The difference between the ID and Name attributes of HTML elements
I suddenly got interested today and wanted to delve into the specific differences between these two attributes
The most classical answer: ID is like a person ID number, and Name is like his name. ID is obviously unique, but Name can be repeated. Obviously, the answer to ID and Name is too general. Of course, that explanation is completely correct for ID, which is the Identity of the HTML element on the client side. Name is actually much more complicated, because Name has many uses, so it cannot be completely replaced by ID, thus canceling it. The specific uses are:
Use 1: As a server-side indicator of HTML elements that can interact with the server, such as input, select, textarea, and button. We can get the value submitted by the element through Request.Params based on its Name on the server side.
Use 2: HTML element Input type='radio' grouping, we know that the radio button control is in the same grouping class, the check operation is mutex, only one radio can be selected at the same time, this grouping is based on the same Name attribute to achieve.
Purpose 3: Establish an anchor point in the page. We know that link is to obtain a page hyperlink. If you do not use the href attribute and use Name instead, For example: , we get a page anchor.
Purpose 4: Identity as an object, such as Applet, Object, Embed and other elements. For example, in an Applet object instance, we will use its Name to refer to the object.
Purpose 5: When linking IMG elements and MAP elements, if you want to define the hotspot area of IMG, you need to use its attribute usemap, so usemap="#name" (Name of the associated MAP element) ).
Use 6: Attributes of certain specific elements, such as attribute, meta and param. For example, define parameters for Object or in Meta.
Obviously these uses cannot be simply replaced by ID, so the difference between ID and Name of HTML elements is not the difference between ID number and name. They have different functions. .
<input name= "xx "> 会提交数据 <input id= "xx "> 不会提交数据 <input id= "xx " name= "yy "> <label for= "xx "> Label </label> 这里的for属性必须是指向一个id,否则没效果 <input name= "xx " type= "radio " value= "1 "> <input name= "xx " type= "radio " value= "2 "> <input name= "xx " type= "radio " value= "3 "> 这里必须name相同才能成为一组单选按钮,而id则没有这个功能。 <input name= "xx "> 对应脚本document.getElementsByName( "xx ")[0] <input id= "xx "> 对应脚本document.getElementByIdx_x( "xx ")
The above is the specific difference between these two attributes.
【Related Recommendations】
1. Special Recommendation:"php Programmer Toolbox" V0.1 version Download
2. Free html online video tutorial
3. php.cn original html5 video tutorial
The above is the detailed content of The specific difference between HTML element ID and Name attributes. For more information, please follow other related articles on the PHP Chinese website!

A consistent HTML encoding style is important because it improves the readability, maintainability and efficiency of the code. 1) Use lowercase tags and attributes, 2) Keep consistent indentation, 3) Select and stick to single or double quotes, 4) Avoid mixing different styles in projects, 5) Use automation tools such as Prettier or ESLint to ensure consistency in styles.

Solution to implement multi-project carousel in Bootstrap4 Implementing multi-project carousel in Bootstrap4 is not an easy task. Although Bootstrap...

How to achieve the effect of mouse scrolling event penetration? When we browse the web, we often encounter some special interaction designs. For example, on deepseek official website, �...

The default playback control style of HTML video cannot be modified directly through CSS. 1. Create custom controls using JavaScript. 2. Beautify these controls through CSS. 3. Consider compatibility, user experience and performance, using libraries such as Video.js or Plyr can simplify the process.

Potential problems with using native select on mobile phones When developing mobile applications, we often encounter the need for selecting boxes. Normally, developers...

What are the disadvantages of using native select on your phone? When developing applications on mobile devices, it is very important to choose the right UI components. Many developers...

Use Three.js and Octree to optimize collision handling of third-person roaming in the room. Use Octree in Three.js to implement third-person roaming in the room and add collisions...

Issues with native select on mobile phones When developing applications on mobile devices, we often encounter scenarios where users need to make choices. Although native sel...


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

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

Zend Studio 13.0.1
Powerful PHP integrated development environment
