CODEWITHSUNDEEP
javascriptreactjssvgxss
James Paterson
James Paterson

Reputation: 2890

Turning an SVG string into an image in a React component

I have a dynamically generated SVG string in a React component. I want to embed this as an image in the component. Currently, I'm using something along the lines of:

class SomeComponent extends React.Component {
    render() {
        var image = '<svg xmlns="http://www.w3.org/2000/svg" version="1.2" baseProfile="tiny" width="47.4" height="40.65" viewBox="21 18.5 158 135.5"><path d="M25,50 l150,0 0,100 -150,0 z" stroke-width="4" stroke="black" fill="rgb(128,224,255)" fill-opacity="1" ></path><path d="M25,50 L175,150 M25,150 L175,50" stroke-width="4" stroke="black" fill="black" ></path><g transform="translate(0,0)" stroke-width="4" stroke="black" fill="none" ><circle cx="100" cy="30" r="7.5" fill="black" ></circle><circle cx="70" cy="30" r="7.5" fill="black" ></circle><circle cx="130" cy="30" r="7.5" fill="black" ></circle></g></svg>';
        return (
            <div dangerouslySetInnerHTML={{ __html: image }} />
        )
    }
}

However using a property called dangerouslySetInnerHTML makes me pretty uneasy. Is there a more generally accepted (and safer) way to do this?

Upvotes: 44

Views: 46086

Answers (7)

Mohsenasm
Mohsenasm

Reputation: 3141

I know the question is about the string of an svg object, but in many cases you can use the svg object directly and even change it dynamically, which can be a cleaner approach in comparison to using string.

Using the svg object directly:

import React from 'react';

function CustomSvgObject({ }) {
    return <svg xmlns="http://www.w3.org/2000/svg" version="1.2" baseProfile="tiny" width="47.4" height="40.65" viewBox="21 18.5 158 135.5"><path d="M25,50 l150,0 0,100 -150,0 z" stroke-width="4" stroke="black" fill="rgb(128,224,255)" fill-opacity="1" ></path><path d="M25,50 L175,150 M25,150 L175,50" stroke-width="4" stroke="black" fill="black" ></path><g transform="translate(0,0)" stroke-width="4" stroke="black" fill="none" ><circle cx="100" cy="30" r="7.5" fill="black" ></circle><circle cx="70" cy="30" r="7.5" fill="black" ></circle><circle cx="130" cy="30" r="7.5" fill="black" ></circle></g></svg>
}

You can also dynamically change the svg, like the className property or the color of the svg elements:

import React from 'react';

function CustomSvgObject({ className, color }) {
    return <svg className={className} xmlns="http://www.w3.org/2000/svg" version="1.2" baseProfile="tiny" width="47.4" height="40.65" viewBox="21 18.5 158 135.5"><path d="M25,50 l150,0 0,100 -150,0 z" stroke-width="4" stroke={color} fill="rgb(128,224,255)" fill-opacity="1" ></path><path d="M25,50 L175,150 M25,150 L175,50" stroke-width="4" stroke={color} fill={color} ></path><g transform="translate(0,0)" stroke-width="4" stroke={color} fill="none" ><circle cx="100" cy="30" r="7.5" fill={color} ></circle><circle cx="70" cy="30" r="7.5" fill={color} ></circle><circle cx="130" cy="30" r="7.5" fill={color} ></circle></g></svg>
}

Upvotes: -1

James P
James P

Reputation: 838

Since the SVG is dynamically generated and you can't store it as an asset, as an alternative to dangerouslySetInnerHTML, you could simply set it as a Data URI on the image. So something like...


class SomeComponent extends React.Component {
    render() {
        const image = '<svg xmlns="http://www.w3.org/2000/svg" version="1.2" baseProfile="tiny" width="47.4" height="40.65" viewBox="21 18.5 158 135.5"><path d="M25,50 l150,0 0,100 -150,0 z" stroke-width="4" stroke="black" fill="rgb(128,224,255)" fill-opacity="1" ></path><path d="M25,50 L175,150 M25,150 L175,50" stroke-width="4" stroke="black" fill="black" ></path><g transform="translate(0,0)" stroke-width="4" stroke="black" fill="none" ><circle cx="100" cy="30" r="7.5" fill="black" ></circle><circle cx="70" cy="30" r="7.5" fill="black" ></circle><circle cx="130" cy="30" r="7.5" fill="black" ></circle></g></svg>';
        return (
            <div>
              <img src={`data:image/svg+xml;utf8,${encodeURIComponent(image)}`} />
            </div>
        )
    }
}

