使用 JavaScript 向 URL 添加参数

本文介绍了使用 JavaScript 向 URL 添加参数的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

在使用 AJAX 调用的 Web 应用程序中，我需要提交请求但在 URL 末尾添加一个参数，例如:

In a web application that makes use of AJAX calls, I need to submit a request but add a parameter to the end of the URL, for example:

原始网址:

server/myapp.php?id=10

结果网址:

server/myapp.php?id=10&启用=真

寻找一个 JavaScript 函数来解析 URL，查看每个参数，然后添加新参数或更新值(如果已经存在).

Looking for a JavaScript function which parses the URL looking at each parameter, then adds the new parameter or updates the value if one already exists.

推荐答案

您需要调整的基本实现如下所示:

A basic implementation which you'll need to adapt would look something like this:

function insertParam(key, value) { key = encodeURIComponent(key); value = encodeURIComponent(value); // kvp looks like ['key1=value1', 'key2=value2', ...] var kvp = document.location.search.substr(1).split('&'); let i=0; for(; i<kvp.length; i++){ if (kvp[i].startsWith(key + '=')) { let pair = kvp[i].split('='); pair[1] = value; kvp[i] = pair.join('='); break; } } if(i >= kvp.length){ kvp[kvp.length] = [key,value].join('='); } // can return this or... let params = kvp.join('&'); // reload page with new params document.location.search = params; }

这大约是基于正则表达式或基于搜索的解决方案的两倍，但这完全取决于查询字符串的长度和任何匹配项的索引

This is approximately twice as fast as a regex or search based solution, but that depends completely on the length of the querystring and the index of any match

我为了完成而进行基准测试的慢速正则表达式方法(大约慢 150%)

the slow regex method I benchmarked against for completions sake (approx +150% slower)

function insertParam2(key,value) { key = encodeURIComponent(key); value = encodeURIComponent(value); var s = document.location.search; var kvp = key+"="+value; var r = new RegExp("(&|\?)"+key+"=[^&]*"); s = s.replace(r,"$1"+kvp); if(!RegExp.$1) {s += (s.length>0 ? '&' : '?') + kvp;}; //again, do what you will here document.location.search = s; }