Home Web Front-end HTML Tutorial How to get data in html

How to get data in html

Apr 11, 2024 pm 02:00 PM
data access html element

HTML cannot obtain data directly. Methods of obtaining data include using JavaScript to obtain data through HTML elements or sending AJAX requests. Use server-side scripting languages ​​to connect to databases or other data sources, or to call APIs.

How to get data in html

How HTML gets data

Introduction
HTML itself does not have the ability to get data capabilities, it is simply a markup language used to define the structure and content of web pages. In order to obtain data, we need to resort to other technologies such as JavaScript, AJAX or server-side scripting languages.

Get data using JavaScript
JavaScript is a client-side scripting language that can run in the browser. We can use JavaScript to get data in the following ways:

  • Get data from HTML elements: Use document.getElementById(), document.querySelector () and other methods, we can get the data in the HTML element.
  • AJAX request via XMLHttpRequest object: AJAX (Asynchronous JavaScript and XML) allows us to communicate with the server without reloading the page. We can use the XMLHttpRequest object to send HTTP requests and receive response data.
  • Use JavaScript frameworks: JavaScript frameworks such as jQuery provide convenient ways to handle AJAX requests and data manipulation.

Get data using server-side scripting languages
Server-side scripting languages, such as PHP, ASP.NET or Node.js, can be executed on the server. We can use server-side scripting languages ​​to connect to databases or other data sources to get data.

  • Query directly from the database: We can use SQL (Structured Query Language) to connect directly to the database and execute queries to get the data.
  • Use ORM (Object Relational Mapper): ORM allows us to interact with the database using object-based programming, which can simplify data access.
  • Using API (Application Programming Interface): API allows us to interact with third-party applications or services and obtain data.

Additional Notes

  • For simple data retrieval tasks, JavaScript's AJAX methods are usually the most convenient.
  • For tasks that require processing large amounts of data or interacting with a database, a server-side scripting language may be a better choice.
  • Understanding data security and privacy issues is critical and appropriate measures should be taken when obtaining and processing data.

The above is the detailed content of How to get data in html. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undress AI Tool

Undress AI Tool

Undress images for free

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

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

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Hot Topics

PHP Tutorial
1504
276
Can mysql and mariadb coexist Can mysql and mariadb coexist Apr 08, 2025 pm 02:27 PM

MySQL and MariaDB can coexist, but need to be configured with caution. The key is to allocate different port numbers and data directories to each database, and adjust parameters such as memory allocation and cache size. Connection pooling, application configuration, and version differences also need to be considered and need to be carefully tested and planned to avoid pitfalls. Running two databases simultaneously can cause performance problems in situations where resources are limited.

What are the common methods for program performance optimization? What are the common methods for program performance optimization? May 09, 2024 am 09:57 AM

Program performance optimization methods include: Algorithm optimization: Choose an algorithm with lower time complexity and reduce loops and conditional statements. Data structure selection: Select appropriate data structures based on data access patterns, such as lookup trees and hash tables. Memory optimization: avoid creating unnecessary objects, release memory that is no longer used, and use memory pool technology. Thread optimization: identify tasks that can be parallelized and optimize the thread synchronization mechanism. Database optimization: Create indexes to speed up data retrieval, optimize query statements, and use cache or NoSQL databases to improve performance.

How to use the Redis cache solution to efficiently realize the requirements of product ranking list? How to use the Redis cache solution to efficiently realize the requirements of product ranking list? Apr 19, 2025 pm 11:36 PM

How does the Redis caching solution realize the requirements of product ranking list? During the development process, we often need to deal with the requirements of rankings, such as displaying a...

Best practices for building high-performance blockchain applications using Golang Best practices for building high-performance blockchain applications using Golang May 09, 2024 pm 12:33 PM

Best practices for building high-performance blockchain applications with GoLang: Concurrency: Use goroutines and channels for concurrent task processing to avoid blocking. Memory management: Use object pools and caches to reduce garbage collection overhead, and choose efficient data structures such as slicing. Data structure selection: Select appropriate data structures, such as hash tables and B-trees, according to application requirements to optimize data access patterns. Performance Analysis and Optimization: Use performance analysis tools to identify bottlenecks, optimize algorithms and data structures, and fine-tune performance through benchmarking.

How browser developer tools are used to view Bootstrap results How browser developer tools are used to view Bootstrap results Apr 07, 2025 am 09:57 AM

Developer tools help you understand the rendering results of Bootstrap pages, including powerful features: the Elements panel provides HTML structure, real-time code modifications, and class name query. The Styles panel displays applied style rules, including priority and override relationships. The "Network" panel records network requests, analyzing performance bottlenecks and referenced versions.

In back-end development, how to distinguish the responsibilities of the service layer and the dao layer? In back-end development, how to distinguish the responsibilities of the service layer and the dao layer? Apr 19, 2025 pm 01:51 PM

Discussing the hierarchical architecture in back-end development. In back-end development, hierarchical architecture is a common design pattern, usually including controller, service and dao three layers...

PHP enterprise-level application architecture and design practical experience sharing PHP enterprise-level application architecture and design practical experience sharing May 08, 2024 pm 04:12 PM

In enterprise-level PHP applications, domain-driven design (DDD), service layer architecture, microservice architecture and event-driven architecture are common architectural methods. DDD emphasizes the modeling of the business domain, the service layer architecture separates business logic and the presentation layer/data access layer, the microservice architecture decomposes the application into independent services, and EDA uses event messaging to trigger actions. Practical cases show how to apply these architectures in e-commerce websites and ERP systems.

How to view the CSS style of Bootstrap How to view the CSS style of Bootstrap Apr 07, 2025 am 10:24 AM

How to view Bootstrap CSS: Using Browser Developer Tools (F12). Find the "Elements" or "Inspector" tab and find the Bootstrap component. View the CSS styles that the component applies in the Styles panel. Developer tools can be used to filter styles or debug code to gain insight into how it works. Proficient in developer tools and avoid detours.

See all articles