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如何在 JavaScript 中获取查询字符串值?

Is there a plugin-less way of retrieving query string values via jQuery (or without)?

If so, how? If not, is there a plugin which can do so?

转载于:https://stackoverflow.com/questions/901115/how-can-i-get-query-string-values-in-javascript

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  • larry*wei 2012-07-26 20:29
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    Update: Sep-2018

    You can use URLSearchParams which is simple and has good browser support.

    const urlParams = new URLSearchParams(window.location.search);
    const myParam = urlParams.get('myParam');
    

    Orignal

    You don't need jQuery for that purpose. You can use just some pure JavaScript:

    function getParameterByName(name, url) {
        if (!url) url = window.location.href;
        name = name.replace(/[\[\]]/g, '\\$&');
        var regex = new RegExp('[?&]' + name + '(=([^&#]*)|&|#|$)'),
            results = regex.exec(url);
        if (!results) return null;
        if (!results[2]) return '';
        return decodeURIComponent(results[2].replace(/\+/g, ' '));
    }
    

    Usage:

    // query string: ?foo=lorem&bar=&baz
    var foo = getParameterByName('foo'); // "lorem"
    var bar = getParameterByName('bar'); // "" (present with empty value)
    var baz = getParameterByName('baz'); // "" (present with no value)
    var qux = getParameterByName('qux'); // null (absent)
    


    Note: If a parameter is present several times (?foo=lorem&foo=ipsum), you will get the first value (lorem). There is no standard about this and usages vary, see for example this question: Authoritative position of duplicate HTTP GET query keys.
    NOTE: The function is case-sensitive. If you prefer case-insensitive parameter name, add 'i' modifier to RegExp


    This is an update based on the new URLSearchParams specs to achieve the same result more succinctly. See answer titled "URLSearchParams" below.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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