题解 | #字体高亮#

btn.onclick = () => {
        // 补全代码
        let mytext = text.innerText;
        let myvalue = new RegExp(search.value,'g');
        if(search.value!==''){
            mytext = mytext.replace(myvalue, `<b style="background:yellow;">${search.value}</b>`);
        }
        text.innerHTML = mytext;
      };