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39 lines
1.2 KiB
39 lines
1.2 KiB
function displayError(el, err) {
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const target = targetElement(el);
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target.remove('is-loading');
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const errorNode = document.createElement('div');
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errorNode.setAttribute('class', 'ui message error markup-block-error mono');
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errorNode.textContent = err.str || err.message || String(err);
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target.before(errorNode);
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}
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function targetElement(el) {
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// The target element is either the current element if it has the `is-loading` class or the pre that contains it
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return el.classList.contains('is-loading') ? el : el.closest('pre');
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}
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export async function renderMath() {
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const els = document.querySelectorAll('.markup code.language-math');
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if (!els.length) return;
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const [{default: katex}] = await Promise.all([
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import(/* webpackChunkName: "katex" */'katex'),
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import(/* webpackChunkName: "katex" */'katex/dist/katex.css'),
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]);
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for (const el of els) {
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const source = el.textContent;
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const nodeName = el.classList.contains('display') ? 'p' : 'span';
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try {
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const tempEl = document.createElement(nodeName);
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katex.render(source, tempEl, {
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maxSize: 25,
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maxExpand: 50,
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});
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targetElement(el).replaceWith(tempEl);
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} catch (error) {
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displayError(el, error);
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}
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}
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}
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