Example of asynchronous file upload in html

Copy code

The code is as follows:

Copy code

The code is as follows:

This is the most common and simplest form submission method in HTML, but this method must switch pages. Maybe sometimes we want to interact with the server on the same page and do not want to switch to another page after submitting the form. What should we do? Here are several ways to submit forms.
First, let me introduce a solution that saves the country by taking a detour. The above code snippet does not need to be changed, just add the following code

Copy code

The code is as follows:

And add the target attribute in the form, target=uploadFrame. The target attribute needs to be consistent with the value of the id in the iframe (or the value of the name attribute, you will know after trying it).

To explain briefly, our form is refreshed after submission, but why is there no page jump? It's because of the iframe. In fact, we refreshed in the iframe, and the iframe is empty, which is the same as not refreshing. It gives us an asynchronous feeling. This is not an orthodox method, but it is a roundabout way to save the country. Of course, this method is not applicable in many cases. For example, we hope to retrieve something from the server after submitting the form. This method is obviously not feasible. Here we also need a truly asynchronous submission form.

(II) jQuery asynchronous form submission

Here we introduce a jQuery form submission plug-in ajaxupload, which is also relatively simple to use.

Copy code

The code is as follows:

<body>
<form action="/hehe" method="post">
<input type="text" value="hehe"/>
<input type="button" value="upload" id="upload"/>

</form>
<script>
(function(){
new AjaxUpload("#upload", {
action: '/hehe',
type:"post",
data: {},
name: 'textfield',
onSubmit: function(file, ext) {
alert("Upload successful");
},
onComplete: function(file, response) {
}
});
})();
</script>
</body>

The main code is posted here. After the page rendering is completed, we use a self-executing function to add an asynchronous upload event to the button with the id upload. The id in new AjaxUpload (id, object) corresponds to the id of the bound object. As for the second parameter, data is the additional data, name can be arbitrary, onSubmit function is the callback function before uploading the file, the first parameter file is the file name, ext is the file suffix, and the onComplete function can process the data returned by the server. The above are two simple file upload client implementations.

<<: MySQL scheduled full database backup

>>: Detailed explanation of adding click event in echarts tooltip in Vue

How to install and persist the postgresql database in docker

Example of asynchronous file upload in html

How to install and persist the postgresql database in docker

MySQL 5.7.17 winx64 installation and configuration graphic tutorial

JavaScript article will show you how to play with web forms

Vue implements the magnifying glass function of the product details page

React diff algorithm source code analysis

Solve the problem of garbled data in MySQL database migration

iframe multi-layer nesting, unlimited nesting, highly adaptive solution

Implementation of HTTP and HTTPS services with Nginx reverse proxy for multiple domain names

A "classic" pitfall of MySQL UPDATE statement

Implementation of tomcat deployment project and integration with IDEA

Recommend

SQL Practice Exercise: Online Mall Database User Information Data Operation

How to set up a shared folder on a vmware16 virtual machine

XHTML Getting Started Tutorial: XHTML Tags

In-depth explanation of MySQL stored procedures (in, out, inout)

Detailed steps for Linux firewall configuration (based on yum warehouse configuration)

Example code for implementing large screen adaptation on PC using vue+px2rem (rem adaptation)

I have compiled a few cool design sites that I think are good.

jQuery achieves full screen scrolling effect

Nine advanced methods for deduplicating JS arrays (proven and effective)

Detailed explanation of MySQL 8.0 dictionary table enhancement

Randomly generate an eight-digit discount code and save it to the MySQL database

Not all pop-ups are rogue. Tips on designing website pop-ups

How to use DQL commands to query data in MySQL

Docker cross-server communication overlay solution (Part 1) Consul single instance

MySQL msi installation tutorial under windows10 with pictures and text