题解 | #字体高亮#

btn.onclick = () => {
                // 补全代码
                let content = text.innerText
                const keyWord = search.value
                if(keyWord == '' || keyWord == null){
                  content = content.replace(`/<b style="background: yellow">/g`, '')
                  content = content.replace(`/<\/b>/g`, '')
                }
                if(content.indexOf(keyWord) > -1){
                  const Reg = new RegExp(keyWord, 'g')
                  content = content.replace(Reg, `<b style="background: yellow">${keyWord}</b>`)
                }
                text.innerHTML = content
            }

使用replaceAll无法通过  replace可以