無法創建正則表達式的類名稱

Question

當我嘗試創建span元素的類名稱，出現錯誤。

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

Answer 1

逃離「字符替換

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

console.log(str); 

輸出：

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