If you’re a developer looking to transform HTML strings into React elements dynamically, the html-react-parser library is your go-to solution! This guide will take you through the installation, usage, and common troubleshooting tips to get you started.

Table of Contents

• Install
• Usage
• Replace Elements
• Transform Elements
• Migration
• FAQ
• Performance

Installation

To install html-react-parser, you can use either npm or yarn:

• NPM:

npm install html-react-parser --save

• Yarn:

yarn add html-react-parser

• CDN:

<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>

Usage

Once you have installed the library, you need to import it and start parsing HTML strings into React components.

Importing the Library

import parse from 'html-react-parser';

Parsing HTML Elements

You can parse single or multiple HTML elements:

parse('<h1>Single</h1>'); // Single Element

parse('<li>Item 1</li><li>Item 2</li>'); // Multiple Elements

Replacing Elements

The replace option allows you to substitute an HTML element with another React element. For example:

parse('<br>', replace: (domNode) => {

  if (domNode.name === 'br') {

    return <span>New Span</span>;

  }

});

Transforming Elements

You can use the transform option to apply a transformation to each parsed element. For instance:

parse('<br>', transform: (reactNode) => {

  return <div>{reactNode}</div>;

});

Migration

With the evolution of the library, ensure you adhere to the migration guidelines from previous versions. For example, if you’re moving to a newer version:

const parse = require('html-react-parser').default;

Frequently Asked Questions

Some of the most common queries related to HTML-React-Parser include:

• Is this XSS safe?
  No, this library is not XSS safe.
• Does invalid HTML get sanitized?
  No, invalid HTML is not sanitized.
• Are script tags parsed?
  Yes, they are rendered on the server but not evaluated in the client browser.

Performance

The library demonstrates high performance, running benchmarks showing 1,018,239 operations/second for single elements and 380,037 operations/second for multiple elements.

Troubleshooting

• If the parser throws an error, verify that your HTML is valid. Invalid HTML can lead to parsing issues.
• For attributes not being called, ensure you’re not using inline event handlers, as these are parsed as strings.
• Check your Webpack config if you encounter build warnings. You might need to update the main fields in your configuration.
• Elements not nested correctly? Ensure your HTML markup is valid. Check it with the W3C Validator.

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