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gitea/web_src/js/markup/math.js

37 lines
1.2 KiB

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