detect-is-it-html-or-xhtml/README.md

Does the string resemble an HTML or XHTML (or neither)?

<h1 align="center">detect-is-it-html-or-xhtml</h1>

<p align="center">Does the string resemble an HTML or XHTML (or neither)?</p>

<p align="center">
  <a href="https://codsen.com/os/detect-is-it-html-or-xhtml" rel="nofollow noreferrer noopener">
    <img src="https://img.shields.io/badge/-codsen-blue?style=flat-square" alt="page on codsen.com">
  </a>
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    <img src="https://img.shields.io/badge/-npm-blue?style=flat-square" alt="page on npm">
  </a>
  <a href="https://github.com/codsen/codsen/tree/main/packages/detect-is-it-html-or-xhtml" rel="nofollow noreferrer noopener">
    <img src="https://img.shields.io/badge/-github-blue?style=flat-square" alt="page on github">
  </a>
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    <img src="https://img.shields.io/npm/dm/detect-is-it-html-or-xhtml.svg?style=flat-square" alt="Downloads per month">
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  <a href="https://codsen.com/os/detect-is-it-html-or-xhtml/changelog" rel="nofollow noreferrer noopener">
    <img src="https://img.shields.io/badge/changelog-here-brightgreen?style=flat-square" alt="changelog">
  </a>
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</p>

## Install

This package is [pure ESM](https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c). If you're not ready yet, install an older version of this program, 4.1.0 (`npm i detect-is-it-html-or-xhtml@4.1.0`).

```bash
npm i detect-is-it-html-or-xhtml
```

## Quick Take

```js
import { strict as assert } from "assert";

import { detectIsItHTMLOrXhtml } from "detect-is-it-html-or-xhtml";

assert.equal(
  detectIsItHTMLOrXhtml(
    '<img src="some.jpg" width="zzz" height="zzz" border="0" style="display:block;" alt="zzz"/>',
  ),
  "xhtml",
);
```

## Documentation

Please [visit codsen.com](https://codsen.com/os/detect-is-it-html-or-xhtml/) for a full description of the API. If you’re looking for the **Changelog**, it’s [here](https://github.com/codsen/codsen/blob/main/packages/detect-is-it-html-or-xhtml/CHANGELOG.md).

## Contributing

To report bugs or request features or assistance, [raise an issue](https://github.com/codsen/codsen/issues/new/choose) on GitHub.

## Licence

MIT License

Copyright © 2010-2025 Roy Revelt and other contributors

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