In JavaScript, the attributes attribute can obtain and return the attribute collection of the specified element node, that is, the NamedNodeMap object; the syntax is "element node.attributes".
The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.
The attributes attribute returns the attribute collection of the specified node, that is, the NamedNodeMap object.
Tip: You can use the length property to determine the number of properties, and then you can iterate through all property nodes and extract the information you need.
Syntax: node.attributes
Return value: NamedNodeMap object, representing a collection of attributes.
<!DOCTYPE html>
<html>
<body>
<p>点击按钮来查看 button 元素拥有多少属性。</p>
<button id="myBtn" onclick="myFunction()">试一下</button>
<p id="demo"></p>
<script>
function myFunction() {
var x = document.getElementById("myBtn").attributes.length;
document.getElementById("demo").innerHTML = x;
}
</script>
</body>
</html>Let’s guess what the result is? The result should be 2 (the id and onclick attributes of the button element). Take a look at the renderings:
[Recommended learning: javascript advanced tutorial]
The above is the detailed content of What does the javascript attributes attribute do?. For more information, please follow other related articles on the PHP Chinese website!
CSS: Can I use multiple IDs in the same DOM?May 14, 2025 am 12:20 AMNo,youshouldn'tusemultipleIDsinthesameDOM.1)IDsmustbeuniqueperHTMLspecification,andusingduplicatescancauseinconsistentbrowserbehavior.2)Useclassesforstylingmultipleelements,attributeselectorsfortargetingbyattributes,anddescendantselectorsforstructure
The Aims of HTML5: Creating a More Powerful and Accessible WebMay 14, 2025 am 12:18 AMHTML5aimstoenhancewebcapabilities,makingitmoredynamic,interactive,andaccessible.1)Itsupportsmultimediaelementslikeand,eliminatingtheneedforplugins.2)Semanticelementsimproveaccessibilityandcodereadability.3)Featureslikeenablepowerful,responsivewebappl
Significant Goals of HTML5: Enhancing Web Development and User ExperienceMay 14, 2025 am 12:18 AMHTML5aimstoenhancewebdevelopmentanduserexperiencethroughsemanticstructure,multimediaintegration,andperformanceimprovements.1)Semanticelementslike,,,andimprovereadabilityandaccessibility.2)andtagsallowseamlessmultimediaembeddingwithoutplugins.3)Featur
HTML5: Is it secure?May 14, 2025 am 12:15 AMHTML5isnotinherentlyinsecure,butitsfeaturescanleadtosecurityrisksifmisusedorimproperlyimplemented.1)Usethesandboxattributeiniframestocontrolembeddedcontentandpreventvulnerabilitieslikeclickjacking.2)AvoidstoringsensitivedatainWebStorageduetoitsaccess
HTML5 goals in comparison with older HTML versionsMay 14, 2025 am 12:14 AMHTML5aimedtoenhancewebdevelopmentbyintroducingsemanticelements,nativemultimediasupport,improvedformelements,andofflinecapabilities,contrastingwiththelimitationsofHTML4andXHTML.1)Itintroducedsemantictagslike,,,improvingstructureandSEO.2)Nativeaudioand
CSS: Is it bad to use ID selector?May 13, 2025 am 12:14 AMUsing ID selectors is not inherently bad in CSS, but should be used with caution. 1) ID selector is suitable for unique elements or JavaScript hooks. 2) For general styles, class selectors should be used as they are more flexible and maintainable. By balancing the use of ID and class, a more robust and efficient CSS architecture can be implemented.
HTML5: Goals in 2024May 13, 2025 am 12:13 AMHTML5'sgoalsin2024focusonrefinementandoptimization,notnewfeatures.1)Enhanceperformanceandefficiencythroughoptimizedrendering.2)Improveaccessibilitywithrefinedattributesandelements.3)Addresssecurityconcerns,particularlyXSS,withwiderCSPadoption.4)Ensur
What are the main areas where HTML5 tried to improve?May 13, 2025 am 12:12 AMHTML5aimedtoimprovewebdevelopmentinfourkeyareas:1)Multimediasupport,2)Semanticstructure,3)Formcapabilities,and4)Offlineandstorageoptions.1)HTML5introducedandelements,simplifyingmediaembeddingandenhancinguserexperience.2)Newsemanticelementslikeandimpr
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
SublimeText3 Linux new version
SublimeText3 Linux latest version
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.
ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment
DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software
Notepad++7.3.1
Easy-to-use and free code editor
