html-react-parser
Advanced tools
The html-react-parser package is designed to convert HTML strings into React components. This is particularly useful when you need to dynamically render HTML content in a React application, such as content fetched from a CMS or API that returns HTML. It allows for custom handling of elements, attributes, and can work with server-side rendering.
Parsing HTML strings to React Elements
This feature allows you to convert a string of HTML into React elements that can be rendered inside a React component.
import parse from 'html-react-parser';
const html = '<div>Hello World</div>';
const reactElement = parse(html);Replacing or modifying elements during parsing
This feature allows you to define a 'replace' function in the options object that can modify or replace elements during the parsing process.
import parse, { domToReact } from 'html-react-parser';
const html = '<p id="replace">Replace me</p>';
const options = {
replace: ({ attribs, children }) => {
if (attribs && attribs.id === 'replace') {
return <span>{domToReact(children)}</span>;
}
}
};
const reactElement = parse(html, options);Preserving custom attributes and event handlers
This feature allows you to preserve custom attributes and potentially event handlers when parsing HTML to React elements.
import parse from 'html-react-parser';
const html = '<div onclick="handleClick()">Click me</div>';
const reactElement = parse(html, {
preserveAttributes: ['onclick']
});react-html-parser is similar to html-react-parser in that it converts HTML strings into React components. However, it may differ in the specifics of its API and the options it provides for customization during the parsing process.
dangerously-set-html-content provides a component that can be used to set raw HTML content. It is similar to using the dangerouslySetInnerHTML prop in React but encapsulated in a component for easier use. It does not offer the same level of customization or parsing capabilities as html-react-parser.
sanitize-html-react is designed to sanitize HTML strings before they are rendered to prevent XSS attacks. It can be used in conjunction with html-react-parser to first sanitize the HTML string and then parse it into React components. It focuses more on security rather than parsing.
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.
To replace an element with another element, check out the replace option.
const parse = require('html-react-parser');
parse('<p>Hello, World!</p>'); // React.createElement('p', {}, 'Hello, World!')
Replit | JSFiddle | CodeSandbox | TypeScript | Examples
<script> tags parsed?trim for certain elements?NPM:
npm install html-react-parser --save
Yarn:
yarn add html-react-parser
CDN:
<!-- 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>
Import or require the module:
// ES Modules
import parse from 'html-react-parser';
// CommonJS
const parse = require('html-react-parser');
Parse single element:
parse('<h1>single</h1>');
Parse multiple elements:
parse('<li>Item 1</li><li>Item 2</li>');
Make sure to render parsed adjacent elements under a parent element:
<ul>
{parse(`
<li>Item 1</li>
<li>Item 2</li>
`)}
</ul>
Parse nested elements:
parse('<body><p>Lorem ipsum</p></body>');
Parse element with attributes:
parse(
'<hr id="foo" class="bar" data-attr="baz" custom="qux" style="top:42px;">'
);
The replace option allows you to replace an element with another element.
The replace callback's first argument is domhandler's node:
parse('<br>', {
replace: domNode => {
console.dir(domNode, { depth: null });
}
});
Console output:
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:
parse('<p id="replace">text</p>', {
replace: domNode => {
if (domNode.attribs && domNode.attribs.id === 'replace') {
return <span>replaced</span>;
}
}
});
For TypeScript projects, you may need to check that domNode is an instance of domhandler's Element:
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.
Replace the element and its children (see demo):
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:
<h1 style="font-size:42px">
<span style="color:hotpink">
keep me and make me pretty!
</span>
</h1>
Convert DOM attributes to React props with attributesToProps:
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:
<div class="prettify" style="background:#fff;text-align:center"></div>
Exclude an element from rendering by replacing it with <React.Fragment>:
parse('<p><br id="remove"></p>', {
replace: ({ attribs }) => attribs && attribs.id === 'remove' && <></>
});
HTML output:
<p></p>
The library option specifies the UI library. The default library is React.
To use Preact:
parse('<br>', {
library: require('preact')
});
Or a custom library:
parse('<br>', {
library: {
cloneElement: () => {
/* ... */
},
createElement: () => {
/* ... */
},
isValidElement: () => {
/* ... */
}
}
});
htmlparser2options do not work on the client-side (browser) and only works on the server-side (Node.js). By overridinghtmlparser2options, universal rendering can break.
Default htmlparser2 options can be overridden in >=0.12.0.
To enable xmlMode:
parse('<p /><p />', {
htmlparser2: {
xmlMode: true
}
});
By default, whitespace is preserved:
parse('<br>\n'); // [React.createElement('br'), '\n']
But certain elements like <table> will strip out invalid whitespace:
parse('<table>\n</table>'); // React.createElement('table')
To remove whitespace, enable the trim option:
parse('<br>\n', { trim: true }); // React.createElement('br')
However, intentional whitespace may be stripped out:
parse('<p> </p>', { trim: true }); // React.createElement('p')
domhandler has been upgraded to v5 so some parser options like normalizeWhitespace have been removed.
Also, it's recommended to upgrade to the latest version of typescript.
Since v2.0.0, Internet Explorer (IE) is no longer supported.
TypeScript projects will need to update the types in v1.0.0.
For the replace option, you may need to do the following:
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, Internet Explorer 9 (IE9) is no longer supported.
No, this library is not XSS (cross-site scripting) safe. See #94.
No, this library does not sanitize HTML. See #124, #125, and #141.
<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.
The reason why your HTML attributes aren't getting called is because inline event handlers (e.g., onclick) are parsed as a string rather than a function. See #73.
If the parser throws an erorr, check if your arguments are valid. See "Does invalid HTML get sanitized?".
Yes, server-side rendering on Node.js is supported by this library. See demo.
If your elements are nested incorrectly, check to make sure your HTML markup is valid. The HTML to DOM parsing will be affected if you're using self-closing syntax (/>) on non-void elements:
parse('<div /><div />'); // returns single element instead of array of elements
See #158.
Tags are lowercased by default. To prevent that from happening, pass the htmlparser2 option:
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.
The TypeScript error occurs because DOMNode needs be an instance of domhandler's Element. See migration or #199.
trim for certain elements?Yes, you can enable or disable trim for certain elements using the replace option. See #205.
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:
// webpack.config.js
module.exports = {
// ...
resolve: {
mainFields: ['browser', 'main', 'module']
}
};
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. See #748.
Run benchmark:
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:
npx size-limit
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FAQs
HTML to React parser.
The npm package html-react-parser receives a total of 1,567,712 weekly downloads. As such, html-react-parser popularity was classified as popular.
We found that html-react-parser demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 0 open source maintainers collaborating on the project.
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