# html-react-parser

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HTML to React parser that works on both the server (Node.js) and the client (browser):

```
HTMLReactParser(string[, options])
```

The parser converts an HTML string to one or more [React elements](https://reactjs.org/docs/react-api.html#creating-react-elements).

To replace an element with another element, check out the [`replace`](#replace) option.

#### Example

```js
const parse = require('html-react-parser');
parse('<p>Hello, World!</p>'); // React.createElement('p', {}, 'Hello, World!')
```

[Replit](https://replit.com/@remarkablemark/html-react-parser) | [JSFiddle](https://jsfiddle.net/remarkablemark/7v86d800/) | [CodeSandbox](https://codesandbox.io/s/940pov1l4w) | [TypeScript](https://codesandbox.io/s/html-react-parser-z0kp6) | [Examples](https://github.com/remarkablemark/html-react-parser/tree/master/examples)

<details>
<summary>Table of Contents</summary>

- [Install](#install)
- [Usage](#usage)
  - [replace](#replace)
    - [replace with TypeScript](#replace-with-typescript)
    - [replace element and children](#replace-element-and-children)
    - [replace element attributes](#replace-element-attributes)
    - [replace and remove element](#replace-and-remove-element)
  - [library](#library)
  - [htmlparser2](#htmlparser2)
  - [trim](#trim)
- [Migration](#migration)
  - [v3.0.0](#v300)
  - [v2.0.0](#v200)
  - [v1.0.0](#v100)
- [FAQ](#faq)
  - [Is this XSS safe?](#is-this-xss-safe)
  - [Does invalid HTML get sanitized?](#does-invalid-html-get-sanitized)
  - [Are `<script>` tags parsed?](#are-script-tags-parsed)
  - [Attributes aren't getting called](#attributes-arent-getting-called)
  - [Parser throws an error](#parser-throws-an-error)
  - [Is SSR supported?](#is-ssr-supported)
  - [Elements aren't nested correctly](#elements-arent-nested-correctly)
  - [Don't change case of tags](#dont-change-case-of-tags)
  - [TS Error: Property 'attribs' does not exist on type 'DOMNode'](#ts-error-property-attribs-does-not-exist-on-type-domnode)
  - [Can I enable `trim` for certain elements?](#can-i-enable-trim-for-certain-elements)
  - [Webpack build warnings](#webpack-build-warnings)
  - [TypeScript error](#typescript-error)
- [Performance](#performance)
- [Contributors](#contributors)
  - [Code Contributors](#code-contributors)
  - [Financial Contributors](#financial-contributors)
    - [Individuals](#individuals)
    - [Organizations](#organizations)
- [Enterprise](#enterprise)
- [Support](#support)
- [License](#license)

</details>

## Install

[NPM](https://www.npmjs.com/package/html-react-parser):

```sh
npm install html-react-parser --save
```

[Yarn](https://yarnpkg.com/package/html-react-parser):

```sh
yarn add html-react-parser
```

[CDN](https://unpkg.com/html-react-parser/):

```html
<!-- HTMLReactParser depends on React -->
<script src="https://unpkg.com/react@18/umd/react.production.min.js"></script>
<script src="https://unpkg.com/html-react-parser@latest/dist/html-react-parser.min.js"></script>
<script>
  window.HTMLReactParser(/* string */);
</script>
```

## Usage

Import or require the module:

```js
// ES Modules
import parse from 'html-react-parser';

// CommonJS
const parse = require('html-react-parser');
```

Parse single element:

```js
parse('<h1>single</h1>');
```

Parse multiple elements:

```js
parse('<li>Item 1</li><li>Item 2</li>');
```

Make sure to render parsed adjacent elements under a parent element:

```jsx
<ul>
  {parse(`
    <li>Item 1</li>
    <li>Item 2</li>
  `)}
</ul>
```

Parse nested elements:

```js
parse('<body><p>Lorem ipsum</p></body>');
```

Parse element with attributes:

```js
parse(
  '<hr id="foo" class="bar" data-attr="baz" custom="qux" style="top:42px;">'
);
```

### replace

The `replace` option allows you to replace an element with another element.

