正则匹配英文关键字高亮，高亮后的关键字和之前的大小写保持一致

Posted 2022-05-19 asdfasdfasdad

JS代码：

var str="a|c javascript Javascript JavaScript Javascript  JAVASCRIPT";
var keyword  = "a|c javascript";
keyword = '('+keyword.replace(/([\\+\\.\\*\\|\\?\\-\\(\\[\\^\\$])/g,'\\\\$1' ).replace(/\\s+/g,'|')+')';//把匹配关键字中的正则符转义
var patt=new RegExp(keyword ,'igm');
var str2=str.replace(patt,"<span class='highlight'>$1</span>");
console.log(str2);

CSS代码：

.highlight 
    color: #0FA9F6;