从字符串开头删除特定的字符串？

Question

我的代码：

var pathname = window.location.pathname;
//output of pathname is "/removethis/page/removethis/color.html"


var string = "/removethis/";

if (pathname.match("^"+string)) {
   pathname = preg_replace(string, '', pathname);
}

alert(pathname);

输出为：

我尝试找出字符串的开头是否与/something/匹配，如果是，则从"pathname";的开头删除该字符串

我期望的是：

page/removethis/color.html

但是我得到了错误

preg_replace is not defined

Answer 1

您需要在JavaScript中使用.replace()，preg_replace()用于PHP。

尝试一下：

pathname = pathname.replace(string, '')

Answer 2

您可以使用RegExp一次性完成

var pathname = "/removethis/page/removethis/color.html";

var string = "/removethis/";
var regex = new RegExp("^" + string);
console.log(pathname.replace(regex,""));

Answer 3

您需要删除正则表达式周围的引号。

var pathname = "/removethis/page/removethis/color.html";
//output of pathname is "/removethis/page/removethis/color.html"


var regex = /^\/removethis/;

if (pathname.match(regex)) {
   pathname = pathname.replace(regex, '');
}

alert(pathname);