JavaScript (/ˈdʒɑːvəskrɪpt/), often abbreviated JS, is a programming language that is one of the core technologies of the World Wide Web, alongside HTML and CSS. As of 2022, 98% of websites use JavaScript on the client side for web page behavior, often incorporating third-party libraries. All major web browsers have a dedicated JavaScript engine to execute the code on users' devices.
JavaScript is a high-level, often just-in-time compiled language that conforms to the ECMAScript standard. It has dynamic typing, prototype-based object-orientation, and first-class functions. It is multi-paradigm, supporting event-driven, functional, and imperative programming styles. It has application programming interfaces (APIs) for working with text, dates, regular expressions, standard data structures, and the Document Object Model (DOM).
The ECMAScript standard does not include any input/output (I/O), such as networking, storage, or graphics facilities. In practice, the web browser or other runtime system provides JavaScript APIs for I/O.
JavaScript engines were originally used only in web browsers, but are now core components of some servers and a variety of applications. Two of the most popular runtime systems for this usage are Node.js and Deno.
Although Java and JavaScript are similar in name, syntax, and respective standard libraries, the two languages are distinct and differ greatly in design.
Reference: WIKIPEDIA
1427 questions
The screen displays the following target1 target2 target3 target4Here's how it works.<div> target1 <span>target2</span> <span>target3</span> target4</div>When you c...
<script language=JavaScript> myTickets = new Array(); startPosArr = new Array(); endPosArr = new Array(); selItem; eee2 = 0; function setMyTicketList(){ alert(^^ : + eee2);}The following error...
var num = 11;(num > 100) && num++;document.writeln (num: +num+<br/>); //value num: 11(num < 100) || num++;document.writeln (num: +num+<br/>);//value num: 11(num < 100) &am...
I heard that <script type=> can specify the type and javascript is specified as the default value in lecture 1-23.As far as I know, I heard that HTML css javascript can handle only three things,...
var result = ;var reader = new FileReader();reader.onload = function(event) { result = CryptoJS.SHA256(event.target.result).toString();};reader.readAsBinaryString(tempFile);The hash value of a file in...
1. Save directly to directory and declare<script src=/dir/jquery-1.10.2.js></script>2. Declaring http path calls<script src=http://code.jquery.com/jquery-1.10.2.js></script>Bef...
Hello, I am a student who has just studied the web in high school.I'm working on a project with my friends for this project, and I'm doing a 'shopping mall' with the development.The main development l...
Hi, I'm trying to delete two unicodes in the text with javascript: &zwj and &emsp, but it doesn't work as I thought.<div class=item data-value=0399>‍ Fruits </div>...
Usually, a floating point calculation error occurs in a programming language.var x = 0.2 + 0.1; // 0.3console.log(x) // 0.30000000000000004var y = 0.1 * 0.2; // 0.02 console.log(y) // 0.02000000000000...
Hello, I'm a total beginner who has been learning JavaScript for 2 weeksThe academy gave me the assignment. I tried it after thinking about it for 3 days, but I can't do it because I made a wrong func...
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