无法创建正则表达式的类名称

Question

当我尝试创建span元素的类名称，出现错误。

var regex = new RegExp("(" + input + ")", "im"); 
str = str.replace(regex, ("<span class="name">$1</span>"));   

Answer 1

逃离“字符替换

var input = 'i'; 
var str = 'kaixo'; 
var pattern = new RegExp("(" + input + ")", "gim"); 
str = str.replace(pattern, ("<span class=\"target\">$1</span>")); 

console.log(str); 

输出：

ka<span class="target">i</span>xo