javascript - 从 url 查询字符串中获取特定值

Question

我有以下 URL，我想使用 JavaScript 从中获取“id”值。

https://www.blabla.com/ebookedit?id=B0077RQGX4&commit=Go

I started with this code:

var url = document.URL;
var id_check = /^\id...\E; // NOT SURE HERE
var final_id = new RegExp(id_check,url);

我想提取 ID“B0077RQGX4”并将其保存到我稍后修改的变量中。我该怎么做，我会在 JavaScript 中使用哪些函数？

Answer 1

我想到了这个:

var final_id;
var url = document.URL;
var id_check = /[?&]id=([^&]+)/i;
var match = id_check.exec(url);
if (match != null) {
    final_id = match[1];
} else {
    final_id = "";
}

适用于:

https://www.blabla.com/ebookedit?id=B0077RQGX4&commit=Go
final_id = 'B0077RQGX4'

https://www.blabla.com/ebookedit?SomethingElse=Something&id=B0077RQGX4&commit=Go
final_id = 'B0077RQGX4'

https://www.blabla.com/ebookedit?commit=go&id=B0077RQGX4
final_id = 'B0077RQGX4'

https://www.blabla.com/ebookedit?commit=Go
final_id = ''

https://www.blabla.com/ebookedit?id=1234&Something=1&id=B0077RQGX4&commit=Go
final_id = '1234'