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27e3cddfbe
This should eliminate page freezes when loading big files/diff. `highlightBlock` is needed to preserve existing nodes when highlighting and for that, highlight.js needs access to the DOM API so I added a DOM implementation to make it work, which adds around 300kB to the output file size of the lazy-loaded `highlight.js`. Co-authored-by: Lauris BH <lauris@nix.lv>
20 lines
693 B
JavaScript
20 lines
693 B
JavaScript
export default async function highlight(elementOrNodeList) {
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if (!window.config || !window.config.HighlightJS || !elementOrNodeList) return;
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const nodes = 'length' in elementOrNodeList ? elementOrNodeList : [elementOrNodeList];
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if (!nodes.length) return;
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const {default: Worker} = await import(/* webpackChunkName: "highlight" */'./highlight.worker.js');
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const worker = new Worker();
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worker.addEventListener('message', ({data}) => {
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const {index, html} = data;
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nodes[index].outerHTML = html;
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});
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for (let index = 0; index < nodes.length; index++) {
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const node = nodes[index];
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if (!node) continue;
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worker.postMessage({index, html: node.outerHTML});
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}
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}
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