jquery jumps to the control layer

In front-end development, jQuery is a commonly used JavaScript library, which provides simple and easy-to-use methods for manipulating the DOM and handling events. In web applications, sometimes we need to jump and control pages through jQuery, but this requires us to master some basic knowledge and skills.

This article will introduce how to use jQuery to jump to the control layer, including the following aspects:

1. Get URL information
2. Modify URL information
3. Jump to the control layer
4. Summary
5. Get URL information

Before using jQuery to jump to the page, we need to first get the URL of the current page information. This can be achieved through the location object in JavaScript. The location object contains the URL information of the page, such as the current URL, the page's protocol, host address, path and parameters, etc.

We can use the following code to get the URL information of the current page:

var currentUrl = window.location.href;

This code can get the complete URL link of the current page.

If we need to get the parameters in the specified URL information, we can use the following code:

function getParameterByName(name) {
    name = name.replace(/[[]/, "\[").replace(/[]]/, "\]");
    var regex = new RegExp("[\?&]" + name + "=([^&#]*)"),
    results = regex.exec(location.search);
    return results === null ? "" : decodeURIComponent(results[1].replace(/+/g, " "));
}

This function receives a parameter name and returns the value corresponding to the parameter in the URL.

2. Modify URL information

After obtaining the URL information, we may need to modify some of its values, such as parameter values, paths, etc. We can use jQuery's attr() method to modify the URL information.

The following is an example of modifying the URL path:

var currentUrl = window.location.href;
var newUrl = currentUrl.replace("oldPath/", "newPath/");
$(location).attr("href", newUrl);

This code obtains the URL information of the current page, then uses the replace() method to replace the old path with the new path, and uses attr () method assigns the modified URL to the href attribute of the window. This will jump to the page corresponding to the new path.

3. Jump to the control layer

In actual applications, we may need to add a control layer when the page jumps. This can be achieved using jQuery's Ajax method. Ajax is a technology for sending and receiving data in a page, which allows updating parts of the page without refreshing the entire page.

The following is an example of using Ajax to jump to the control layer:

$.ajax({
    type: "POST",
    url: "control.php",
    data: "id=1&name=Tom",
    success: function(){
        alert("成功跳转到控制层！");
    }
});

This code uses Ajax to pass the parameter id and name of the current page to the control layer, and pops up when the call is successful. A prompt box. This allows you to jump to the control layer without refreshing the entire page.

4. Summary

In this article, we introduced how to use jQuery to jump to the control layer. First, you need to obtain the URL information of the current page, and then use the attr() method to modify it. Finally, Ajax can be used to achieve page jump and control. Mastering these skills can help us better implement page jumps and control in web applications.

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