The `replace` callback's first argument is [domhandler](https://github.com/fb55/domhandler#example)'s node:

```js
parse('<br>', {
  replace: domNode => {
    console.dir(domNode, { depth: null });
  }
});
```

Console output:

```js
Element {
  type: 'tag',
  parent: null,
  prev: null,
  next: null,
  startIndex: null,
  endIndex: null,
  children: [],
  name: 'br',
  attribs: {}
}
```

The element is replaced if a **valid** React element is returned:

```jsx
parse('<p id="replace">text</p>', {
  replace: domNode => {
    if (domNode.attribs && domNode.attribs.id === 'replace') {
      return <span>replaced</span>;
    }
  }
});
```

#### replace with TypeScript

For TypeScript projects, you may need to check that `domNode` is an instance of domhandler's `Element`:

```tsx
import { HTMLReactParserOptions, Element } from 'html-react-parser';

const options: HTMLReactParserOptions = {
  replace: domNode => {
    if (domNode instanceof Element && domNode.attribs) {
      // ...
    }
  }
};
```

If you're having issues take a look at our [Create React App example](./examples/create-react-app-typescript/src/App.tsx).

#### replace element and children

Replace the element and its children (see [demo](https://replit.com/@remarkablemark/html-react-parser-replace-example)):

```jsx
import parse, { domToReact } from 'html-react-parser';

const html = `
  <p id="main">
    <span class="prettify">
      keep me and make me pretty!
    </span>
  </p>
`;

const options = {
  replace: ({ attribs, children }) => {
    if (!attribs) {
      return;
    }

    if (attribs.id === 'main') {
      return <h1 style={{ fontSize: 42 }}>{domToReact(children, options)}</h1>;
    }

    if (attribs.class === 'prettify') {
      return (
        <span style={{ color: 'hotpink' }}>
          {domToReact(children, options)}
        </span>
      );
    }
  }
};

parse(html, options);
```

HTML output:

<!-- prettier-ignore-start -->

```html
<h1 style="font-size:42px">
  <span style="color:hotpink">
    keep me and make me pretty!
  </span>
</h1>
```

<!-- prettier-ignore-end -->

#### replace element attributes

Convert DOM attributes to React props with `attributesToProps`:

```jsx
import parse, { attributesToProps } from 'html-react-parser';

const html = `
  <main class="prettify" style="background: #fff; text-align: center;" />
`;

const options = {
  replace: domNode => {
    if (domNode.attribs && domNode.name === 'main') {
      const props = attributesToProps(domNode.attribs);
      return <div {...props} />;
    }
  }
};

parse(html, options);
```

HTML output:

```html
<div class="prettify" style="background:#fff;text-align:center"></div>
```

#### replace and remove element

[Exclude](https://replit.com/@remarkablemark/html-react-parser-56) an element from rendering by replacing it with `<React.Fragment>`:

```jsx
parse('<p><br id="remove"></p>', {
  replace: ({ attribs }) => attribs && attribs.id === 'remove' && <></>
});
```

HTML output:

```html
<p></p>
```

### library

The `library` option specifies the UI library. The default library is **React**.

To use Preact:

```js
parse('<br>', {
  library: require('preact')
});
```

Or a custom library:

```js
parse('<br>', {
  library: {
    cloneElement: () => {
      /* ... */
    },
    createElement: () => {
      /* ... */
    },
    isValidElement: () => {
      /* ... */
    }
  }
});
```

### htmlparser2

> **Warning**: `htmlparser2` options _**do not** work on the client-side_ (browser) and the options _**only work** on the server-side_ (Node.js). By overriding the options, it could cause universal rendering to break.

Default [htmlparser2 options](https://github.com/fb55/htmlparser2/wiki/Parser-options#option-xmlmode) can be overridden in >=[0.12.0](https://github.com/remarkablemark/html-react-parser/tree/v0.12.0).