See post here: https://css-tricks.com/lodge/svg/09-svg-data-uris/

Upvotes: 54

Jannchie
Jannchie

Reputation: 1008

In this way, I succeeded.

const svgStr = "<svg></svg>";
const svg = new Blob([svgStr], { type: "image/svg+xml" });
const url = URL.createObjectURL(svg);

<img src={url} />

Upvotes: 6

Aakash
Aakash

Reputation: 23737

React ref with innerHTML works quite well and is clean.

var image = '<svg xmlns="http://www.w3.org/2000/svg" version="1.2" baseProfile="tiny" width="47.4" height="40.65" viewBox="21 18.5 158 135.5"><path d="M25,50 l150,0 0,100 -150,0 z" stroke-width="4" stroke="black" fill="rgb(128,224,255)" fill-opacity="1" ></path><path d="M25,50 L175,150 M25,150 L175,50" stroke-width="4" stroke="black" fill="black" ></path><g transform="translate(0,0)" stroke-width="4" stroke="black" fill="none" ><circle cx="100" cy="30" r="7.5" fill="black" ></circle><circle cx="70" cy="30" r="7.5" fill="black" ></circle><circle cx="130" cy="30" r="7.5" fill="black" ></circle></g></svg>';


const useApp = () => {
  const svgWrapperRef = React.useRef();
  React.useEffect(() => {
    svgWrapperRef.current.innerHTML = image;
  }, [])
  return {
    svgWrapperRef
  }
}
const App = () => {
  const {svgWrapperRef} = useApp()
  return (
    <div ref={svgWrapperRef}></div>
  )
}

const root = document.getElementById('root')

ReactDOM.render(<App />, root)
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.13.1/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.13.1/umd/react-dom.production.min.js"></script>

<div id="root"></div>

Good Luck...

Upvotes: 7

Fred Vanelli
Fred Vanelli

Reputation: 767

Simply use this package: https://github.com/gilbarbara/react-inlinesvg

Example:

import SVG from 'react-inlinesvg';

...    

const mySVG = '<svg xmlns="http://www.w3.org/2000/svg">...</svg>';
return <SVG src={mySVG} />;

Upvotes: 10

Soley
Soley

Reputation: 1776

One thing you can do is to convert your svg string to base64 and then use it like this:

const image = '<svg xmlns="http://www.w3.org/2000/svg" version="1.2" baseProfile="tiny" width="47.4" height="40.65" viewBox="21 18.5 158 135.5"><path d="M25,50 l150,0 0,100 -150,0 z" stroke-width="4" stroke="black" fill="rgb(128,224,255)" fill-opacity="1" ></path><path d="M25,50 L175,150 M25,150 L175,50" stroke-width="4" stroke="black" fill="black" ></path><g transform="translate(0,0)" stroke-width="4" stroke="black" fill="none" ><circle cx="100" cy="30" r="7.5" fill="black" ></circle><circle cx="70" cy="30" r="7.5" fill="black" ></circle><circle cx="130" cy="30" r="7.5" fill="black" ></circle></g></svg>';
const buff = new Buffer(image);
const base64data = buff.toString('base64');

return <img src='data:image/svg+xml;base64,${base64data }' alt="" />

if you don't want to use buffer, use this:

const base64data = btoa(unescape(encodeURIComponent(image)));

Upvotes: 15

eagercoder
eagercoder

Reputation: 544

I would store the svg image in a separate folder(assets), and import the image into the react component

Something like this:

SomeComponent.js:

import { SampleImage } from '../assets/SomeFile';

class SomeComponent extends React.Component {
    render() {

        return (
            <div>
              <img src={SampleImage} />
            <div/>
        )
    }
}

SomeFile.svg:

<?xmlns="http://www.w3.org/2000/svg" version="1.2"encoding="UTF-8"?>

 <svg baseProfile="tiny" width="47.4" height="40.65" viewBox="21 18.5 158 135.5"><path d="M25,50 l150,0 0,100 -150,0 z" stroke-width="4" stroke="black" fill="rgb(128,224,255)" fill-opacity="1" ></path><path d="M25,50 L175,150 M25,150 L175,50" stroke-width="4" stroke="black" fill="black" ></path><g transform="translate(0,0)" stroke-width="4" stroke="black" fill="none" ><circle cx="100" cy="30" r="7.5" fill="black" ></circle><circle cx="70" cy="30" r="7.5" fill="black" ></circle><circle cx="130" cy="30" r="7.5" fill="black" >
    </circle></g>
 </svg>

Upvotes: -5

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