国产av日韩一区二区三区精品,成人性爱视频在线观看,国产,欧美,日韩,一区,www.成色av久久成人,2222eeee成人天堂

Table of Contents
Frequently Asked Questions (FAQs) about jQuery Element Current Focus
How can I determine which element currently has focus using jQuery?
Can I set focus on a specific element using jQuery?
How can I remove focus from an element using jQuery?
Can I trigger an event when an element gains focus?
Can I trigger an event when an element loses focus?
How can I check if an element has focus using jQuery?
Can I set focus on an element when the page loads?
Can I use jQuery to focus on form inputs?
How can I use jQuery to focus on the next input field when the enter key is pressed?
Can I use jQuery to focus on a link (anchor tag)?
Home Web Front-end JS Tutorial jQuery get element with current focus

jQuery get element with current focus

Mar 01, 2025 am 12:17 AM

jQuery get element with current focus

jQuery get element with current focus

jQuery code snippet to get element with current focus and perform AJAX auto save once it looses focus.
<span>//get active element of focus using js
</span><span>$(document.activeElement)</span>
<span>//change focus when tabbed across into new item
</span><span>$('.item :input').live('focus', function()
</span><span>{
</span>  <span>var thisItem = $(this).parents('.item');
</span>  <span>var thisId = thisItem.attr('id');
</span>  <span>$('.item').removeClass('item-selected'); //remove all focus
</span>  thisItem<span>.addClass('item-selected');  //add focus to current item
</span>
  <span>//save those items that have changed
</span>  $<span>.each($('.item-changed'), function(i<span>,v</span>)
</span>  <span>{
</span>      <span>var currItemId = $(this).attr('id');
</span>      <span>//exclude current item
</span>      <span>if (!_this.helpers.itemHasFocus(currItemId))
</span>      <span>{
</span>         <span>console.log('saving '+currItemId);
</span>         _this<span>.save.item(currItemId); /* AJAX auto save */
</span>         <span>$(this).removeClass('item-changed');
</span>      <span>}
</span>  <span>});
</span><span>});</span>

Frequently Asked Questions (FAQs) about jQuery Element Current Focus

How can I determine which element currently has focus using jQuery?

To determine which element currently has focus using jQuery, you can use the :focus selector. This selector allows you to select the HTML element that currently has focus on the webpage. Here’s a simple example:

$(document).ready(function(){
var focusedElement = $(':focus');
console.log(focusedElement);
});
In this code, :focus selects the element that currently has focus, and console.log(focusedElement); prints the focused element to the console.

Can I set focus on a specific element using jQuery?

Yes, you can set focus on a specific element using jQuery. The focus() method is used to set focus on a specific element. Here’s an example:

$("#myElement").focus();
In this code, #myElement is the id of the element you want to set focus on.

How can I remove focus from an element using jQuery?

To remove focus from an element, you can use the blur() method in jQuery. Here’s an example:

$("#myElement").blur();
In this code, #myElement is the id of the element you want to remove focus from.

Can I trigger an event when an element gains focus?

Yes, you can trigger an event when an element gains focus using the focus() method in jQuery. Here’s an example:

$("#myElement").focus(function(){
alert("Element has gained focus");
});
In this code, an alert is triggered when #myElement gains focus.

Can I trigger an event when an element loses focus?

Yes, you can trigger an event when an element loses focus using the blur() method in jQuery. Here’s an example:

$("#myElement").blur(function(){
alert("Element has lost focus");
});
In this code, an alert is triggered when #myElement loses focus.

How can I check if an element has focus using jQuery?

To check if an element has focus, you can use the is(":focus") method in jQuery. Here’s an example:

if($("#myElement").is(":focus")){
console.log("Element has focus");
} else {
console.log("Element does not have focus");
}
In this code, a message is printed to the console depending on whether #myElement has focus or not.

Can I set focus on an element when the page loads?

Yes, you can set focus on an element when the page loads using the focus() method inside the $(document).ready() function. Here’s an example:

$(document).ready(function(){
$("#myElement").focus();
});
In this code, #myElement gains focus when the page loads.

Can I use jQuery to focus on form inputs?

Yes, you can use jQuery to focus on form inputs. The focus() method can be used to set focus on form inputs. Here’s an example:

$("input").focus();
In this code, the first input element in the DOM gains focus.

