html tags in children about react-truncate HOT 12 CLOSED

Is this still being considered? I'd love HTML support (or at the very least, some sort of markup passthrough)

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@codejet @pablosichert Thanks for pointing me to ellipsis.js

I made a simple react component if others are trying to use ellipsis.js within React

https://gist.github.com/cbosco/4339f6d842c6c9ac35f21982e98b4412

There is one caveat - ellipsis.js works well with the exception of comment nodes; I put a PR into ellipsis.js: glinford/ellipsis.js#7

Also, ellipsis.js on npm is outdated, you'll want to point to either glinford or cbosco via github

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My text was an html string (ie. "<p>Some text</p><br /> br /><p>Some more text</p>") and I was able to use this:

<span dangerouslySetInnerHTML={{ __html: textStringWithHTML  }} />

as a the child element and the html tags worked!

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This package works for me: https://www.npmjs.com/package/react-truncate-markup

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Unfortunately react-truncate-markup does not support React components, only true DOM elements, which I found a problem as the markup I want to display is created using a number of nested React components. I wish/hope there is a better way, but I found this "hack" to make it work based on XigeTime's solution above:

import { renderToString } from 'react-dom/server';
import Truncate from 'react-truncate';

const html = renderToString(children);
<Truncate lines={2}>
    <span dangerouslySetInnerHTML={{ __html: html }} />
</Truncate>

PLEASE tell me there is a more elegant way to do this!

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That's an interesting question, I guess you are talking about preserving something like <b>, <i>, and <u> tags - would it be possible that you provide the particular scenario that you have in mind?

It might be possible to work out a solution with a combination of textContent, innerHTML and childNodes.

Iterating over the child nodes, and appending them unmodified when the text content fits completely. Then, for the first child node that exceeds the boundaries modifying its HTML to make it fit, and finally, appending the ellipsis.

This might fail horribly when the width of the DOMNode is different from <span>DOMNode.textContent</span>, since the calculation relies on that. Also, adjusting the HTML of the exceeding node could be really tricky, and approximating it with the text content would be fair enough to make a demo work.

If you want to take a shot at implementing this, I'm more than willing to help you figure it out!

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Thanks for the fast reply @pablosichert

As we all know, time is usually the issue :) But should I find some this weekend or so, I will see what I can do. Can't promise anything though...

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Digging around a bit, I found out about the Range API.

Making use of Range.extractContents() could be feasible.

Selecting the nodes accordingly and modifying a node, when the end lies within a non-text node could be tricky. Haven't tried yet.

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Working out a solution would mean investing a considerable amount of time - and unfortunately I didn't have a use case that would have justified the time for me.

I think https://github.com/glinford/ellipsis.js made it work, but I didn't get to review yet how it's implemented and what the performance implications would be.

If you want to contribute by porting that feature, I would very welcome it.

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But if I use Ellipsis.js it does not give me the ontruncate Function and just adds ellipsis.I need both read more/show less and te description needs to be html :)
Is there anything that can help me in addressing both the issues

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@jesspoemape Can you share your sample code that you used with children prop set to a html string and found it working! I'm trying to use the same, but haven't got the html tags getting rendered yet.

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Hi @kashifshamaz21, if you're still looking to get HTML content working, try this:
<Truncate lines={2} ellipsis={'...'}> <span dangerouslySetInnerHTML={{ __html: your_html } } /> </Truncate>

Simply set the inner HTML on a child component rather than the Truncate component.

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