CODEWITHSUNDEEP
htmlreactjs
gyss
gyss

Reputation: 1843

How to render a string with JSX in React

I need to render an HTML (JSX) string in a React class. I don't know if this is possible or not. dangerouslySetInnerHTML is not valid for me because I have different react components inside this file. It's not plain HTML.

I have an example with the expected result: https://jsfiddle.net/86rg50re/1/

var MyComponent = React.createClass({
    propTypes: {
        owner: React.PropTypes.string
    },

    render: function() {
        return <div>Congrats {this.props.owner}! you have rendered MyComponent ({this.props.children})</div>;
    }
});

var Hello = React.createClass({
    render: function() {
        return <div>Header <MyComponent owner={"Daniel"}>Yayyyyyy!</MyComponent></div>;
    }
});

But what I have is this:

var Hello = React.createClass({
    render: function() {
        var content = '<div>Header <MyComponent owner={"Daniel"}>Yayyyyyy!</MyComponent></div>';
        return transformStringToJSX(content);
    }

Obviously transformStringToJSX doesn't exists.

Is there a way to render jsx strings?

Upvotes: 16

Views: 18297

Answers (2)

ICW
ICW

Reputation: 5789

The most upvoted answer simply does not work, skips various crucial steps, and doesn't explain where the code should go. I'm not sure if the poster just didn't actually run the code or what. Anyways, to actually get it working you need to do something like this:

npm install @babel/core

npm install @babel/preset-react

You need to use babel to transform the JSX into valid javascript that can run clientside on the server side. The serverside code in next.js

export async function getServerSideProps() {
    const stringToRender = require('@babel/core').transform('<h1><Component/></h1>', {presets: ['@babel/preset-react']});
    return {
        props: {
            stringToRender
        }
    }
}

Now we need to evaluate the string on the client:

import React from 'react';
import Component from '../component'; // Import your component

export default function Page({stringToRender}) {
    const [content, setContent] = useState(null);
    
    useEffect(()=>{
        // It is necessary to evaluate within useEffect and window so that React are available.
        window.Component = Component; // This makes Component defined in the `eval` call.
        setContent(eval(stringToRender))
    }, [])
    
    return (
        <div>
            {content}
        </div>
    )
}

export async function getServerSideProps() {
    const stringToRender = require('@babel/core').transform('<h1><Component/></h1>', {presets: ['@babel/preset-react']});
    return {
        props: {
            stringToRender
        }
    }
}

This code will actually run to the desired effect. If you have any additional components to render you will need to set them individually on the window object so that the components will be defined when the eval() call is made.

Upvotes: 2

hampusohlsson
hampusohlsson

Reputation: 10219

You can use babel to transform it

npm install --save babel-core

Then in your code

var babel = require('babel-core');
var Component = eval(babel.transform('<div><MyComponent /></div>').code);

Please note that it is generally a bad idea to convert strings to executable code.

Upvotes: 11

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