highlightjs

This plugin uses highlightjs to highlight sourcecode in your presentation.

```js
your code
```

You have to remplace the highlight.min.js and css if you want to uses other languages. (default : js). To do that, go to: https://highlightjs.org/download

If you want to use another theme, you can download it from https://highlightjs.org/download

You can add focus line through the following syntax:

```js@focus=2:4,8:9
console.log('Hello World');
if (true) {
  console.log('I am focused');
}
else {
  console.log('I am not focused');
}
console.log('I am focused too');
console.log('Me too');
console.log('Me not');
```

And you can customize the style with:

.hljs-focus.focused {
  border-left: 2px solid #78e08f55;
  background: #78e08f05;
  padding: 2px;
  padding-left: 10px;
}

.hljs-focus.unfocused {
  border-left: 2px solid transparent;
  padding-left: 10px;
  opacity: 0.5;
  filter: grayscale(1);
}