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mathml-to-latex

★ 81 Open GitHub ↗

A JavaScript tool to convert mathml string to LaTeX equation string.

// repository documentation

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# mathml-to-latex

It converts [MathML](https://en.wikipedia.org/wiki/MathML) to [LaTeX](https://pt.wikipedia.org/wiki/LaTeX).

## Installation

If you use NPM

```
npm install mathml-to-latex --save
```

If you use Yarn

```
yarn add mathml-to-latex
```

## Usage

```javascript
import { MathMLToLaTeX } from 'mathml-to-latex';
// const { MathMLToLaTeX } = require('mathml-to-latex');

const mathml = `
      <math>
        <mrow>
          <mn>a</mn>
          <mo>+</mo>
          <mn>b</mn>
        </mrow>
      </math>
      `;

MathMLToLaTeX.convert(mathml);
// => a + b
```

```javascript
import { MathMLToLaTeX } from 'mathml-to-latex';
// const { MathMLToLaTeX } = require('mathml-to-latex');

const mathml = `
    <math>
        <mrow>
            <mi>A</mi>
            <mo>=</mo>
            <mfenced open = "[" close="]">
            <mtable>
                <mtr>
                <mtd><mi>x</mi></mtd>
                <mtd><mi>y</mi></mtd>
                </mtr>
                <mtr>
                <mtd><mi>z</mi></mtd>
                <mtd><mi>w</mi></mtd>
                </mtr>
            </mtable>
            </mfenced>
        </mrow>
    </math>
    `;

MathMLToLaTeX.convert(mathml);
// => A = \begin{bmatrix} x & y \\ z & w \end{bmatrix}
```

## Module formats

The package ships in three formats, so it works the same in modern bundlers, Node and the browser. TypeScript declarations are bundled in, so no extra `@types` package is needed.

- **ES Modules** — for bundlers (webpack, Vite, Rollup…) and modern Node:

```javascript
  import { MathMLToLaTeX } from 'mathml-to-latex';
  ```

- **CommonJS** — for Node's `require`:

```javascript
  const { MathMLToLaTeX } = require('mathml-to-latex');
  ```

- **UMD** — a self-contained, minified bundle for direct use in the browser via a `<script>` tag / CDN (see [Browser](#browser) below).

The right format is selected automatically through the package's `exports` map.

## Browser

Package is also available directly in the browser through CDN:

```html
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>MathML to LaTeX Converter</title>
    
    <link href="https://cdn.jsdelivr.net/npm/tailwindcss@2.2.15/dist/tailwind.min.css" rel="stylesheet" />
    
    <script src="https://cdn.jsdelivr.net/npm/mathml-to-latex@1.5.0/dist/bundle.min.js"></script>
  </head>
  <body class="bg-blue-50 h-screen flex flex-col items-center justify-center">
    <h1 class="text-2xl font-bold mb-4">MathML to LaTeX Converter</h1>
    <div class="w-3/4 flex flex-row gap-6">
      <div class="flex flex-col w-1/2">
        <textarea id="mathmlInput" class="p-4 w-full h-64 border rounded shadow-md"></textarea>
        <button
          id="convertButton"
          class="mt-4 px-4 py-2 bg-blue-500 text-white rounded hover:bg-blue-600 focus:outline-none"
        >
          Convert to LaTeX
        </button>
      </div>
      <div class="w-1/2 bg-white p-4 border rounded shadow-md">
        <p id="latexOutput"></p>
      </div>
    </div>

mathmlInput.value = `\
<math>
    <mrow>
        <mn>2</mn>
        <mo>+</mo>
        <mn>2</mn>
        <mo>=</mo>
        <mn>4</mn>
    </mrow>
</math>`;

convertButton.addEventListener('click', function () {
        const latex = MathMLToLaTeX.MathMLToLaTeX.convert(mathmlInput.value);
        latexOutput.textContent = latex;
      });
    </script>
  </body>
</html>
```

Output:

![Browser DEMO](https://raw.githubusercontent.com/asnunes/mathml-to-latex/main/docs/browser-demo.gif)

mathml-to-latex

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