search
HomeWeb Front-endHTML TutorialDOM notes (2): Node interface_html/css_WEB-ITnose

All nodes are represented using the Node interface. You can use many methods to obtain nodes, such as document.getElementsByTagName(), document.getElementsByName(), etc., which all return a NodeList object, and then obtain the node.

The corresponding attributes and amplification of nodes are defined in the Node interface:

1. Common attribute list of Node interface

属性名 数据类型 说明
nodeName DOMString 返回节点名
nodeValue DOMString 返回节点值
nodeType int 返回节点类型(见后文)
parentNode Node 返回当前节点的父节点
childNodes NodeList 返回当前节点的所有子节点
firstChild Node 返回当前节点的第一个子节点
lastChild Node 返回当前节点的最后一个子节点
previousSibling Node 返回当前节点的紧邻的前一个兄弟节点
nextSibling Node 返回当前节点的紧邻的后一个兄弟节点
attributes NamedNodeMap 返回当前节点的所有属性
ownerDocument Document 返回当前节点对应的Document对象
namespaceURI DOMString 返回当前节点所属命名空间的URI
prefix DOMString 返回当前节点所属命名空间的前缀
localName DOMString 返回当前节点限定名的本地部分

2. List of common methods of Node interface

方法名 数据类型 说明
appendChild Node 在末尾添加一个子节点
cloneNode Node 克隆一个子节点
hasAttributes Boolean 判断该节点是否有属性
hasChildNodes Boolean 判断该节点是否有子节点
insertBefore Node 在指定节点插入一个节点
isSupported Boolean 判断节点特定是否被支持
normalize Void 规格化节点
removeChild Node 删除一个子节点
replaceChild Node 替换一个子节点

3. Node type

In In a DOM document, each node belongs to a type. You can use the Node.nodeType property to obtain the node type. The DOM specification specifies 12 node types, which can be represented by constants defined by the Node interface or by numbers.

节点类型常量 数值表示 说明
ELEMENT_NODE 1 元素节点
ATTRIBUTE_NODE 2 属性节点
TEXT_NODE 3 文本节点
CDATA_SECTION_NODE 4 CDATA节点
ENTITY_REFERENCE_NODE 5 实体引用节点
ENTITY_NODE 6 实体节点
PROCESSING_INSTRUCTION_NODE 7 处理指令节点
COMMENT_NODE 8 注释节点
DOCUMENT_NODE 9 文档节点
DOCUMENT_TYPE_NODE 10 文档类型节点
DOCUMENT_FRAGMENT_NODE 11 文档片段节点
NOTATION_NODE 12 符号节点

PS: IE does not support constant representation, it is best to use numbers. The six most commonly used Node types: 1,2,3,8,9,11

Statement
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
The Future of HTML, CSS, and JavaScript: Web Development TrendsThe Future of HTML, CSS, and JavaScript: Web Development TrendsApr 19, 2025 am 12:02 AM

The future trends of HTML are semantics and web components, the future trends of CSS are CSS-in-JS and CSSHoudini, and the future trends of JavaScript are WebAssembly and Serverless. 1. HTML semantics improve accessibility and SEO effects, and Web components improve development efficiency, but attention should be paid to browser compatibility. 2. CSS-in-JS enhances style management flexibility but may increase file size. CSSHoudini allows direct operation of CSS rendering. 3.WebAssembly optimizes browser application performance but has a steep learning curve, and Serverless simplifies development but requires optimization of cold start problems.

HTML: The Structure, CSS: The Style, JavaScript: The BehaviorHTML: The Structure, CSS: The Style, JavaScript: The BehaviorApr 18, 2025 am 12:09 AM

The roles of HTML, CSS and JavaScript in web development are: 1. HTML defines the web page structure, 2. CSS controls the web page style, and 3. JavaScript adds dynamic behavior. Together, they build the framework, aesthetics and interactivity of modern websites.

The Future of HTML: Evolution and Trends in Web DesignThe Future of HTML: Evolution and Trends in Web DesignApr 17, 2025 am 12:12 AM

The future of HTML is full of infinite possibilities. 1) New features and standards will include more semantic tags and the popularity of WebComponents. 2) The web design trend will continue to develop towards responsive and accessible design. 3) Performance optimization will improve the user experience through responsive image loading and lazy loading technologies.

HTML vs. CSS vs. JavaScript: A Comparative OverviewHTML vs. CSS vs. JavaScript: A Comparative OverviewApr 16, 2025 am 12:04 AM

The roles of HTML, CSS and JavaScript in web development are: HTML is responsible for content structure, CSS is responsible for style, and JavaScript is responsible for dynamic behavior. 1. HTML defines the web page structure and content through tags to ensure semantics. 2. CSS controls the web page style through selectors and attributes to make it beautiful and easy to read. 3. JavaScript controls web page behavior through scripts to achieve dynamic and interactive functions.

HTML: Is It a Programming Language or Something Else?HTML: Is It a Programming Language or Something Else?Apr 15, 2025 am 12:13 AM

HTMLisnotaprogramminglanguage;itisamarkuplanguage.1)HTMLstructuresandformatswebcontentusingtags.2)ItworkswithCSSforstylingandJavaScriptforinteractivity,enhancingwebdevelopment.

HTML: Building the Structure of Web PagesHTML: Building the Structure of Web PagesApr 14, 2025 am 12:14 AM

HTML is the cornerstone of building web page structure. 1. HTML defines the content structure and semantics, and uses, etc. tags. 2. Provide semantic markers, such as, etc., to improve SEO effect. 3. To realize user interaction through tags, pay attention to form verification. 4. Use advanced elements such as, combined with JavaScript to achieve dynamic effects. 5. Common errors include unclosed labels and unquoted attribute values, and verification tools are required. 6. Optimization strategies include reducing HTTP requests, compressing HTML, using semantic tags, etc.

From Text to Websites: The Power of HTMLFrom Text to Websites: The Power of HTMLApr 13, 2025 am 12:07 AM

HTML is a language used to build web pages, defining web page structure and content through tags and attributes. 1) HTML organizes document structure through tags, such as,. 2) The browser parses HTML to build the DOM and renders the web page. 3) New features of HTML5, such as, enhance multimedia functions. 4) Common errors include unclosed labels and unquoted attribute values. 5) Optimization suggestions include using semantic tags and reducing file size.

Understanding HTML, CSS, and JavaScript: A Beginner's GuideUnderstanding HTML, CSS, and JavaScript: A Beginner's GuideApr 12, 2025 am 12:02 AM

WebdevelopmentreliesonHTML,CSS,andJavaScript:1)HTMLstructurescontent,2)CSSstylesit,and3)JavaScriptaddsinteractivity,formingthebasisofmodernwebexperiences.

See all articles

Hot AI Tools

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.

Undress AI Tool

Undress AI Tool

Undress images for free

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

SublimeText3 Linux new version

SublimeText3 Linux new version

SublimeText3 Linux latest version

Dreamweaver Mac version

Dreamweaver Mac version

Visual web development tools

ZendStudio 13.5.1 Mac

ZendStudio 13.5.1 Mac

Powerful PHP integrated development environment

SecLists

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.

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)