td>null</td><td>-99</td><td>-99</td><td>-99</td><td>-99</td><td>KV</td><td>KSV</td><td>-99</td><td>SRB</td><td>KOS</td><td>-99</td><td>-99</td><td>Europe</td><td>Europe</td><td>Southern Europe</td><td>Europe & Central Asia</td><td>6</td><td>6</td><td>4</td><td>-99</td><td>1</td></tr><tr><td>1</td><td>Admin-0 country</td><td>5</td><td>Somaliland</td><td>SOL</td><td>0</td><td>2</td><td>Indeterminate</td><td>Somaliland</td><td>SOL</td><td>0</td><td>Somaliland</td><td>SOL</td><td>0</td><td>Somaliland</td><td>SOL</td><td>1</td><td>Somaliland</td><td>Somaliland</td><td>B30</td><td>Somaliland</td><td>null</td><td>Solnd.</td><td>SL</td><td>Republic of Somaliland</td><td>null</td><td>Self admin.</td><td>Self admin.; Claimed by Somalia</td><td>Somaliland</td><td>null</td><td>3</td><td>6</td><td>5</td><td>2</td><td>3500000</td><td>12250</td><td>-99</td><td>-99</td><td>-99</td><td>6. Developing region</td><td>4. Lower middle income</td><td>-99</td><td>null</td><td>-99</td><td>-99</td><td>-99</td><td>-99</td><td>-99</td><td>-99</td><td>-99</td><td>SOM</td><td>SOM</td><td>-99</td><td>-99</td><td>Africa</td><td>Africa</td><td>Eastern Africa</td><td>Sub-Saharan Africa</td><td>10</td><td>10</td><td>6</td><td>-99</td><td>1</td></tr><tr><td>1</td><td>Admin-0 country</td><td>6</td><td>Northern Cyprus</td><td>CYN</td><td>0</td><td>2</td><td>Sovereign country</td><td>Northern Cyprus</td><td>CYN</td><td>0</td><td>Northern Cyprus</td><td>CYN</td><td>0</td><td>Northern Cyprus</td><td>CYN</td><td>1</td><td>N. Cyprus</td><td>Northern Cyprus</td><td>B20</td><td>N. Cyprus</td><td>null</td><td>N. Cy.</td><td>CN</td><td>Turkish Republic of Northern Cyprus</td><td>null</td><td>Self admin.</td><td>Self admin.; Claimed by Cyprus</td><td>Cyprus, Northern</td><td>null</td><td>3</td><td>1</td><td>4</td><td>8</td><td>265100</td><td>3600</td><td>-99</td><td>-99</td><td>-99</td><td>6. Developing region</td><td>3. Upper middle income</td><td>-99</td><td>null</td><td>-99</td><td>-99</td><td>-99</td><td>-99</td><td>-99</td><td>-99</td><td>-99</td><td>CYP</td><td>CYP</td><td>-99</td><td>-99</td><td>Asia</td><td>Asia</td><td>Western Asia</td><td>Europe & Central Asia</td><td>9</td><td>15</td><td>6</td><td>-99</td><td>1</td></tr><tr><td>1</td><td>Admin-0 country</td><td>3</td><td>Afghanistan</td><td>AFG</td><td>0</td><td>2</td><td>Sovereign country</td><td>Afghanistan</td><td>AFG</td><td>0</td><td>Afghanistan</td><td>AFG</td><td>0</td><td>Afghanistan</td><td>AFG</td><td>0</td><td>Afghanistan</td><td>Afghanistan</td><td>AFG</td><td>Afghanistan</td><td>null</td><td>Afg.</td><td>AF</td><td>Islamic State of Afghanistan</td><td>null</td><td>null</td><td>null</td><td>Afghanistan</td><td>null</td><td>5</td><td>6</td><td>8</td><td>7</td><td>28400000</td><td>22270</td><td>-99</td><td>1979</td><td>-99</td><td>7. Least developed region</td><td>5. Low income</td><td>-99</td><td>null</td><td>AF</td><td>AFG</td><td>4</td><td>4</td><td>AF</td><td>AFG</td><td>-99</td><td>AFG</td><td>AFG</td><td>-99</td><td>-99</td><td>Asia</td><td>Asia</td><td>Southern Asia</td><td>South Asia</td><td>11</td><td>11</td><td>4</td><td>-99</td><td>1</td></tr><tr><td>1</td><td>Admin-0 country</td><td>3</td><td>Angola</td><td>AGO</td><td>0</td><td>2</td><td>Sovereign country</td><td>Angola</td><td>AGO</td><td>0</td><td>Angola</td><td>AGO</td><td>0</td><td>Angola</td><td>AGO</td><td>0</td><td>Angola</td><td>Angola</td><td>AGO</td><td>Angola</td><td>null</td><td>Ang.