I am building something with React where I need to insert HTML with React Variables in JSX. Is there a way to have a variable like so:

var thisIsMyCopy = '<p>copy copy copy <strong>strong copy</strong></p>';

and to insert it into react like so, and have it work?

render: function() {
    return (
        <div className="content">{thisIsMyCopy}</div>
    );
}

and have it insert the HTML as expected? I haven't seen or heard anything about a react function that could do this inline, or a method of parsing things that would allow this to work.

Solution 1

You can use dangerouslySetInnerHTML, e.g.

render: function() {
    return (
        <div className="content" dangerouslySetInnerHTML={{__html: thisIsMyCopy}}></div>
    );
}

Solution 2

Note that dangerouslySetInnerHTML can be dangerous if you do not know what is in the HTML string you are injecting. This is because malicious client side code can be injected via script tags.

It is probably a good idea to sanitize the HTML string via a utility such as DOMPurify if you are not 100% sure the HTML you are rendering is XSS (cross-site scripting) safe.

Example:

import DOMPurify from 'dompurify'

const thisIsMyCopy = '<p>copy copy copy <strong>strong copy</strong></p>';


render: function() {
    return (
        <div className="content" dangerouslySetInnerHTML={{__html: DOMPurify.sanitize(thisIsMyCopy)}}></div>
    );
}

Solution 3

dangerouslySetInnerHTML has many disadvantage because it set inside the tag.

I suggest you to use some react wrapper like i found one here on npm for this purpose. html-react-parser does the same job.

import Parser from 'html-react-parser';
var thisIsMyCopy = '<p>copy copy copy <strong>strong copy</strong></p>';


render: function() {
    return (
        <div className="content">{Parser(thisIsMyCopy)}</div>
    );
}

Very Simple :)

UPDATE

in the latest version as usage explained:

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

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

//Parse single element
parse('<li>Item 1</li><li>Item 2</li>');

//Parse multiple elements
parse('<li>Item 1</li><li>Item 2</li>');

Solution 4

By using '' you are making it to a string. Use without inverted commas it will work fine.

const App = () => {
const span = <span> whatever your string </span>

const dynamicString = "Hehe";
const dynamicStringSpan = <span> {`${dynamicString}`} </span>

  return (
    <div>

      {span}

      {dynamicStringSpan}

    </div>
  );

};

ReactDOM.render(<App />, document.getElementById("root"));
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js"></script>
<div id="root"></div>

Solution 5

import { Fragment } from 'react' // react version > 16.0

var thisIsMyCopy = (
  <Fragment>
    <p>copy copy copy&nbsp;
    <strong>strong copy</strong>
    </p>
  </Fragment>
)

By using '' the sets the value to a string and React has no way of knowing that it is a HTML element. You can do the following to let React know it is a HTML element -

  1. Remove the '' and it would work
  2. Use <Fragment> to return a HTML element.

Solution 6

To avoid linter errors, I use it like this:

  render() {
    const props = {
      dangerouslySetInnerHTML: { __html: '<br/>' },
    };
    return (
        <div {...props}></div>
    );
  }

Solution 7

You don't need any special library or "dangerous" attribute. You can just use React Refs to manipulate the DOM:

class MyComponent extends React.Component {
    
    constructor(props) {
        
        super(props);       
        this.divRef = React.createRef();
        this.myHTML = "<p>Hello World!</p>"
    }
    
    componentDidMount() {
        
        this.divRef.current.innerHTML = this.myHTML;
    }
    
    render() {
        
        return (
            
            <div ref={this.divRef}></div>
        );
    }
}

A working sample can be found here:

https://codepen.io/bemipefe/pen/mdEjaMK

Solution 8

Try Fragment, if you don't want any of above.

In your case, we can write

import React, {useState, Fragment} from 'react'

const thisIsMyCopy = Fragment('<p>copy copy copy <strong>strong copy</strong></p>')

render: function() {
    return (
        <div className="content">{thisIsMyCopy}</div>
    );
}

If you using hook want to set it in a state somewhere with any condition

const [thisIsMyCopy, setThisIsMyCopy] = useState(<Fragment><p>copy copy copy <strong>strong copy</strong></p></Fragment>);

Solution 9

If anyone else still lands here. With ES6 you can create your html variable like so:

render(){
    var thisIsMyCopy = (
        <p>copy copy copy <strong>strong copy</strong></p>
    );
    return(
        <div>
            {thisIsMyCopy}
        </div>
    )
}

Solution 10

You can also include this HTML in ReactDOM like this:

var thisIsMyCopy = (<p>copy copy copy <strong>strong copy</strong></p>);

ReactDOM.render(<div className="content">{thisIsMyCopy}</div>, document.getElementById('app'));

Here are two links link and link2 from React documentation which could be helpful.