How can I use jQuery to focus on the next input field when the enter key is pressed?

You can use the keypress() method in jQuery to detect when the enter key is pressed, and the next() method to focus on the next input field. Here’s an example:

$("input").keypress(function(e){
if(e.which == 13){
$(this).next().focus();
}
});
In this code, when the enter key is pressed in an input field, focus is set on the next input field.

Yes, you can use jQuery to focus on a link. The focus() method can be used to set focus on a link. Here’s an example:

$("a").focus();
In this code, the first link in the DOM gains focus.

The above is the detailed content of jQuery get element with current focus. 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)

Which Comment Symbols to Use in JavaScript: A Clear Explanation Which Comment Symbols to Use in JavaScript: A Clear Explanation Jun 12, 2025 am 10:27 AM

In JavaScript, choosing a single-line comment (//) or a multi-line comment (//) depends on the purpose and project requirements of the comment: 1. Use single-line comments for quick and inline interpretation; 2. Use multi-line comments for detailed documentation; 3. Maintain the consistency of the comment style; 4. Avoid over-annotation; 5. Ensure that the comments are updated synchronously with the code. Choosing the right annotation style can help improve the readability and maintainability of your code.

The Ultimate Guide to JavaScript Comments: Enhance Code Clarity The Ultimate Guide to JavaScript Comments: Enhance Code Clarity Jun 11, 2025 am 12:04 AM

Yes,JavaScriptcommentsarenecessaryandshouldbeusedeffectively.1)Theyguidedevelopersthroughcodelogicandintent,2)arevitalincomplexprojects,and3)shouldenhanceclaritywithoutclutteringthecode.

Java vs. JavaScript: Clearing Up the Confusion Java vs. JavaScript: Clearing Up the Confusion Jun 20, 2025 am 12:27 AM

Java and JavaScript are different programming languages, each suitable for different application scenarios. Java is used for large enterprise and mobile application development, while JavaScript is mainly used for web page development.

Javascript Comments: short explanation Javascript Comments: short explanation Jun 19, 2025 am 12:40 AM

JavaScriptcommentsareessentialformaintaining,reading,andguidingcodeexecution.1)Single-linecommentsareusedforquickexplanations.2)Multi-linecommentsexplaincomplexlogicorprovidedetaileddocumentation.3)Inlinecommentsclarifyspecificpartsofcode.Bestpractic

Mastering JavaScript Comments: A Comprehensive Guide Mastering JavaScript Comments: A Comprehensive Guide Jun 14, 2025 am 12:11 AM

CommentsarecrucialinJavaScriptformaintainingclarityandfosteringcollaboration.1)Theyhelpindebugging,onboarding,andunderstandingcodeevolution.2)Usesingle-linecommentsforquickexplanationsandmulti-linecommentsfordetaileddescriptions.3)Bestpracticesinclud

JavaScript Data Types: A Deep Dive JavaScript Data Types: A Deep Dive Jun 13, 2025 am 12:10 AM

JavaScripthasseveralprimitivedatatypes:Number,String,Boolean,Undefined,Null,Symbol,andBigInt,andnon-primitivetypeslikeObjectandArray.Understandingtheseiscrucialforwritingefficient,bug-freecode:1)Numberusesa64-bitformat,leadingtofloating-pointissuesli

JavaScript vs. Java: A Comprehensive Comparison for Developers JavaScript vs. Java: A Comprehensive Comparison for Developers Jun 20, 2025 am 12:21 AM

JavaScriptispreferredforwebdevelopment,whileJavaisbetterforlarge-scalebackendsystemsandAndroidapps.1)JavaScriptexcelsincreatinginteractivewebexperienceswithitsdynamicnatureandDOMmanipulation.2)Javaoffersstrongtypingandobject-orientedfeatures,idealfor

How to work with dates and times in js? How to work with dates and times in js? Jul 01, 2025 am 01:27 AM

The following points should be noted when processing dates and time in JavaScript: 1. There are many ways to create Date objects. It is recommended to use ISO format strings to ensure compatibility; 2. Get and set time information can be obtained and set methods, and note that the month starts from 0; 3. Manually formatting dates requires strings, and third-party libraries can also be used; 4. It is recommended to use libraries that support time zones, such as Luxon. Mastering these key points can effectively avoid common mistakes.

See all articles