Use jQuery and HTML code snippets to dynamically adjust the text size on the web page when the user clicks the "Increase Text" or "Reduce Text" button.
jQuery code:
$(document).ready(function(){ const targetSections = ['span', '.section2']; // 目標(biāo)元素選擇器數(shù)組 const selector = targetSections.join(','); // 將選擇器數(shù)組連接成字符串 // 獲取初始字體大小 const originalFontSize = $(selector).css('font-size'); // 重置字體大小 $(".resetFont").click(function(){ $(selector).css('font-size', originalFontSize); }); // 增大字體大小 $(".increaseFont").click(function(){ let currentFontSize = parseFloat($(selector).css('font-size'), 10); let newFontSize = currentFontSize * 1.2; $(selector).css('font-size', newFontSize + 'px'); // 添加單位px return false; }); // 減小字體大小 $(".decreaseFont").click(function(){ let currentFontSize = parseFloat($(selector).css('font-size'), 10); let newFontSize = currentFontSize * 0.8; $(selector).css('font-size', newFontSize + 'px'); // 添加單位px return false; }); });
HTML Code:
<button class="increaseFont">+</button> <button class="decreaseFont">-</button> <button class="resetFont">=</button> <p>此段落字體大小可調(diào)。</p> <div class="section2">此部分字體大小也可調(diào)!</div> <p>此段落不受影響。</p>
View online demonstration
FAQs on dynamically resizing text with jQuery:
Here are some answers to some frequently asked questions about dynamically resizing text using jQuery:
-
How to change font size dynamically using jQuery? Use
.css()
method. For example:$("p").css("font-size", "20px");
This will set the font size of all paragraph elements to 20px. -
How to use jQuery to increase or decrease font size? Get the current font size, then add or subtract the value. For example:
let size = parseInt($("p").css("font-size")); size = 2; $("p").css("font-size", size "px");
This will increase the font size of all paragraph elements by 2px. -
How to make the font size change with the window size when the window is resized? Use
.resize()
method. For example:$(window).resize(function() { let size = $(window).width() / 30; $("p").css("font-size", size "px"); });
This will adjust the font size of all paragraph elements according to the window width. -
Is it possible to use jQuery to animate changes in font size? You can use the
.animate()
method. For example:$("p").animate({ fontSize: "20px" }, 1500);
This will gradually change the font size of all paragraph elements to 20px in 1.5 seconds. -
How to change only the font size of a specific element? Use a specific selector. For example:
$("p.myClass").css("font-size", "20px");
This will set the font size of all paragraph elements with class "myClass" to 20px. -
How to reset the font size to its original value using jQuery? Set the font size to
""
(empty string). For example:$("p").css("font-size", "");
-
How to change the font size based on user input? Use the
.val()
method to get user input, and then use the.css()
method to set the font size. -
How to use jQuery to change its font size when clicking an element? Use
.click()
method. -
How to use jQuery to change its font size when the mouse is hovering over an element? Use
.hover()
method. -
How to change the font size of all elements of a specific type using jQuery? Use the type selector. For example:
$("p").css("font-size", "20px");
This will change the font size of all paragraph elements.
Code has been improved, adding processing of font size units to avoid potential errors. In addition, the code is clearer and the FAQ is explained in more detail.
The above is the detailed content of jQuery Resizing Text Dynamically. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undress AI Tool
Undress images for free

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

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

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

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.

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

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.

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

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

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

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.

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