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
<input type=file name=upload_img[] id=upload_img onChange=load_image() required=required accept=image/x-png, image/jpeg multiple= /><img id = img_File1/><input type=file style= id=File1...
JavaScript Same-Origin PolicyI'd like to know how to avoidHere's the situation.I'm developing an e-learning siteSite domain is AThe domain where the actual flash files are located is B It plays well u...
Hello! I'd like to ask you about the iframe cross domainCurrently, iframe imports the authentication web in the external domain.Once you complete your authentication, you will be redirected to an empt...
The ability to change the size or shape of a blog when you mouse over a list, post, or imageIs it J-Query? Is it JavaScript?Where can I learn if I'm right?
Especially when printing errors, I write console.log or console.error.I learned the program on my own, so I wrote it confusedly without knowing the two meaningsThere seems to be a strange difference, ...
Hello, I am a student who is currently doing a semi-project with Spring.Currently, I saved the ppt file as bolb type and the video path as varcher2 type in db. I have to take these out and upload ppts...
I made a websiteThere is a chat function. I want to have a push notification on my PC when I get a message from the other person. (Like Kakao Talk)You want to use PHP or Javascript for languages.Pleas...
Using Bootstrap's popover . But I can only see popover when I click it, but I want to float it right away if I raise the mouse (hover.I think the document says it's possible with hover, but I don't kn...
function fn_edit_username(method, path) { method = method || post; var form = document.createElement(form); form.setAttribute(method, method); form.setAttribute(action, path); swal({ title: An in...
I have a question because there is a confusion about the understanding of the hashtag itself and how to implement it.When viewed on various webs, there is a function that uses hashtags to attach to ar...
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