</td><td>AO</td><td>People's Republic of Angola</td><td>null</td><td>null</td><td>null</td><td>Angola</td><td>null</td><td>3</td><td>2</td><td>6</td><td>1</td><td>12799293</td><td>110300</td><td>-99</td><td>1970</td><td>-99</td><td>7. Least developed region</td><td>3. Upper middle income</td><td>-99</td><td>null</td><td>AO</td><td>AGO</td><td>24</td><td>24</td><td>AO</td><td>AGO</td><td>-99</td><td>AGO</td><td>AGO</td><td>-99</td><td>-99</td><td>Africa</td><td>Africa</td><td>Middle Africa</td><td>Sub-Saharan Africa</td><td>6</td><td>6</td><td>4</td><td>-99</td><td>1</td></tr><tr><td>1</td><td>Admin-0 country</td><td>6</td><td>Albania</td><td>ALB</td><td>0</td><td>2</td><td>Sovereign country</td><td>Albania</td><td>ALB</td><td>0</td><td>Albania</td><td>ALB</td><td>0</td><td>Albania</td><td>ALB</td><td>0</td><td>Albania</td><td>Albania</td><td>ALB</td><td>Albania</td><td>null</td><td>Alb.</td><td>AL</td><td>Republic of Albania</td><td>null</td><td>null</td><td>null</td><td>Albania</td><td>null</td><td>1</td><td>4</td><td>1</td><td>6</td><td>3639453</td><td>21810</td><td>-99</td><td>2001</td><td>-99</td><td>6. Developing region</td><td>4. Lower middle income</td><td>-99</td><td>null</td><td>AL</td><td>ALB</td><td>8</td><td>8</td><td>AL</td><td>ALB</td><td>-99</td><td>ALB</td><td>ALB</td><td>-99</td><td>-99</td><td>Europe</td><td>Europe</td><td>Southern Europe</td><td>Europe & Central Asia</td><td>7</td><td>7</td><td>4</td><td>-99</td><td>1</td></tr><tr><td>1</td><td>Admin-0 country</td><td>4</td><td>United Arab Emirates</td><td>ARE</td><td>0</td><td>2</td><td>Sovereign country</td><td>United Arab Emirates</td><td>ARE</td><td>0</td><td>United Arab Emirates</td><td>ARE</td><td>0</td><td>United Arab Emirates</td><td>ARE</td><td>0</td><td>United Arab Emirates</td><td>United Arab Emirates</td><td>ARE</td><td>United Arab Emirates</td><td>null</td><td>U.A.E.</td><td>AE</td><td>United Arab Emirates</td><td>null</td><td>null</td><td>null</td><td>United Arab Emirates</td><td>null</td><td>2</td><td>1</td><td>3</td><td>3</td><td>4798491</td><td>184300</td><td>-99</td><td>2010</td><td>-99</td><td>6. Developing region</td><td>2. High income: nonOECD</td><td>-99</td><td>null</td><td>AE</td><td>ARE</td><td>784</td><td>784</td><td>AE</td><td>ARE</td><td>-99</td><td>ARE</td><td>ARE</td><td>-99</td><td>-99</td><td>Asia</td><td>Asia</td><td>Western Asia</td><td>Middle East & North Africa</td><td>20</td><td>20</td><td>6</td><td>-99</td><td>1</td></tr><tr><td>1</td><td>Admin-0 country</td><td>2</td><td>Argentina</td><td>ARG</td><td>0</td><td>2</td><td>Sovereign country</td><td>Argentina</td><td>ARG</td><td>0</td><td>Argentina</td><td>ARG</td><td>0</td><td>Argentina</td><td>ARG</td><td>0</td><td>Argentina</td><td>Argentina</td><td>ARG</td><td>Argentina</td><td>null</td><td>Arg.</td><td>AR</td><td>Argentine Republic</td><td>null</td><td>null</td><td>null</td><td>Argentina</td><td>null</td><td>3</td><td>1</td><td>3</td><td>13</td><td>40913584</td><td>573900</td><td>-99</td><td>2010</td><td>-99</td><td>5. Emerging region: G20</td><td>3. Upper middle income</td><td>-99</td><td>null</td><td>AR</td><td>ARG</td><td>32</td><td>32</td><td>AR</td><td>ARG</td><td>-99</td><td>ARG</td><td>ARG</td><td>-99</td><td>-99</td><td>South America</td><td>Americas</td><td>South America</td><td>Latin America & Caribbean</td><td>9</td><td>9</td><td>4</td><td>-99</td><td>1</td></tr><tr><td>1</td><td>Admin-0 country</td><td>6</td><td>Armenia</td><td>ARM</td><td>0</td><td>2</td><td>Sovereign country</td><td>Armenia</td><td>ARM</td><td>0</td><td>Armenia</td><td>ARM</td><td>0</td><td>Armenia</td><td>ARM</td><td>0</td><td>Armenia</td><td>Armenia</td><td>ARM</td><td>Armenia</td><td>null</td><td>Arm.