Refactor to move implementation to lib/

index.js

@@ -1,103 +1,5 @@
 /**
- * @typedef {import('unist').Parent} Parent
- * @typedef {import('unist').Node} Node
- *
- * @typedef ProxyFields
- * @property {Parent|null} parent
- * Parent link (or `null` for the root).
- * @property {Node} node
- * Link to the original node
- *
- * @typedef {Node & ProxyFields} Proxy
- * Proxied node
+ * @typedef {import('./lib/index.js').Proxy} Proxy
  */
 
-/** @type {WeakMap<Node, Proxy>} */
-const cache = new WeakMap()
-
-/**
- * @param {Node} node
- * Create a proxy of `node` that acts like the original tree upon reading, but
- * each proxied node has a reference to its parent node.
- * @returns {Proxy}
- * Proxy of `node`.
- */
-export function parents(node) {
- return wrapNode(node, null)
-}
-
-/**
- * @param {Node} node
- * Node to wrap.
- * @param {Parent|null} parent
- * Parent of `node`.
- * @returns {Proxy}
- * Proxy of `node`.
- */
-function wrapNode(node, parent) {
- const entry = cache.get(node)
-
- if (entry) {
- return entry
- }
-
- /** @type {Proxy} */
- const proxy = {}
- /** @type {string} */
- let key
-
- for (key in node) {
- if (key !== 'children') {
- // @ts-expect-error: indexable.
- proxy[key] = node[key]
- }
- }
-
- Object.defineProperty(proxy, 'node', {
- writable: true,
- configurable: true,
- value: node
- })
-
- Object.defineProperty(proxy, 'parent', {
- configurable: true,
- get: getParent,
- set: setParent
- })
-
- if ('children' in node) {
- Object.defineProperty(proxy, 'children', {
- enumerable: true,
- configurable: true,
- get: getChildren
- })
- }
-
- cache.set(node, proxy)
-
- return proxy
-
- /**
- * Get the `parent` reference of a proxied node.
- */
- function getParent() {
- return parent
- }
-
- /**
- * Set the `parent` reference of a proxied node.
- *
- * @param {Parent} newParent
- */
- function setParent(newParent) {
- parent = newParent
- }
-
- /**
- * Get the wrapped children of a proxied node.
- */
- function getChildren() {
- // @ts-expect-error `node` is a parent.
- return node.children.map((/** @type {Node} */ c) => wrapNode(c, proxy))
- }
-}
+export {parents} from './lib/index.js'

lib/index.js

@@ -0,0 +1,103 @@
+/**
+ * @typedef {import('unist').Parent} Parent
+ * @typedef {import('unist').Node} Node
+ *
+ * @typedef ProxyFields
+ * @property {Parent|null} parent
+ * Parent link (or `null` for the root).
+ * @property {Node} node
+ * Link to the original node
+ *
+ * @typedef {Node & ProxyFields} Proxy
+ * Proxied node
+ */
+
+/** @type {WeakMap<Node, Proxy>} */
+const cache = new WeakMap()
+
+/**
+ * @param {Node} node
+ * Create a proxy of `node` that acts like the original tree upon reading, but
+ * each proxied node has a reference to its parent node.
+ * @returns {Proxy}
+ * Proxy of `node`.
+ */
+export function parents(node) {
+ return wrapNode(node, null)
+}
+
+/**
+ * @param {Node} node
+ * Node to wrap.
+ * @param {Parent|null} parent
+ * Parent of `node`.
+ * @returns {Proxy}
+ * Proxy of `node`.
+ */
+function wrapNode(node, parent) {
+ const entry = cache.get(node)
+
+ if (entry) {
+ return entry
+ }
+
+ /** @type {Proxy} */
+ const proxy = {}
+ /** @type {string} */
+ let key
+
+ for (key in node) {
+ if (key !== 'children') {
+ // @ts-expect-error: indexable.
+ proxy[key] = node[key]
+ }
+ }
+
+ Object.defineProperty(proxy, 'node', {
+ writable: true,
+ configurable: true,
+ value: node
+ })
+
+ Object.defineProperty(proxy, 'parent', {
+ configurable: true,
+ get: getParent,
+ set: setParent
+ })
+
+ if ('children' in node) {
+ Object.defineProperty(proxy, 'children', {
+ enumerable: true,
+ configurable: true,
+ get: getChildren
+ })
+ }
+
+ cache.set(node, proxy)
+
+ return proxy
+
+ /**
+ * Get the `parent` reference of a proxied node.
+ */
+ function getParent() {
+ return parent
+ }
+
+ /**
+ * Set the `parent` reference of a proxied node.
+ *
+ * @param {Parent} newParent
+ */
+ function setParent(newParent) {
+ parent = newParent
+ }
+
+ /**
+ * Get the wrapped children of a proxied node.
+ */
+ function getChildren() {
+ // @ts-expect-error `node` is a parent.
+ return node.children.map((/** @type {Node} */ c) => wrapNode(c, proxy))
+ }
+}

package.json

@@ -32,6 +32,7 @@
  "main": "index.js",
  "types": "index.d.ts",
  "files": [
+ "lib/",
  "index.d.ts",
  "index.js"
  ],