javascript - 为什么这个正则表达式输出不正确？

Question

var re = /apples/gi;  
var str = "Apples are round, and apples are juicy.";  
var newstr = str.replace("apples", "oranges","gi");
document.write(newstr);

它应该输出 oranges are round, and oranges are juicy. ，因为不区分大小写，而是输出 Apples are round, and oranges are juicy.

为什么？？

Answer 1

没有 .replace()使用该签名的方法，而是使用您创建的正则表达式，如下所示:

var re = /apples/gi;  
var str = "Apples are round, and apples are juicy.";  
var newstr = str.replace(re, "oranges");

You can test it here .