<pre class="shiki github-dark shaku"><code>/** * @param {string} html * @param {string[]} keywords */function highlightKeywords(html, keywords) { const combination = [] let arr = html.split(' ') const getCombination = (head, arr) =&gt; { for (let i = 0; i &lt; arr.length; i += 1) { const temp = [...arr] temp.splice(i, 1) const name = `${head}${arr[i]}` combination.push(name) getCombination(name, temp) } } getCombination('', keywords) arr = arr.map((item) =&gt; { if (combination.includes(item)) { return `&lt;em&gt;${item}&lt;/em&gt;` } else if (keywords.some((keyword) =&gt; item.includes(keyword))) { for (let i = 0; i &lt; keywords.length; i += 1) { const keyword = keywords[i] if (item.includes(keyword)) { const reg = new RegExp(keyword, 'g') item = item.replace(reg, `&lt;em&gt;${keyword}&lt;/em&gt;`) break } } return item } else { return item } }) return arr.join(' ')};</code></pre>

get the permutation and combination of all keywords ！！！

Suppose you are implementing an auto-complete in search input. When keywords are typed, you need to highlight the keywords, how would you do that? To …