What is the difference between attr and prop in jQuery
This article will share about the difference between attr() and prop() in jQuery for setting attributes and getting attributes. It has certain reference value and I hope it will be helpful to everyone.
We often get used to it. Use the attr() method to get the attribute value. For example, if you want to get the alt attribute of an image, we can use attr to get it directly. However, in some elements, you cannot directly get the standard attribute (true/false), so we later got the prop attribute. , its return values are all standard attributes, so which attributes use attr and which use prop? We will introduce the
attr attribute in detail in the following article
attr(name|properties|key,value|fn)
is used Sets or returns the attribute value of the selected element.
When used to return attribute values, only the value of the first matching element is returned.
When used to set attribute values, one or more attribute/value pairs are set for the set of matching elements
Example: Set the src attribute and length and width for all images
<body>
<img>
<script src="jquery/jquery-1.12.4.js"></script>
<script>
$(function(){
$("img").attr({width:"100px",height:"100px","src":"images/1.jpg"});
})//为img添加多个属性值
</script>
</body>
prop attribute
Get the attribute value of the first element in the matched element set
Selected is true, unselected is false
When selecting a hobby, select all, other single selections, when all four are selected, all hobbies are selected
<script src="jquery/jquery-1.12.4.js"></script>
<script>
$(function () {
$("#j_cbAll").click(function () {
//修改下面的哪些checkbox
$("#j_tb input").prop("checked", $(this).prop("checked"));
});
$("#j_tb input").click(function () {
if($("#j_tb input:checked").length == $("#j_tb input").length){
$("#j_cbAll").prop("checked", true)
}else {
$("#j_cbAll").prop("checked", false)
}
});
});
</script>When single selection
When choosing a hobby
The difference between attr and prop:
（ 1) For example, in checked, selected, disabled, etc., the prop method returns a Boolean value, while attr returns a defined string
(2) The prop() attribute is used to set or get the specified DOM Elements are also object attributes in JavaScript, so we can set arrays or objects, and attr acts on document nodes, so it can only be strings
(3) The use of prop() attributes is more compatible than attr
So when the attribute only needs to add the attribute name, you can use attr, and when you only need to return true/false, you can use prop.
Summary: The above is the entire content of this article. I hope that through this article, everyone can understand the difference between attr and prop
The above is the detailed content of What is the difference between attr and prop in jQuery. 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
AI Hentai Generator
Generate AI Hentai for free.
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
Replace String Characters in JavaScript
Mar 11, 2025 am 12:07 AM
Detailed explanation of JavaScript string replacement method and FAQ This article will explore two ways to replace string characters in JavaScript: internal JavaScript code and internal HTML for web pages. Replace string inside JavaScript code The most direct way is to use the replace() method: str = str.replace("find","replace"); This method replaces only the first match. To replace all matches, use a regular expression and add the global flag g: str = str.replace(/fi
jQuery Check if Date is Valid
Mar 01, 2025 am 08:51 AM
Simple JavaScript functions are used to check if a date is valid. function isValidDate(s) { var bits = s.split('/'); var d = new Date(bits[2] '/' bits[1] '/' bits[0]); return !!(d && (d.getMonth() 1) == bits[1] && d.getDate() == Number(bits[0])); } //test var
jQuery get element padding/margin
Mar 01, 2025 am 08:53 AM
This article discusses how to use jQuery to obtain and set the inner margin and margin values of DOM elements, especially the specific locations of the outer margin and inner margins of the element. While it is possible to set the inner and outer margins of an element using CSS, getting accurate values can be tricky. // set up $("div.header").css("margin","10px"); $("div.header").css("padding","10px"); You might think this code is
10 jQuery Accordions Tabs
Mar 01, 2025 am 01:34 AM
This article explores ten exceptional jQuery tabs and accordions. The key difference between tabs and accordions lies in how their content panels are displayed and hidden. Let's delve into these ten examples. Related articles: 10 jQuery Tab Plugins
10 Worth Checking Out jQuery Plugins
Mar 01, 2025 am 01:29 AM
Discover ten exceptional jQuery plugins to elevate your website's dynamism and visual appeal! This curated collection offers diverse functionalities, from image animation to interactive galleries. Let's explore these powerful tools: Related Posts: 1
HTTP Debugging with Node and http-console
Mar 01, 2025 am 01:37 AM
http-console is a Node module that gives you a command-line interface for executing HTTP commands. It’s great for debugging and seeing exactly what is going on with your HTTP requests, regardless of whether they’re made against a web server, web serv
Custom Google Search API Setup Tutorial
Mar 04, 2025 am 01:06 AM
This tutorial shows you how to integrate a custom Google Search API into your blog or website, offering a more refined search experience than standard WordPress theme search functions. It's surprisingly easy! You'll be able to restrict searches to y
jquery add scrollbar to div
Mar 01, 2025 am 01:30 AM
The following jQuery code snippet can be used to add scrollbars when the div content exceeds the container element area. (No demonstration, please copy it directly to Firebug) //D = document //W = window //$ = jQuery var contentArea = $(this), wintop = contentArea.scrollTop(), docheight = $(D).height(), winheight = $(W).height(), divheight = $('#c