To enable [`xmlMode`](https://github.com/fb55/htmlparser2/wiki/Parser-options#option-xmlmode):

```js
parse('<p /><p />', {
  htmlparser2: {
    xmlMode: true
  }
});
```

### trim

By default, whitespace is preserved:

```js
parse('<br>\n'); // [React.createElement('br'), '\n']
```

But certain elements like `<table>` will strip out invalid whitespace:

```js
parse('<table>\n</table>'); // React.createElement('table')
```

To remove whitespace, enable the `trim` option:

```js
parse('<br>\n', { trim: true }); // React.createElement('br')
```

However, intentional whitespace may be stripped out:

```js
parse('<p> </p>', { trim: true }); // React.createElement('p')
```

## Migration

### v3.0.0

[domhandler](https://github.com/fb55/domhandler) has been upgraded to v5 so some [parser options](https://github.com/fb55/htmlparser2/wiki/Parser-options) like `normalizeWhitespace` have been removed.

Also, it's recommended to upgrade to the latest version of [typescript](https://www.npmjs.com/package/typescript).

### v2.0.0

Since [v2.0.0](https://github.com/remarkablemark/html-react-parser/releases/tag/v2.0.0), Internet Explorer (IE) is no longer supported.

### v1.0.0

TypeScript projects will need to update the types in [v1.0.0](https://github.com/remarkablemark/html-react-parser/releases/tag/v1.0.0).

For the `replace` option, you may need to do the following:

```tsx
import { Element } from 'domhandler/lib/node';

parse('<br class="remove">', {
  replace: domNode => {
    if (domNode instanceof Element && domNode.attribs.class === 'remove') {
      return <></>;
    }
  }
});
```

Since [v1.1.1](https://github.com/remarkablemark/html-react-parser/releases/tag/v1.1.1), Internet Explorer 9 (IE9) is no longer supported.

## FAQ

### Is this XSS safe?

No, this library is _**not**_ [XSS (cross-site scripting)](https://wikipedia.org/wiki/Cross-site_scripting) safe. See [#94](https://github.com/remarkablemark/html-react-parser/issues/94).

### Does invalid HTML get sanitized?

No, this library does _**not**_ sanitize HTML. See [#124](https://github.com/remarkablemark/html-react-parser/issues/124), [#125](https://github.com/remarkablemark/html-react-parser/issues/125), and [#141](https://github.com/remarkablemark/html-react-parser/issues/141).

### Are `<script>` tags parsed?

Although `<script>` tags and their contents are rendered on the server-side, they're not evaluated on the client-side. See [#98](https://github.com/remarkablemark/html-react-parser/issues/98).

### Attributes aren't getting called

The reason why your HTML attributes aren't getting called is because [inline event handlers](https://developer.mozilla.org/docs/Web/Guide/Events/Event_handlers) (e.g., `onclick`) are parsed as a _string_ rather than a _function_. See [#73](https://github.com/remarkablemark/html-react-parser/issues/73).

### Parser throws an error

If the parser throws an error, check if your arguments are valid. See ["Does invalid HTML get sanitized?"](#does-invalid-html-get-sanitized).

### Is SSR supported?

Yes, server-side rendering on Node.js is supported by this library. See [demo](https://replit.com/@remarkablemark/html-react-parser-SSR).

### Elements aren't nested correctly

If your elements are nested incorrectly, check to make sure your [HTML markup is valid](https://validator.w3.org/). The HTML to DOM parsing will be affected if you're using self-closing syntax (`/>`) on non-void elements:

```js
parse('<div /><div />'); // returns single element instead of array of elements
```

See [#158](https://github.com/remarkablemark/html-react-parser/issues/158).

### Don't change case of tags

Tags are lowercased by default. To prevent that from happening, pass the [htmlparser2 option](#htmlparser2):

```js
const options = {
  htmlparser2: {
    lowerCaseTags: false
  }
};
parse('<CustomElement>', options); // React.createElement('CustomElement')
```

> **Warning**: By preserving case-sensitivity of the tags, you may get rendering warnings like:
>
> ```
> Warning: <CustomElement> is using incorrect casing. Use PascalCase for React components, or lowercase for HTML elements.
> ```

See [#62](https://github.com/remarkablemark/html-react-parser/issues/62) and [example](https://replit.com/@remarkablemark/html-react-parser-62).