</td><td>ARM</td><td>Republic of Armenia</td><td>null</td><td>null</td><td>null</td><td>Armenia</td><td>null</td><td>3</td><td>1</td><td>2</td><td>10</td><td>2967004</td><td>18770</td><td>-99</td><td>2001</td><td>-99</td><td>6. Developing region</td><td>4. Lower middle income</td><td>-99</td><td>null</td><td>AM</td><td>ARM</td><td>51</td><td>51</td><td>AM</td><td>ARM</td><td>-99</td><td>ARM</td><td>ARM</td><td>-99</td><td>-99</td><td>Asia</td><td>Asia</td><td>Western Asia</td><td>Europe & Central Asia</td><td>7</td><td>7</td><td>4</td><td>-99</td><td>1</td></tr><tr><td>1</td><td>Admin-0 country</td><td>4</td><td>Antarctica</td><td>ATA</td><td>0</td><td>2</td><td>Indeterminate</td><td>Antarctica</td><td>ATA</td><td>0</td><td>Antarctica</td><td>ATA</td><td>0</td><td>Antarctica</td><td>ATA</td><td>0</td><td>Antarctica</td><td>Antarctica</td><td>ATA</td><td>Antarctica</td><td>null</td><td>Ant.</td><td>AQ</td><td>null</td><td>null</td><td>null</td><td>Multiple claims held in abeyance</td><td>Antarctica</td><td>null</td><td>4</td><td>5</td><td>1</td><td>-99</td><td>3802</td><td>760.4</td><td>-99</td><td>-99</td><td>-99</td><td>6. Developing region</td><td>2. High income: nonOECD</td><td>-99</td><td>null</td><td>AQ</td><td>ATA</td><td>10</td><td>-99</td><td>-99</td><td>-99</td><td>-99</td><td>ATA</td><td>ATA</td><td>-99</td><td>-99</td><td>Antarctica</td><td>Antarctica</td><td>Antarctica</td><td>Antarctica</td><td>10</td><td>10</td><td>4</td><td>-99</td><td>1</td></tr></tbody></table>"
+      ]
+     },
+     "execution_count": 36,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "import pl from \"npm:nodejs-polars\";\n",
+    "\n",
+    "let response = await fetch(\n",
+    "  \"https://cdn.jsdelivr.net/npm/world-atlas@1/world/110m.tsv\",\n",
+    ");\n",
+    "let data = await response.text();\n",
+    "let df = pl.readCSV(data, { sep: \"\\t\" });\n",
+    "\n",
+    "df"
+   ]
   }
  ],
  "metadata": {
diff --git a/cli/tests/unit/jupyter_test.ts b/cli/tests/unit/jupyter_test.ts
index 40eaf4623dd94b..f1529adeb7c97d 100644
--- a/cli/tests/unit/jupyter_test.ts
+++ b/cli/tests/unit/jupyter_test.ts
@@ -1,5 +1,9 @@
 // Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
-import { assertThrows } from "./test_util.ts";
+
+import { assertEquals, assertThrows } from "./test_util.ts";
+
+// @ts-expect-error TypeScript (as of 3.7) does not support indexing namespaces by symbol
+const format = Deno[Deno.internal].jupyter.formatInner;
 
 Deno.test("Deno.jupyter is not available", () => {
   assertThrows(
@@ -7,3 +11,69 @@ Deno.test("Deno.jupyter is not available", () => {
     "Deno.jupyter is only available in `deno jupyter` subcommand.",
   );
 });
+
+export async function assertFormattedAs(obj: unknown, result: object) {
+  const formatted = await format(obj);
+  assertEquals(formatted, result);
+}
+
+Deno.test("display(canvas) creates a PNG", async () => {
+  // Let's make a fake Canvas with a fake Data URL
+  class FakeCanvas {
+    toDataURL() {
