44 lines
1.4 KiB
JavaScript
44 lines
1.4 KiB
JavaScript
import fuzzaldrinPlus from 'fuzzaldrin-plus';
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import { sanitize } from '~/lib/dompurify';
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/**
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* Wraps substring matches with HTML `<span>` elements.
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* Inputs are sanitized before highlighting, so this
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* filter is safe to use with `v-html` (as long as `matchPrefix`
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* and `matchSuffix` are not being dynamically generated).
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*
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* Note that this function can't be used inside `v-html` as a filter
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* (Vue filters cannot be used inside `v-html`).
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*
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* @param {String} string The string to highlight
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* @param {String} match The substring match to highlight in the string
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* @param {String} matchPrefix The string to insert at the beginning of a match
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* @param {String} matchSuffix The string to insert at the end of a match
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*/
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export default function highlight(string, match = '', matchPrefix = '<b>', matchSuffix = '</b>') {
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if (!string) {
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return '';
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}
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if (!match) {
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return string;
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}
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const sanitizedValue = sanitize(string.toString(), { ALLOWED_TAGS: [] });
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// occurrences is an array of character indices that should be
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// highlighted in the original string, i.e. [3, 4, 5, 7]
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const occurrences = fuzzaldrinPlus.match(sanitizedValue, match.toString());
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return sanitizedValue
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.split('')
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.map((character, i) => {
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if (occurrences.includes(i)) {
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return `${matchPrefix}${character}${matchSuffix}`;
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}
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return character;
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})
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.join('');
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}
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