2018-03-09 15:18:59 -05:00
|
|
|
import $ from 'jquery';
|
2018-03-20 00:01:17 -04:00
|
|
|
import { __ } from '~/locale';
|
|
|
|
import flash from '~/flash';
|
2017-03-17 13:21:25 -04:00
|
|
|
|
2016-12-08 19:15:08 -05:00
|
|
|
// Renders math using KaTeX in any element with the
|
|
|
|
// `js-render-math` class
|
|
|
|
//
|
|
|
|
// ### Example Markup
|
|
|
|
//
|
|
|
|
// <code class="js-render-math"></div>
|
|
|
|
//
|
|
|
|
|
2017-11-22 13:40:11 -05:00
|
|
|
// Loop over all math elements and render math
|
2017-12-14 18:16:55 -05:00
|
|
|
function renderWithKaTeX(elements, katex) {
|
2017-11-22 13:40:11 -05:00
|
|
|
elements.each(function katexElementsLoop() {
|
|
|
|
const mathNode = $('<span></span>');
|
|
|
|
const $this = $(this);
|
2016-12-08 19:15:08 -05:00
|
|
|
|
2017-11-22 13:40:11 -05:00
|
|
|
const display = $this.attr('data-math-style') === 'display';
|
|
|
|
try {
|
2018-01-24 13:02:40 -05:00
|
|
|
katex.render($this.text(), mathNode.get(0), { displayMode: display, throwOnError: false });
|
2017-11-22 13:40:11 -05:00
|
|
|
mathNode.insertAfter($this);
|
|
|
|
$this.remove();
|
|
|
|
} catch (err) {
|
|
|
|
throw err;
|
|
|
|
}
|
|
|
|
});
|
|
|
|
}
|
2016-12-08 19:15:08 -05:00
|
|
|
|
2017-11-22 13:40:11 -05:00
|
|
|
export default function renderMath($els) {
|
|
|
|
if (!$els.length) return;
|
2018-02-12 14:04:59 -05:00
|
|
|
Promise.all([
|
|
|
|
import(/* webpackChunkName: 'katex' */ 'katex'),
|
2018-03-28 16:01:57 -04:00
|
|
|
import(/* webpackChunkName: 'katex' */ 'katex/dist/katex.min.css'),
|
2018-10-10 02:09:55 -04:00
|
|
|
])
|
|
|
|
.then(([katex]) => {
|
|
|
|
renderWithKaTeX($els, katex);
|
|
|
|
})
|
|
|
|
.catch(() => flash(__('An error occurred while rendering KaTeX')));
|
2017-11-22 13:40:11 -05:00
|
|
|
}
|