我编写了一个函数，它可以有效地产生预期的行为，而无需使用任何库或框架。 动态演示可以在 this fiddle:http://jsfiddle.net/w8D2G/1/
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定义：
下面的“用法”部分将使用显示的示例值
- Haystack - 要搜索的字符串（默认 = 查询字符串。例如：?size=small,medium）
- Needle - 搜索的关键。示例：size
- Value - 要替换/添加的值。示例：medium。
用法（例如：input > output）：
-
qs_replace(needle, value)
如果值存在，删除：?size=small,medium > ?size=small
如果值不存在，添加：?size=small > size=small,medium
-
qs_replace(needle, options) 对象选项。公认的选项：
-
find
字符串。如果值存在则返回true，否则返回false。
-
add、remove 或 toggle
字符串。在needle 中添加/删除给定值。如果使用remove，并且该值是唯一值，则needle 也会被删除。如果值已经存在，则不会添加。
-
ignorecase
在查找搜索词时忽略大小写（needle、add、remove 或 find）。
-
separator
指定分隔符以分隔 needle 的值。默认为逗号 (,)。
注意：还可以为 String haystack 定义不同的值，方法是将其添加为第一个参数：qs_replace(haystack, needle, value) 或 qs_replace(haystack, needle, options)
代码（底部示例）。 小提琴：http://jsfiddle.net/w8D2G/1/：
function qs_replace(haystack, needle, options) {
if(!haystack || !needle) return ""; // Without a haystack or needle.. Bye
else if(typeof needle == "object") {
options = needle;
needle = haystack;
haystack = location.search;
} else if(typeof options == "undefined") {
options = needle;
needle = haystack;
haystack = location.search;
}
if(typeof options == "string" && options != "") {
options = {remove: options};
var toggle = true;
} else if(typeof options != "object" || options === null) {
return haystack;
} else {
var toggle = !!options.toggle;
if (toggle) {
options.remove = options.toggle;
options.toggle = void 0;
}
}
var find = options.find,
add = options.add,
remove = options.remove || options.del, //declare remove
sep = options.sep || options.separator || ",", //Commas, by default
flags = (options.ignorecase ? "i" :"");
needle = encodeURIComponent(needle); //URL-encoding
var pattern = regexp_special_chars(needle);
pattern = "([?&])(" + pattern + ")(=|&|$)([^&]*)(&|$)";
pattern = new RegExp(pattern, flags);
var subquery_match = haystack.match(pattern);
var before = /\?/.test(haystack) ? "&" : "?"; //Use ? if not existent, otherwise &
var re_sep = regexp_special_chars(sep);
if (!add || find) { //add is not defined, or find is used
var original_remove = remove;
if (subquery_match) {
remove = encodeURIComponent(remove);
remove = regexp_special_chars(remove);
remove = "(^|" + re_sep + ")(" + remove + ")(" + re_sep + "|$)";
remove = new RegExp(remove, flags);
var fail = subquery_match[4].match(remove);
} else {
var fail = false;
}
if (!add && !fail && toggle) add = original_remove;
}
if(find) return !!subquery_match || fail;
if (add) { //add is a string, defined previously
add = encodeURIComponent(add);
if(subquery_match) {
var re_add = regexp_special_chars(add);
re_add = "(^|" + re_sep + ")(" + re_add + ")(?=" + re_sep + "|$)";
re_add = new RegExp(re_add, flags);
if (subquery_match && re_add.test(subquery_match[4])) {
return haystack;
}
if (subquery_match[3] != "=") {
subquery_match = "$1$2=" + add + "$4$5";
} else {
subquery_match = "$1$2=$4" + sep + add + "$5";
}
return haystack.replace(pattern, subquery_match);
} else {
return haystack + before + needle + "=" + add;
}
} else if(subquery_match){ // Remove part. We can only remove if a needle exist
if(subquery_match[3] != "="){
return haystack;
} else {
return haystack.replace(pattern, function(match, prefix, key, separator, value, trailing_sep){
// The whole match, example: &foo=bar,doo
// will be replaced by the return value of this function
var newValue = value.replace(remove, function(m, pre, bye, post){
return pre == sep && post == sep ? sep : pre == "?" ? "?" : "";
});
if(newValue) { //If the value has any content
return prefix + key + separator + newValue + trailing_sep;
} else {
return prefix == "?" ? "?" : trailing_sep; //No value, also remove needle
}
}); //End of haystack.replace
} //End of else if
} else {
return haystack;
}
// Convert string to RegExp-safe string
function regexp_special_chars(s){
return s.replace(/([[^$.|?*+(){}\\])/g, '\\$1');
}
}
示例（小提琴：http://jsfiddle.net/w8D2G/1/）：
qs_replace('color', 'red'); //Toggle color=red
qs_replace('size', {add: 'medium'}); //Add `medium` if not exist to size
var starting_url = 'http://example.com?color=red&size=small,medium,large&shape=round'
starting_url = qs_replace(starting_url, 'color', 'red'); //Toggle red, thus remove
starting_url = qs_replace(starting_url, 'color', 'red'); //Toggle red, so add it
alert(starting_url);