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
Assume you use the asset pipeline, app/assets/images/1.jpgIf you placed an image file on the , you do not know how to specify the path when using Javascript.For example, in a simple jQuery, in a js fi...
I have specified width 1024, height 768 in GameApp, but when I actually draw, I can only draw up to width 800.What are the possible causes of this?phina.define('MainScene', { superClass: 'DisplayScene...
Use the occasional drag and drop in CMS to move text boxes, etc. How does a function that allows you to edit as you see it work?
Create a menu where you can select the font-size of all sites in the header part of the site.[S][M] Separate by [L] and press each to change the font-size of the site.And keep the font-size selected w...
I'd like to implement it on Swift, but any language is fine as long as logic is applied. The value (numeric) of a variable changes dynamically, but I'd like to branch the process by whether the value ...
https://picturepan2.github.io/spectre/index.html#installationI'd like to use this CSS framework called spectre.css, but I've rarely used yarn (also the original npm).Running $yarn add spectre.css conf...
I want to display the table with jqGrid, but it doesn't look good at all.What is the cause?I have downloaded and used the following for jQueryUI and jqGrid.·jQueryUI(http://jqueryui.com/download/)·jqG...
Loaded HTML pages with automatically generated elements.I would like to identify the JS function that is generating that element and delete it, but is it possible to use Firefox's development tool?Fir...
Hello.I want to deal with JavaScript var hoisting issue I'm going to write the variable declaration in var at the beginning as much as possible.Also, we often comment out variables during development,...
This is my third week in JavaScript history.Since I've been dealing with Python for a long time, there were only two scopes of variables: global or not, but recently I realized that JavaScript has oth...
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