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Add the langPrefix option to the highlight syntax example #309

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Add the langPrefix option to the highlight syntax example #309

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2 changes: 2 additions & 0 deletions README.md
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Expand Up @@ -164,6 +164,7 @@ var hljs = require('highlight.js') // https://highlightjs.org/

// Actual default values
var md = new Remarkable({
langPrefix: 'hljs language-',
highlight: function (str, lang) {
if (lang && hljs.getLanguage(lang)) {
try {
Expand All @@ -180,6 +181,7 @@ var md = new Remarkable({
});
```

The `langPrefix` option is required to pass the `hljs` class to the code block so that the full Highlight.js styles are applied correctly. Note that it will only work if [your fenced code block has params set, like a language param](https://github.com/jonschlinkert/remarkable/issues/224#issuecomment-339686207).

### Syntax extensions

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