如何编写一个if语句,当var MyString不在var URL中时会发出警告?
var URL = "http://test.mysite.com/about/";
var MyString = "mysite.com";
答案 0 :(得分:4)
if (URL.indexOf(MyString) === -1) {
alert('Not found!');
}
答案 1 :(得分:0)
if(URL.indexOf(MyString) == -1) alert("Not found");