Web Front-endJS TutorialJavaScript intercepts a string of specified length and clicks to expand the entire code_javascript skills
The length of the article is often not so appropriate. If it is displayed at the original length, it may affect the layout or aesthetics of the web page. At this time, it is necessary to intercept certain strings according to the situation to adapt to the layout. However, when When you click a button, you can still expand all the content. Here is a detailed introduction to how to achieve this effect through an example. The code example is as follows:
<!DOCTYPE html>
<html>
<head>
<meta charset=" utf-8">
<meta name="author" content="http://www.softwhy.com/" />
<title>字符串截取展开效果</title>
<style type="text/css">
#thediv{
width:200px;
margin:0px auto;
}
</style>
<script type="text/javascript">
function cutStr(){
var odiv=document.getElementById("thediv");
var str=odiv.innerHTML;
var ospan=document.createElement("span");
var olink=document.createElement("a");
ospan.innerHTML=str.substring(0,20);
olink.innerHTML=str.length>20?"...":"";
olink.href="###";
olink.onclick=function(){
if(olink.innerHTML=="..."){
olink.innerHTML="收起";
ospan.innerHTML=str;
}
else{
olink.innerHTML="...";
ospan.innerHTML=str.substring(0,20);
}
}
odiv.innerHTML="";
odiv.appendChild(ospan);
odiv.appendChild(olink);
};
window.onload=function(){
cutStr();
}
</script>
<body>
<div id="thediv">脚本之家欢迎您，个人的力量再强也只是一只强壮的而已，如果有分享和胸怀和合作的精神，那么就有可能活得巨大进步。</div>
</body>
</html>
The above code implements our requirements, intercepts the specified string, and ends with "...". When this ending is clicked, all text content can be expanded. The following is an introduction to the implementation process of this effect.
1. Implementation principle:
Create a span element and a element, then use the substring() function to intercept the specified string and set it as the content of the span element, and then determine whether the length of the original string is greater than the specified length. If it is greater, then a The content in the element is set to "...". Then clear the original div, and then add the span element and a element to the div, thus realizing the interception function. Register a time processing function for the a element. Clicking this button will execute the event processing function. This function first determines what state it is in. If it is in the collapsed state, then the content in the a element will be set to "collapse" , and put all the original characters into span, thus realizing expansion. If it is in the expanded state, then the characters are intercepted and the content in the a element is modified. The principle is roughly the same, you can refer to related readings.
The above content is the JavaScript that this article introduces to you to intercept a string of specified length. Click to expand the entire code. I hope you like it.
JavaScript Comments: A Guide to Using // and /* */May 13, 2025 pm 03:49 PMJavaScriptusestwotypesofcomments:single-line(//)andmulti-line(//).1)Use//forquicknotesorsingle-lineexplanations.2)Use//forlongerexplanationsorcommentingoutblocksofcode.Commentsshouldexplainthe'why',notthe'what',andbeplacedabovetherelevantcodeforclari
Python vs. JavaScript: A Comparative Analysis for DevelopersMay 09, 2025 am 12:22 AMThe main difference between Python and JavaScript is the type system and application scenarios. 1. Python uses dynamic types, suitable for scientific computing and data analysis. 2. JavaScript adopts weak types and is widely used in front-end and full-stack development. The two have their own advantages in asynchronous programming and performance optimization, and should be decided according to project requirements when choosing.
Python vs. JavaScript: Choosing the Right Tool for the JobMay 08, 2025 am 12:10 AMWhether to choose Python or JavaScript depends on the project type: 1) Choose Python for data science and automation tasks; 2) Choose JavaScript for front-end and full-stack development. Python is favored for its powerful library in data processing and automation, while JavaScript is indispensable for its advantages in web interaction and full-stack development.
Python and JavaScript: Understanding the Strengths of EachMay 06, 2025 am 12:15 AMPython and JavaScript each have their own advantages, and the choice depends on project needs and personal preferences. 1. Python is easy to learn, with concise syntax, suitable for data science and back-end development, but has a slow execution speed. 2. JavaScript is everywhere in front-end development and has strong asynchronous programming capabilities. Node.js makes it suitable for full-stack development, but the syntax may be complex and error-prone.
JavaScript's Core: Is It Built on C or C ?May 05, 2025 am 12:07 AMJavaScriptisnotbuiltonCorC ;it'saninterpretedlanguagethatrunsonenginesoftenwritteninC .1)JavaScriptwasdesignedasalightweight,interpretedlanguageforwebbrowsers.2)EnginesevolvedfromsimpleinterpreterstoJITcompilers,typicallyinC ,improvingperformance.
JavaScript Applications: From Front-End to Back-EndMay 04, 2025 am 12:12 AMJavaScript can be used for front-end and back-end development. The front-end enhances the user experience through DOM operations, and the back-end handles server tasks through Node.js. 1. Front-end example: Change the content of the web page text. 2. Backend example: Create a Node.js server.
Python vs. JavaScript: Which Language Should You Learn?May 03, 2025 am 12:10 AMChoosing Python or JavaScript should be based on career development, learning curve and ecosystem: 1) Career development: Python is suitable for data science and back-end development, while JavaScript is suitable for front-end and full-stack development. 2) Learning curve: Python syntax is concise and suitable for beginners; JavaScript syntax is flexible. 3) Ecosystem: Python has rich scientific computing libraries, and JavaScript has a powerful front-end framework.
JavaScript Frameworks: Powering Modern Web DevelopmentMay 02, 2025 am 12:04 AMThe power of the JavaScript framework lies in simplifying development, improving user experience and application performance. When choosing a framework, consider: 1. Project size and complexity, 2. Team experience, 3. Ecosystem and community support.
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
PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool
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
SublimeText3 Chinese version
Chinese version, very easy to use
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.
Dreamweaver Mac version
Visual web development tools
