最简单的搜索文本高亮

let re='附件阿济格阿三哥阿发阿三哥IG安抚巾；抗拒阿三哥奥斯卡价格爱干净阿gas刚安上阿三哥；安上gas'

let str='三哥'

var reg = new RegExp(`([${str.split('').join('|')}]+)`, "g");

var highlightTerm = `<span style="color:red">$1</span>`;

re=re.replace(reg,highlightTerm )