Javascript 使用JS从url获取变量
可能重复: 我有这个链接 url/merchant.html?id=45 我正在尝试使用JS或JQuery获取ID,但运气不好 我试过这个密码Javascript 使用JS从url获取变量,javascript,jquery,regex,Javascript,Jquery,Regex,可能重复: 我有这个链接 url/merchant.html?id=45 我正在尝试使用JS或JQuery获取ID,但运气不好 我试过这个密码 var urlParams = {}; (function () { var match, pl = /\+/g, // Regex for replacing addition symbol with a space search = /([^&=]+)=?([^&]*)/g,
var urlParams = {};
(function () {
var match,
pl = /\+/g, // Regex for replacing addition symbol with a space
search = /([^&=]+)=?([^&]*)/g,
decode = function (s) { return decodeURIComponent(s.replace(pl, " ")); },
query = window.location.search.substring(1);
while (match = search.exec(query))
urlParams[decode(match[1])] = decode(match[2]);
})();
它返回未定义的
代码有什么问题?请在此处使用:
function getParameterByName(name)
{
name = name.replace(/[\[]/, "\\\[").replace(/[\]]/, "\\\]");
var regexS = "[\\?&]" + name + "=([^&#]*)";
var regex = new RegExp(regexS);
var results = regex.exec(window.location.search);
if(results == null)
return "";
else
return decodeURIComponent(results[1].replace(/\+/g, " "));
}
因此,在你的情况下:
getParameterByName("id")
发件人:
我不久前写了这个函数:
/**
* Retrieves the value of a query string parameter.
* @param string href The full URL
* @param string key The key in the query string to search for.
* @param variant def The default value to return if the key doesn't exist.
* @returns variant if key exists returns the value, otherwise returns a default value.
*/
function getURIParam(href, key, def) {
if (arguments.length == 2) def = null;
var qs = href.substring(href.indexOf('?') + 1);
var s = qs.split('&');
for (var k in s) {
var s2 = s[k].split('=');
if (s2[0] == key)
return decodeURIComponent(s2[1]);
}
return def;
}
您可以这样使用它:
var href = "http://www.example.org?id=1492";
var id = getURIParam(href, "id", 0);
//Output of id: 1492
如果密钥不存在:
var href = "http://www.example.org?id=1492";
var name = getURIParam(href, "name", "Unnamed");
//Output of name: Unnamed
document.location.href?您的代码刚刚在FF linux中为我工作,没有任何修改…谢谢。。。这对我起作用了