检查字符串是否以某事开头？ [英] Check if string begins with something?

问题描述

可能重复：

Javascript StartsWith

我知道我可以做^ =看看是否有id从一些东西开始，我尝试使用它，但它没有用...基本上，我正在检索网址，我想为一个以某种方式开始的路径名元素设置一个类...

I know that I can do like ^= to see if an id starts with something, and I tried using that for this, but it didn't work... Basically, I'm retrieving the url and I want to set a class for an element for pathnames that start in a certain way...

所以，

var pathname = window.location.pathname;  //gives me /sub/1/train/yonks/459087

我想确保为每个以/ sub / 1开头的路径，我都可以为元素设置一个类......

I want to make sure that for every path that starts with /sub/1, I can set a class for an element...

if(pathname ^= '/sub/1') {  //this didn't work... 
        ... 

推荐答案

使用 stringObject.substring

if (pathname.substring(0, 6) == "/sub/1") {
    // ...
}

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