+      return "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAAXNSR0IArs4c6QAAAARzQklUCAgICHwIZIgAAAAVSURBVAiZY/zPwPCfAQ0woQtQQRAAzqkCCB/D3o0AAAAASUVORK5CYII=";
+    }
+  }
+  const canvas = new FakeCanvas();
+
+  await assertFormattedAs(canvas, {
+    "image/png":
+      "iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAAXNSR0IArs4c6QAAAARzQklUCAgICHwIZIgAAAAVSURBVAiZY/zPwPCfAQ0woQtQQRAAzqkCCB/D3o0AAAAASUVORK5CYII=",
+  });
+});
+
+Deno.test(
+  "class with a Symbol.for('Jupyter.display') function gets displayed",
+  async () => {
+    class Example {
+      x: number;
+
+      constructor(x: number) {
+        this.x = x;
+      }
+
+      [Symbol.for("Jupyter.display")]() {
+        return { "application/json": { x: this.x } };
+      }
+    }
+
+    const example = new Example(5);
+
+    // Now to check on the broadcast call being made
+    await assertFormattedAs(example, { "application/json": { x: 5 } });
+  },
+);
+
+Deno.test(
+  "class with an async Symbol.for('Jupyter.display') function gets displayed",
+  async () => {
+    class Example {
+      x: number;
+
+      constructor(x: number) {
+        this.x = x;
+      }
+
+      async [Symbol.for("Jupyter.display")]() {
+        await new Promise((resolve) => setTimeout(resolve, 0));
+
+        return { "application/json": { x: this.x } };
+      }
+    }
+
+    const example = new Example(3);
+
+    // Now to check on the broadcast call being made
+    await assertFormattedAs(example, { "application/json": { x: 3 } });
+  },
+);
diff --git a/cli/tools/jupyter/server.rs b/cli/tools/jupyter/server.rs
index 2c7bea9d2677c9..6175a33e9f767d 100644
--- a/cli/tools/jupyter/server.rs
+++ b/cli/tools/jupyter/server.rs
@@ -388,21 +388,9 @@ impl JupyterServer {
     } = evaluate_response.value;
 
     if exception_details.is_none() {
-      let output =
-        get_jupyter_display_or_eval_value(&mut self.repl_session, &result)
-          .await?;
-      // Don't bother sending `execute_result` reply if the MIME bundle is empty
-      if !output.is_empty() {
-        msg
-          .new_message("execute_result")
-          .with_content(json!({
-              "execution_count": self.execution_count,
-              "data": output,
-              "metadata": {},
-          }))
-          .send(&mut *self.iopub_socket.lock().await)
-          .await?;
-      }
+      publish_result(&mut self.repl_session, &result, self.execution_count)
+        .await?;
+
       msg
         .new_reply()
         .with_content(json!({
@@ -543,32 +531,33 @@ fn kernel_info() -> serde_json::Value {
   })
 }
 
-async fn get_jupyter_display(
+async fn publish_result(
   session: &mut repl::ReplSession,
   evaluate_result: &cdp::RemoteObject,
+  execution_count: usize,
 ) -> Result<Option<HashMap<String, serde_json::Value>>, AnyError> {
+  let arg0 = cdp::CallArgument {
+    value: Some(serde_json::Value::Number(execution_count.into())),
+    unserializable_value: None,
+    object_id: None,
+  };
+
+  let arg1 = cdp::CallArgument::from(evaluate_result);
+
   let response = session
     .post_message_with_event_loop(
       "Runtime.callFunctionOn",
       Some(json!({
-        "functionDeclaration": r#"async function (object) {
-      if (typeof object[Symbol.for("Jupyter.display")] !== "function") {
-        return null;
-      }
-
-      try {
-        const representation = await object[Symbol.for("Jupyter.display")]();
