javascript - Chrome 扩展 : Get Parameter from URL

Question

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Answer 1

要在单个正则表达式中获取查询字符串，请使用:

var queryString = /^[^#?]*(\?[^#]+|)/.exec(tab.url)[1];
// Explanation of RegEx:
// ^[^#?]*                          (\?[^#]+   | )
// <Starts with any non-#/? string><query string OR nothing>

然后，使用以下函数获取特定键的值:

function getParameterByName(queryString, name) {
    // Escape special RegExp characters
    name = name.replace(/[[^$.|?*+(){}\\]/g, '\\$&');
    // Create Regular expression
    var regex = new RegExp("(?:[?&]|^)" + name + "=([^&#]*)");
    // Attempt to get a match
    var results = regex.exec(queryString);
    return decodeURIComponent(results[1].replace(/\+/g, " ")) || '';
}

// Usage:
// Example: tab.url = "http://example.com/path?foo=bar&key_name=qs_value#"
var queryString = /\?[^#]+(?=#|$)|$/.exec(tab.url)[0];
var value = getParameterByName(queryString, 'qs_name');
// Result : value = "value";

// Example 2: Using the function to get a parameter from the current page's URL.
//  (e.g inside content script)
var value = getParameterByName(location.search, 'qs_name');
// Result : value = "value"