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
http://js2.coffee/This tool is a JavaScript<=>CoffeScript cross-conversion tool.Is there anything that can be converted to JavaScript<=>ES6 in the same way?The goal is to efficiently repla...
Is it possible to redirect further from the page where JavaScript determines the browser UA?I'd like to sort the pages separately between non-compatible mobile phones and compatible mobile phones.1. J...
In the block breaking game using tmlib.js, the collision is set as follows:this.setBoundingType(circle); on the ballthis.setBoundingType(rect); on the paddleThe collision determination determines that...
There is a combo box called payment date on the screen, and the value is set to the value obtained from DB processing.After setting it up, the initial value is to display the value processed by the se...
Next time I click BBB in HTML, I'd like to bring up a menu that I want to expand below.AAA BBB CCC DDD Menu 1 (←Expanded Menu) Menu 2 (←Deployed Menu) However, if you expand it normally, The cont...
I have a question about python.I tried to get the source of the page in urllib.request.urlopen().read(), but I couldn't get it as I wanted.Details are as follows:The following program retrieved the sp...
There is an error in client-ios.js, but I don't know where to fix it.It seems to be an error with the symbol <, but I don't use it anywhere, so it's refreshing.If you are familiar with javascript, ...
I want to load the HTML that was issued and display it beautifully on the Modal of Bootstrap, but the Modal dialog of Bootstrap 3 doesn't work.What's wrong? Thank you for your cooperation!!<html>...
Using Node.js, we returned the gzip compressed html file as a response in the following form: consthoge='huga';res.setHeader('Content-Disposition', 'attachment; filename=test.html.gz');res.setHeader('...
Some packages use require functions that are incompatible with standard require.js and commonjs, so webpack may not work properly.I recognize Raphall.js and getsentry/raven-js.In order to solve this p...
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