-        return JSON.stringify(representation);
-      } catch {
-        return null;
-      }
+        "functionDeclaration": r#"async function (execution_count, result) {
+          await Deno[Deno.internal].jupyter.broadcastResult(execution_count, result);
     }"#,
-        "arguments": [cdp::CallArgument::from(evaluate_result)],
+        "arguments": [arg0, arg1],
         "executionContextId": session.context_id,
         "awaitPromise": true,
       })),
     )
     .await?;
+
   let response: cdp::CallFunctionOnResponse = serde_json::from_value(response)?;
 
   if let Some(exception_details) = &response.exception_details {
@@ -578,75 +567,9 @@ async fn get_jupyter_display(
     return Ok(None);
   }
 
-  match response.result.value {
-    Some(serde_json::Value::String(json_str)) => {
-      let Ok(data) =
-        serde_json::from_str::<HashMap<String, serde_json::Value>>(&json_str)
-      else {
-        eprintln!("Unexpected response from Jupyter.display: {json_str}");
-        return Ok(None);
-      };
-
-      if !data.is_empty() {
-        return Ok(Some(data));
-      }
-    }
-    Some(serde_json::Value::Null) => {
-      // Object did not have the Jupyter display spec
-      return Ok(None);
-    }
-    _ => {
-      eprintln!(
-        "Unexpected response from Jupyter.display: {:?}",
-        response.result
-      )
-    }
-  }
-
   Ok(None)
 }
 
-async fn get_jupyter_display_or_eval_value(
-  session: &mut repl::ReplSession,
-  evaluate_result: &cdp::RemoteObject,
-) -> Result<HashMap<String, serde_json::Value>, AnyError> {
-  // Printing "undefined" generates a lot of noise, so let's skip
-  // these.
-  if evaluate_result.kind == "undefined" {
-    return Ok(HashMap::default());
-  }
-
-  // If the response is a primitive value we don't need to try and format
-  // Jupyter response.
-  if evaluate_result.object_id.is_some() {
-    if let Some(data) = get_jupyter_display(session, evaluate_result).await? {
-      return Ok(data);
-    }
-  }
-
-  let response = session
-    .call_function_on_args(
-      format!(
-        r#"function (object) {{
-        try {{
-          return {0}.inspectArgs(["%o", object], {{ colors: !{0}.noColor }});
-        }} catch (err) {{
-          return {0}.inspectArgs(["%o", err]);
-        }}
-      }}"#,
-        *repl::REPL_INTERNALS_NAME
-      ),
-      &[evaluate_result.clone()],
-    )
-    .await?;
-  let mut data = HashMap::default();
-  if let Some(value) = response.result.value {
-    data.insert("text/plain".to_string(), value);
-  }
-
-  Ok(data)
-}
-
 // TODO(bartlomieju): dedup with repl::editor
 fn get_expr_from_line_at_pos(line: &str, cursor_pos: usize) -> &str {
   let start = line[..cursor_pos].rfind(is_word_boundary).unwrap_or(0);
diff --git a/cli/tsc/dts/lib.deno.unstable.d.ts b/cli/tsc/dts/lib.deno.unstable.d.ts
index 26bb78757fe2f5..76e8ef49bc1326 100644
--- a/cli/tsc/dts/lib.deno.unstable.d.ts
+++ b/cli/tsc/dts/lib.deno.unstable.d.ts
@@ -2076,6 +2076,130 @@ declare namespace Deno {
    *
    * @category Jupyter */
   export namespace jupyter {
+    export interface DisplayOptions {
+      raw?: boolean;
+      update?: boolean;
+      display_id?: string;
+    }
+
+    type VegaObject = {
+      $schema: string;
+      [key: string]: unknown;
+    };
+
+    /**
+     * A collection of supported media types and data for Jupyter frontends.
