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docs: add warning re:defer to mhchem documentation (#2485)

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* Add warning re:defer to mhchem documentation.

* Edit description of defer behavior.

* Add nuance to the explanation regarding `defer`.
This commit is contained in:
Ron Kok
2020-09-07 09:59:02 -07:00
committed by GitHub
parent 5a90558116
commit d4324a724b
1 changed files with 3 additions and 1 deletions
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contrib/mhchem/README.md
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@@ -7,9 +7,11 @@ This extension adds to KaTeX the `\ce` and `\pu` functions from the [mhchem](htt
This extension isn't part of core KaTeX, so the script should be separately included. Write the following line into the HTML page's `<head>`. Place it *after* the line that calls `katex.js`.
```html
<script src="https://cdn.jsdelivr.net/npm/katex@0.12.0/dist/contrib/mhchem.min.js" integrity="sha384-5gCAXJ0ZgozlShOzzT0OWArn7yCPGWVIvgo+BAd8NUKbCmulrJiQuCVR9cHlPHeG"></script>
<script defer src="https://cdn.jsdelivr.net/npm/katex@0.12.0/dist/contrib/mhchem.min.js" integrity="sha384-5gCAXJ0ZgozlShOzzT0OWArn7yCPGWVIvgo+BAd8NUKbCmulrJiQuCVR9cHlPHeG" crossorigin="anonymous"></script>
```
If you remove the `defer` attribute from this tag, then you must also remove the `defer` attribute from the `<script src="https://../katex.min.js">` tag.
### Syntax
See the [mhchem Manual](https://mhchem.github.io/MathJax-mhchem/) for a full explanation of the input syntax, with working examples. The manual also includes a demonstration box.