How to set parameters for jquery url

jQuery is a popular JavaScript framework that can help us quickly operate the DOM and achieve dynamic effects. Modifying URL parameters is a function we often need. In the process of using jQuery, we can simply code to implement this function.

First, we need to get the URL address of the current page, which can be achieved using JavaScript's window.location object:

var url = window.location.href;

This code will get the complete URL address of the current page, including protocol, Information such as host name, path and parameters. Next, we need to parse the URL and obtain the parameter information.

In JavaScript, there are many ways to parse URLs, one of the simpler methods is to use regular expressions. The following is a simple regular expression for parsing URLs:

var reg = /[\?&]([^=&#]+)=([^&#]*)/g;

This regular expression will match all parameters in the URL and store them in an object in the form of key-value pairs. We can use the following code to parse the parameter into an object:

var params = {};
while (match = reg.exec(url)) {
    params[match[1]] = match[2];
}

The parsed parameters are stored in the params object, and we can obtain the corresponding value through params[key].

Next, we can modify the parameters. Suppose we want to modify the parameter value with the key "page", we can use the following code:

var newPageValue = 2;
params["page"] = newPageValue;

Finally, we need to splice the modified parameters into the URL, which can also be achieved using JavaScript string operations. .

var newUrl = url.split('?')[0] + '?';
for (var key in params) {
    newUrl += key + '=' + params[key] + '&';
}
newUrl = newUrl.substring(0, newUrl.length - 1);

This code will re-splice the parsed parameters into the URL and return a new URL address. We can use window.location.href to jump to the new address.

The final code is as follows:

var url = window.location.href;
var reg = /[\?&]([^=&#]+)=([^&#]*)/g;
var params = {};
while (match = reg.exec(url)) {
    params[match[1]] = match[2];
}

var newPageValue = 2;
params["page"] = newPageValue;

var newUrl = url.split('?')[0] + '?';
for (var key in params) {
    newUrl += key + '=' + params[key] + '&';
}
newUrl = newUrl.substring(0, newUrl.length - 1);

window.location.href = newUrl;

The above are the steps and code examples for using jQuery to modify URL parameters. In actual applications, we can modify and optimize according to specific needs to achieve more flexible and efficient operations.

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