Excelize-wasm is a pure WebAssembly / Javascript port of Go Excelize library that allow you to write to and read from XLAM / XLSM / XLSX / XLTM / XLTX files. Supports reading and writing spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports complex components by high compatibility. The full API docs can be found at docs reference.
| Browser | Version |
|---|---|
| Chrome | ≥57 |
| Chrome for Android and Android Browser | ≥105 |
| Edge | ≥16 |
| Safari on macOS and iOS | ≥11 |
| Firefox | ≥52 |
| Firefox for Android | ≥104 |
| Opera | ≥44 |
| Opera Mobile | ≥64 |
| Samsung Internet | ≥7.2 |
| UC Browser for Android | ≥13.4 |
| QQ Browser | ≥10.4 |
| Node.js | ≥8.0.0 |
| Deno | ≥1.0 |
npm install --save excelize-wasm<script src="excelize-wasm/index.js"></script>Here is a minimal example usage that will create spreadsheet file.
const { init } = require("excelize-wasm");
const fs = require("fs");
init("./node_modules/excelize-wasm/excelize.wasm.gz").then((excelize) => {
const f = excelize.NewFile();
// Create a new sheet.
const { index } = f.NewSheet("Sheet2")
// Set value of a cell.
f.SetCellValue("Sheet2", "A2", "Hello world.")
f.SetCellValue("Sheet1", "B2", 100)
// Set active sheet of the workbook.
f.SetActiveSheet(index)
// Save spreadsheet by the given path.
const { buffer, error } = f.WriteToBuffer();
if (error) {
console.log(error);
return
}
fs.writeFile("Book1.xlsx", buffer, "binary", (error) => {
if (error) {
console.log(error);
}
});
});Create spreadsheet in browser:
View code
<html>
<head>
<meta charset="utf-8">
<script src="https://<your_hostname>/excelize-wasm/index.js"></script>
</head>
<body>
<div>
<button onclick="download()">Download</button>
</div>
<script>
function download() {
excelizeWASM.init("https://<your_hostname>/excelize-wasm/excelize.wasm.gz").then((excelize) => {
const f = excelize.NewFile();
// Create a new sheet.
const { index } = f.NewSheet("Sheet2")
// Set value of a cell.
f.SetCellValue("Sheet2", "A2", "Hello world.")
f.SetCellValue("Sheet1", "B2", 100)
// Set active sheet of the workbook.
f.SetActiveSheet(index)
// Save spreadsheet by the given path.
const { buffer, error } = f.WriteToBuffer();
if (error) {
console.log(error);
return
}
const link = document.createElement("a");
link.download = "Book1.xlsx";
link.href = URL.createObjectURL(
new Blob([buffer],
{ type: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" })
);
link.click();
});
}
</script>
</body>The following constitutes the bare to read a spreadsheet document.
const { init } = require("excelize-wasm");
const fs = require("fs");
init("./node_modules/excelize-wasm/excelize.wasm.gz").then((excelize) => {
const f = excelize.OpenReader(fs.readFileSync("Book1.xlsx"));
// Set value of a cell.
var { value, error } = f.GetCellValue("Sheet1", "B2")
if (error) {
console.log(error);
return;
}
console.log(value)
// Get all the rows in the Sheet1.
var { result, error } = f.GetRows("Sheet1");
if (error) {
console.log(error);
return;
}
result.forEach(row => {
row.forEach(colCell => {
process.stdout.write(`${colCell}\t`)
})
console.log();
});
});With excelize-wasm chart generation and management is as easy as a few lines of code. You can build charts based on data in your worksheet or generate charts without any data in your worksheet at all.
const { init } = require("excelize-wasm");
const fs = require("fs");
init("./node_modules/excelize-wasm/excelize.wasm.gz").then((excelize) => {
const f = excelize.NewFile();
[
[null, "Apple", "Orange", "Pear"],
["Small", 2, 3, 3],
["Normal", 5, 2, 4],
["Large", 6, 7, 8],
].forEach((row, idx) => {
var { cell, error } = excelize.CoordinatesToCellName(1, idx + 1);
if (error) {
console.log(error);
return;
}
var { error } = f.SetSheetRow("Sheet1", cell, row);
if (error) {
console.log(error);
return;
}
});
var { error } = f.AddChart("Sheet1", "E1", {
Type: "col3DClustered",
Series: [
{
Name: "Sheet1!$A$2",
Categories: "Sheet1!$B$1:$D$1",
Values: "Sheet1!$B$2:$D$2",
},
{
Name: "Sheet1!$A$3",
Categories: "Sheet1!$B$1:$D$1",
Values: "Sheet1!$B$3:$D$3",
},
{
Name: "Sheet1!$A$4",
Categories: "Sheet1!$B$1:$D$1",
Values: "Sheet1!$B$4:$D$4",
},
],
Title: {
Name: "Fruit 3D Clustered Column Chart",
},
});
if (error) {
console.log(error);
return;
}
// Save spreadsheet by the given path.
var { buffer, error } = f.WriteToBuffer();
if (error) {
console.log(error);
return;
}
fs.writeFile("Book1.xlsx", buffer, "binary", (error) => {
if (error) {
console.log(error);
}
});
});const { init } = require("excelize-wasm");
const fs = require("fs");
init("./node_modules/excelize-wasm/excelize.wasm.gz").then((excelize) => {
const f = excelize.OpenReader(fs.readFileSync("Book1.xlsx"));
if (f.error) {
console.log(f.error);
return
}
// Insert a picture.
var { error } = f.AddPictureFromBytes("Sheet1", "A2",
"Picture 1", ".png", fs.readFileSync("image.png"), {})
if (error) {
console.log(error);
return
}
// Insert a picture to worksheet with scaling.
var { error } = f.AddPictureFromBytes("Sheet1", "D2", "Picture 2", ".png",
fs.readFileSync("image.jpg"), {ScaleX: 0.5, ScaleY: 0.5});
if (error) {
console.log(error);
return
}
// Insert a picture offset in the cell with printing support.
var { error } = f.AddPictureFromBytes("Sheet1", "H2", "Picture 3", ".png",
fs.readFileSync("image.gif"), {
OffsetX: 15,
OffsetY: 10,
PrintObject: true,
LockAspectRatio: false,
Locked: false
});
if (error) {
console.log(error);
return
}
// Save spreadsheet by the given path.
var { buffer, error } = f.WriteToBuffer();
if (error) {
console.log(error);
return
}
fs.writeFile("Book1.xlsx", buffer, "binary", (error) => {
if (error) {
console.log(error);
}
});
});Contributions are welcome! Open a pull request to fix a bug, or open an issue to discuss a new feature or change.
This program is under the terms of the BSD 3-Clause License. See https://opensource.org/licenses/BSD-3-Clause.
The Excel logo is a trademark of Microsoft Corporation. This artwork is an adaptation.
gopher.{ai,svg,png} was created by Takuya Ueda. Licensed under the Creative Commons 3.0 Attributions license.