### TS Error: Property 'attribs' does not exist on type 'DOMNode'

The TypeScript error occurs because `DOMNode` needs to be an instance of domhandler's `Element`. See [migration](#migration) or [#199](https://github.com/remarkablemark/html-react-parser/issues/199).

### Can I enable `trim` for certain elements?

Yes, you can enable or disable [`trim`](#trim) for certain elements using the [`replace`](#replace) option. See [#205](https://github.com/remarkablemark/html-react-parser/issues/205).

### Webpack build warnings

If you see the Webpack build warning:

```
export 'default' (imported as 'parse') was not found in 'html-react-parser'
```

Then update your Webpack config to:

```js
// webpack.config.js
module.exports = {
  // ...
  resolve: {
    mainFields: ['browser', 'main', 'module']
  }
};
```

See [#238](https://github.com/remarkablemark/html-react-parser/issues/238) and [#213](https://github.com/remarkablemark/html-react-parser/issues/213).

### TypeScript error

If you see the TypeScript error:

```
node_modules/htmlparser2/lib/index.d.ts:2:23 - error TS1005: ',' expected.

2 export { Parser, type ParserOptions };
                         ~~~~~~~~~~~~~
```

Then upgrade to the latest version of [typescript](https://www.npmjs.com/package/typescript). See [#748](https://github.com/remarkablemark/html-react-parser/issues/748).

## Performance

Run benchmark:

```sh
npm run test:benchmark
```

Output of benchmark run on MacBook Pro 2017:

```
html-to-react - Single x 415,186 ops/sec ±0.92% (85 runs sampled)
html-to-react - Multiple x 139,780 ops/sec ±2.32% (87 runs sampled)
html-to-react - Complex x 8,118 ops/sec ±2.99% (82 runs sampled)
```

Run [Size Limit](https://github.com/ai/size-limit):

```sh
npx size-limit
```

## Contributors

### Code Contributors

This project exists thanks to all the people who contribute. [[Contribute](https://github.com/remarkablemark/html-react-parser/blob/master/.github/CONTRIBUTING.md)].

[![Code Contributors](https://opencollective.com/html-react-parser/contributors.svg?width=890&button=false)](https://github.com/remarkablemark/html-react-parser/graphs/contributors)

### Financial Contributors

Become a financial contributor and help us sustain our community. [[Contribute](https://opencollective.com/html-react-parser/contribute)]

#### Individuals

[![Financial Contributors - Individuals](https://opencollective.com/html-react-parser/individuals.svg?width=890)](https://opencollective.com/html-react-parser)

#### Organizations

Support this project with your organization. Your logo will show up here with a link to your website. [[Contribute](https://opencollective.com/html-react-parser/contribute)]

[![Financial Contributors - Organization 0](https://opencollective.com/html-react-parser/organization/0/avatar.svg)](https://opencollective.com/html-react-parser/organization/0/website)
[![Financial Contributors - Organization 1](https://opencollective.com/html-react-parser/organization/1/avatar.svg)](https://opencollective.com/html-react-parser/organization/1/website)
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## Enterprise

Available as part of the Tidelift Subscription.

The maintainers of html-react-parser and thousands of other packages are working with Tidelift to deliver commercial support and maintenance for the open source packages you use to build your applications. Save time, reduce risk, and improve code health, while paying the maintainers of the exact packages you use. [Learn more.](https://tidelift.com/subscription/pkg/npm-html-react-parser?utm_source=npm-html-react-parser&utm_medium=referral&utm_campaign=enterprise&utm_term=repo)

## Support

- [GitHub Sponsors](https://b.remarkabl.org/github-sponsors)
- [Open Collective](https://b.remarkabl.org/open-collective-html-react-parser)
- [Tidelift](https://b.remarkabl.org/tidelift-html-react-parser)
- [Patreon](https://b.remarkabl.org/patreon)
- [Ko-fi](https://b.remarkabl.org/ko-fi)
- [Liberapay](https://b.remarkabl.org/liberapay)
- [Teepsring](https://b.remarkabl.org/teespring)

## License

[MIT](https://github.com/remarkablemark/html-react-parser/blob/master/LICENSE)