+     */
+    export type MediaBundle = {
+      "text/plain"?: string;
+      "text/html"?: string;
+      "image/svg+xml"?: string;
+      "text/markdown"?: string;
+      "application/javascript"?: string;
+
+      // Images (per Jupyter spec) must be base64 encoded. We could _allow_
+      // accepting Uint8Array or ArrayBuffer within `display` calls, however we still
+      // must encode them for jupyter.
+      "image/png"?: string; // WISH: Uint8Array | ArrayBuffer
+      "image/jpeg"?: string; // WISH: Uint8Array | ArrayBuffer
+      "image/gif"?: string; // WISH: Uint8Array | ArrayBuffer
+      "application/pdf"?: string; // WISH: Uint8Array | ArrayBuffer
+
+      // NOTE: all JSON types must be objects at the top level (no arrays, strings, or other primitives)
+      "application/json"?: object;
+      "application/geo+json"?: object;
+      "application/vdom.v1+json"?: object;
+      "application/vnd.plotly.v1+json"?: object;
+      "application/vnd.vega.v5+json"?: VegaObject;
+      "application/vnd.vegalite.v4+json"?: VegaObject;
+      "application/vnd.vegalite.v5+json"?: VegaObject;
+
+      // Must support a catch all for custom media types / mimetypes
+      [key: string]: string | object | undefined;
+    };
+
+    export const $display: unique symbol;
+
+    export type Displayable = {
+      [$display]: () => MediaBundle | Promise<MediaBundle>;
+    };
+
+    /**
+     * Display function for Jupyter Deno Kernel.
+     * Mimics the behavior of IPython's `display(obj, raw=True)` function to allow
+     * asynchronous displaying of objects in Jupyter.
+     *
+     * @param obj - The object to be displayed
+     * @param options - Display options with a default { raw: true }
+     */
+    export function display(obj: unknown, options?: DisplayOptions): void;
+
+    /**
+     * Show Markdown in Jupyter frontends with a tagged template function.
+     *
+     * Takes a template string and returns a displayable object for Jupyter frontends.
+     *
+     * @example
+     * Create a Markdown view.
+     *
+     * ```typescript
+     * const { md } = Deno.jupyter;
+     * md`# Notebooks in TypeScript via Deno ![Deno logo](https://github.com/denoland.png?size=32)
+     *
+     * * TypeScript ${Deno.version.typescript}
+     * * V8 ${Deno.version.v8}
+     * * Deno ${Deno.version.deno}
+     *
+     * Interactive compute with Jupyter _built into Deno_!
+     * `
+     * ```
+     */
+    export function md(
+      strings: TemplateStringsArray,
+      ...values: unknown[]
+    ): Displayable;
+
+    /**
+     * Show HTML in Jupyter frontends with a tagged template function.
+     *
+     * Takes a template string and returns a displayable object for Jupyter frontends.
+     *
+     * @example
+     * Create an HTML view.
+     * ```typescript
+     * const { html } = Deno.jupyter;
+     * html`<h1>Hello, world!</h1>`
+     * ```
+     */
+    export function html(
+      strings: TemplateStringsArray,
+      ...values: unknown[]
+    ): Displayable;
+
+    /**
+     * SVG Tagged Template Function.
+     *
+     * Takes a template string and returns a displayable object for Jupyter frontends.
+     *
+     * Example usage:
+     *
+     * svg`<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+     *      <circle cx="50" cy="50" r="40" stroke="green" stroke-width="4" fill="yellow" />
+     *    </svg>`
+     */
+    export function svg(
+      strings: TemplateStringsArray,
+      ...values: unknown[]
+    ): Displayable;
+
+    /**
+     * Format an object for displaying in Deno
+     *
+     * @param obj - The object to be displayed
+     * @returns MediaBundle
+     */
+    export function format(obj: unknown): MediaBundle;
+
     /**
      * Broadcast a message on IO pub channel.
      *