What technologies are there in ajax?
ajax technologies include XMLHttpRequest, JavaScript, DOM, CSS, XML, XSLT, callback functions, event processing, Promise, asynchronous programming, plug-ins and libraries, etc. Detailed introduction: 1. XMLHttpRequest, which is the core of AJAX. It is a JavaScript object used to send HTTP or HTTPS requests between the browser and the server; 2. JavaScript is the most commonly used programming language in AJAX, etc.
The operating system for this tutorial: Windows 10 system, DELL G3 computer.
AJAX is a web development technology that uses multiple technologies, including HTML or XHTML, CSS, JavaScript, DOM, XML, XSLT, and most importantly, the XMLHttpRequest object. AJAX is not a single technology, but a combination of multiple technologies. Using AJAX, you can exchange data with the server through asynchronous HTTP requests without refreshing the entire page. This allows developers to create more efficient and faster user interfaces and provide a better experience for end users.
When developing AJAX applications, there are many techniques available to speed up development and simplify code. The following are some common AJAX technologies:
1. XMLHttpRequest: This is the core of AJAX. It is a JavaScript object used to send HTTP or HTTPS requests between the browser and the server. XMLHttpRequest can be used to obtain data on the server or send data to the server.
2. JavaScript: JavaScript is the most commonly used programming language in AJAX. It is used to process user interfaces, send HTTP requests, and process responses returned by the server. JavaScript is also used to process XML and JSON data, as well as implement dynamic content and other AJAX functionality.
3. DOM: DOM (Document Object Model) is an interface for representing and interacting with the structure of HTML or XML documents. In AJAX, the DOM is used to dynamically change the content and structure of a web page, such as adding, modifying, or removing HTML elements.
4. CSS: CSS (cascading style sheets) is used to set the style and layout of web pages. In AJAX, CSS can be used to change the style of user interface elements based on their state, such as displaying a loading indicator when data is loading.
5. XML: XML (Extensible Markup Language) is a format used to store and transmit data. In AJAX, XML is often used to pass data to or get data from the server. JSON (JavaScript Object Notation) is a lightweight data exchange format that uses JavaScript syntax to represent data structures. In AJAX, JSON can be used to get data from the server, and the data can be easily parsed and used in JavaScript.
6. XSLT: XSLT (Extensible Stylesheet Language Transformation) is a language used to transform XML data. In AJAX, XSLT can be used to convert XML data into HTML or other formats for display on a user interface.
7. Callback function: In AJAX, callback function is an important technology used to process the response data returned by the server. A callback function is a JavaScript function that is called after receiving a response from the server to update the user interface or perform other actions based on the response data.
8. Event handling: Event handling is an integral part of AJAX. It allows you to listen for user interface events (such as clicks, keyboard input, etc.) and execute JavaScript code when these events occur. In AJAX, event handlers can be used to handle user interactions, such as sending an HTTP request when a form is submitted or a button is clicked.
9. Promise and asynchronous programming: Promise is a pattern for handling asynchronous operations. In AJAX, Promise can be used to handle asynchronous HTTP requests, and multiple Promises can be called in a chain to complete complex asynchronous operations. Asynchronous programming avoids blocking the user interface and improves performance.
10. Plug-ins and libraries: There are many JavaScript plug-ins and libraries available to simplify AJAX development. For example jQuery, Axios, Fetch API, etc. These libraries and plugins provide clean and concise APIs and convenient methods for handling AJAX request and response data.
These techniques are commonly used tools and techniques in AJAX, but the specific choice depends on the needs of the project and the preferences of the development team. Use these techniques to speed development, improve performance, and simplify code.
The above is the detailed content of What technologies are there in ajax?. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics











Build an autocomplete suggestion engine using PHP and Ajax: Server-side script: handles Ajax requests and returns suggestions (autocomplete.php). Client script: Send Ajax request and display suggestions (autocomplete.js). Practical case: Include script in HTML page and specify search-input element identifier.

Title: Methods and code examples to resolve 403 errors in jQuery AJAX requests. The 403 error refers to a request that the server prohibits access to a resource. This error usually occurs because the request lacks permissions or is rejected by the server. When making jQueryAJAX requests, you sometimes encounter this situation. This article will introduce how to solve this problem and provide code examples. Solution: Check permissions: First ensure that the requested URL address is correct and verify that you have sufficient permissions to access the resource.

jQuery is a popular JavaScript library used to simplify client-side development. AJAX is a technology that sends asynchronous requests and interacts with the server without reloading the entire web page. However, when using jQuery to make AJAX requests, you sometimes encounter 403 errors. 403 errors are usually server-denied access errors, possibly due to security policy or permission issues. In this article, we will discuss how to resolve jQueryAJAX request encountering 403 error

How to solve the problem of jQueryAJAX error 403? When developing web applications, jQuery is often used to send asynchronous requests. However, sometimes you may encounter error code 403 when using jQueryAJAX, indicating that access is forbidden by the server. This is usually caused by server-side security settings, but there are ways to work around it. This article will introduce how to solve the problem of jQueryAJAX error 403 and provide specific code examples. 1. to make

Using Ajax to obtain variables from PHP methods is a common scenario in web development. Through Ajax, the page can be dynamically obtained without refreshing the data. In this article, we will introduce how to use Ajax to get variables from PHP methods, and provide specific code examples. First, we need to write a PHP file to handle the Ajax request and return the required variables. Here is sample code for a simple PHP file getData.php:

Ajax (Asynchronous JavaScript and XML) allows adding dynamic content without reloading the page. Using PHP and Ajax, you can dynamically load a product list: HTML creates a page with a container element, and the Ajax request adds the data to that element after loading it. JavaScript uses Ajax to send a request to the server through XMLHttpRequest to obtain product data in JSON format from the server. PHP uses MySQL to query product data from the database and encode it into JSON format. JavaScript parses the JSON data and displays it in the page container. Clicking the button triggers an Ajax request to load the product list.

In order to improve Ajax security, there are several methods: CSRF protection: generate a token and send it to the client, add it to the server side in the request for verification. XSS protection: Use htmlspecialchars() to filter input to prevent malicious script injection. Content-Security-Policy header: Restrict the loading of malicious resources and specify the sources from which scripts and style sheets are allowed to be loaded. Validate server-side input: Validate input received from Ajax requests to prevent attackers from exploiting input vulnerabilities. Use secure Ajax libraries: Take advantage of automatic CSRF protection modules provided by libraries such as jQuery.

Ajax is not a specific version, but a technology that uses a collection of technologies to asynchronously load and update web page content. Ajax does not have a specific version number, but there are some variations or extensions of ajax: 1. jQuery AJAX; 2. Axios; 3. Fetch API; 4. JSONP; 5. XMLHttpRequest Level 2; 6. WebSockets; 7. Server-Sent Events; 8, GraphQL, etc.
