考虑:
http://example.com/page.html?returnurl=%2Fadmin
对于page.html内的js，它如何检索GET参数?
对于上面的简单例子，func('returnurl')应该是/admin。
但它也应该适用于复杂的查询字符串…
当前回答
你应该使用URL和URLSearchParams本地函数:
let url = new url ("https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8&q=mdn%20query%20string") let params = new URLSearchParams(url.search); Let sourceid = params.get('sourceid') // 'chrome-instant' Let q = params.get('q') // 'mdn查询字符串' 让ie = params.has('ie') // true params.append(“平”、“乒乓球”) console.log (sourceid) console.log (q) console.log (ie) console.log (params.toString ()) console.log (params.get(“平”))
https://developer.mozilla.org/en-US/docs/Web/API/URLSearchParams https://polyfill.io/v2/docs/features/
其他回答
你应该使用URL和URLSearchParams本地函数:
let url = new url ("https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8&q=mdn%20query%20string") let params = new URLSearchParams(url.search); Let sourceid = params.get('sourceid') // 'chrome-instant' Let q = params.get('q') // 'mdn查询字符串' 让ie = params.has('ie') // true params.append(“平”、“乒乓球”) console.log (sourceid) console.log (q) console.log (ie) console.log (params.toString ()) console.log (params.get(“平”))
https://developer.mozilla.org/en-US/docs/Web/API/URLSearchParams https://polyfill.io/v2/docs/features/
我的解决方案扩展了@tak3r的。
当没有查询参数时返回空对象，并支持数组符号?a=1&a=2&a=3:
function getQueryParams () {
function identity (e) { return e; }
function toKeyValue (params, param) {
var keyValue = param.split('=');
var key = keyValue[0], value = keyValue[1];
params[key] = params[key]?[value].concat(params[key]):value;
return params;
}
return decodeURIComponent(window.location.search).
replace(/^\?/, '').split('&').
filter(identity).
reduce(toKeyValue, {});
}
我创建了一个简单的JavaScript函数来从URL访问GET参数。
只要包含这个JavaScript源代码，就可以访问get参数。 例如:在http://example.com/index.php?language=french中，语言变量可以通过$_GET["language"]访问。类似地，所有参数的列表将作为数组存储在变量$_GET_Params中。JavaScript和HTML都在下面的代码片段中提供:
<!DOCTYPE html> <html> <body> <!-- This script is required --> <script> function $_GET() { // Get the Full href of the page e.g. http://www.google.com/files/script.php?v=1.8.7&country=india var href = window.location.href; // Get the protocol e.g. http var protocol = window.location.protocol + "//"; // Get the host name e.g. www.google.com var hostname = window.location.hostname; // Get the pathname e.g. /files/script.php var pathname = window.location.pathname; // Remove protocol part var queries = href.replace(protocol, ''); // Remove host part queries = queries.replace(hostname, ''); // Remove pathname part queries = queries.replace(pathname, ''); // Presently, what is left in the variable queries is : ?v=1.8.7&country=india // Perform query functions if present if (queries != "" && queries != "?") { // Remove question mark '?' queries = queries.slice(1); // Split all the different queries queries = queries.split("&"); // Get the number of queries var length = queries.length; // Declare global variables to store keys and elements $_GET_Params = new Array(); $_GET = {}; // Perform functions per query for (var i = 0; i < length; i++) { // Get the present query var key = queries[i]; // Split the query and the value key = key.split("="); // Assign value to the $_GET variable $_GET[key[0]] = [key[1]]; // Assign value to the $_GET_Params variable $_GET_Params[i] = key[0]; } } } // Execute the function $_GET(); </script> <h1>GET Parameters</h1> <h2>Try to insert some get parameter and access it through JavaScript</h2> </body> </html>
我这样做(检索一个特定的get-parameter，这里'parameterName'):
var parameterValue = decodeURIComponent(window.location.search.match(/(\?|&)parameterName\=([^&]*)/)[2]);
这是另一个基于Kat和Bakudan例子的例子，但让它更通用一点。
function getParams ()
{
var result = {};
var tmp = [];
location.search
.substr (1)
.split ("&")
.forEach (function (item)
{
tmp = item.split ("=");
result [tmp[0]] = decodeURIComponent (tmp[1]);
});
return result;
}
location.getParams = getParams;
console.log (location.getParams());
console.log (location.getParams()["returnurl"]);
