33 lines
1.1 KiB
JavaScript
33 lines
1.1 KiB
JavaScript
import {svg} from '../utils.js';
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const headingSelector = '.markdown h1, .markdown h2, .markdown h3, .markdown h4, .markdown h5, .markdown h6';
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function scrollToAnchor() {
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if (document.querySelector(':target')) return;
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if (!window.location.hash || window.location.hash.length <= 1) return;
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const id = window.location.hash.substring(1);
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const el = document.getElementById(`user-content-${id}`);
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if (el) {
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el.scrollIntoView();
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} else if (id.startsWith('user-content-')) { // compat for links with old 'user-content-' prefixed hashes
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const el = document.getElementById(id);
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if (el) el.scrollIntoView();
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}
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}
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export default function initMarkdownAnchors() {
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if (!document.querySelector('.markdown')) return;
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for (const heading of document.querySelectorAll(headingSelector)) {
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const originalId = heading.id.replace(/^user-content-/, '');
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const a = document.createElement('a');
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a.classList.add('anchor');
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a.setAttribute('href', `#${encodeURIComponent(originalId)}`);
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a.innerHTML = svg('octicon-link', 16);
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heading.prepend(a);
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}
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scrollToAnchor();
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window.addEventListener('hashchange', scrollToAnchor);
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}
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