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
module.exports={ add:(value1,value2) => return value1+value2 }When I wrote it like this, I got an error, but I don't know why.I turned off the return, but I don't know why it shouldn't be returne...
//./hoge.jsclass HOGE {}class FUGA {}classPIYO{}↑Create a file like this//./fuga.jsimport* from './hoge';// ↑↓ Either way is possibleimport {HOGE, FUGA, PIYO} from 'hoge';↑ I would like to be able to ...
readystatechange is an event, so I think I can register using addEventListener, but I think most Ajax samples use the method of replacing it with readystatechange.Is there any reason to avoid it?Becau...
I am writing the code while referring to the following site.https://codesandbox.io/s/vigilant-lehmann-82dzz?file=/src/dashboardView.js:1404-1406https://stackoverflow.com/questions/43978473/recharts-no...
Both those who hit and those who receive the API use Ravel as the framework, and they use guzzle to hit the external API.At that time, a tokenMissMatchException error appears because TokenCheck is tur...
I would like to implement it in JavaScript so that when I select two stations, information such as fares is calculated and displayed.The fare is linked to the distance between the two stations.In the ...
I want to create dragable elements using javascript (jQuery, etc.), but I don't know how to do it at all.Using the jQuery UI, it is easy to create dragable elements, but what should I do if I want to:...
I see the following way of writing the Arrow function, but I don't know what it means.Could you tell me the meaning of this Arrow function?.then(server=>{ console.log(server, server); return Promis...
I'm usually used to Ruby, so when I use JavaScript to manipulate arrays, hashes, strings, etc., it's troublesome to look for or implement Ruby's method in JavaScript.So please let me know if there is ...
Thank you for your help.I would like to add a tab sample function to the Notepad sample.<ons-tabbar> <ons-tabicon=home label=Home page=StopWatch.html active=true>/ons-tab> <ons-tabic...
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