Is there any more efficent way other than using dangerouslySetInnerHTML to set svg string?

[cooljacket]

When I'm parsing markdown text, I will have a string whose content is a svg file, such as

<svg height="100" width="100">
<circle 
    cx="50" cy="50" r="40" 
    stroke="black" stroke-width="3" fill="red" />
</svg>

As far as now, it seems that the only way to render this svg string is to use dangerouslySetInnerHTML, I wanna to ask:

1. Will this way inefficent?
2. Is there any more efficent way in React?

Thanks for reading this issue.
Looking forward your awesome answers.

[gaearon]

There are no performance problems with doing this. But be careful to make sure the HTML string is coming from a trusted source since otherwise it will create a security issue.

[paulcredmond]

You can also use a HTML parser to avoid using dangerouslySetInnerHTML.

https://www.npmjs.com/package/react-html-parser

[gaearon]

Shipping HTML parser to the client just to parse a pre-generated SVG seems excessive and would create a performance issue — unless you do it at compile time.

[paulcredmond]

@gaearon Yep, very valid point.

[ramsunvtech]

@gaearon, How about adding DOMPurify to sanitise the HTML before inserting it in the DOM via dangerouslySetInnerHTML

[anvesh-xactly]

@ramsunvtech Unless there's a compelling reason to do so, I think it'd be an overkill to do DOMPurify in the browser.

[ScriptedAlchemy]

Any DOM parsing ontop of react is going to be extremely slow. JSON stringify alone destroys mount times. If you can avoid it, do.