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
I want to check if the device is IOS and do different processing only if it is IOS. But how do I check if it's IOS?
var obj1 = { food: 'pizza', car: 'ford' }var obj2 = { animal: 'dog' }obj1.merge(obj2);//obj1 now has three properties: food, car, and animalI'd like to dynamically merge the two object properties as i...
I want to use jQuery to make DIV come out in the center of the screen, what should I do?
It is being developed as Django. When you click the button on the left, you want to print an application page on the right id=right.Script source now <script>function button1(){document.getEleme...
I don't want to change it to another one because the shortcut key is alt in the web application.
Hello, everyone Node.js wants to use socket.io to implement real-time push services on the web.There is a push server and a web server separately, but I want to push to the push server when I write a ...
In php, $array = array();$array[] = value1;$array[] = value2;$array[] = value3;How do I do this in JavaScript?
this is a test -> This is a testthe Eiffel Tower -> The Eiffel Tower/index.html -> /index.htmlI want to capitalize the first letter of the string in JavaScript like this, but I don't know how...
I'd like to convert float to String in JavaScript. How can I see only the second decimal place? For example, if I have 0.3445434, I want to save up to 0.34
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