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42 lines
1.3 KiB
JavaScript
42 lines
1.3 KiB
JavaScript
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const { isExternalLink } = require('./strings.cjs');
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/**
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* Transforms external links to make them safer and optionally add a target. The provided doc should be a document
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* object provided by JSDOM. The same document will be returned with the appropriate DOM manipulations.
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*/
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module.exports = function (doc, options) {
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options = {
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className: 'external-link', // the class name to add to links
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noopener: true, // sets rel="noopener"
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noreferrer: true, // sets rel="noreferrer"
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ignore: () => false, // callback function to filter links that should be ignored
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within: 'body', // element that contains the target links
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target: '', // sets the target attribute
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...options
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};
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const within = doc.querySelector(options.within);
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if (within) {
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within.querySelectorAll('a').forEach(link => {
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if (isExternalLink(link) && !options.ignore(link)) {
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link.classList.add(options.className);
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const rel = [];
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if (options.noopener) rel.push('noopener');
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if (options.noreferrer) rel.push('noreferrer');
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if (rel.length) {
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link.setAttribute('rel', rel.join(' '));
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}
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if (options.target) {
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link.setAttribute('target', options.target);
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}
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}
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});
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}
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return doc;
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};
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