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
Please tell me how to call function1 of file2 from file1.I wish I could only recall that function.
<script>alert(abc+1+2)alert(1+2+abc)</script>The first line is to add a number from the letter + number (when viewed as a whole)It's abc12. The second line is a number plus a number plus a...
Hello.I'm studying Python and JavaScript together. JavaScript uses used in Python and this self has the same meaning?
We are conducting a survey, and we need to collect whether or not you clicked on a specific button included in the document.I understand that Google event tracking can determine the total number of cl...
When you click on the element $gall, the slide show screen $zoom appears in the pictureI want to click on the $previewImg below to run the slide() function, but I want to cover the new variable i with...
In the case of Naver Web document, if you click View Source in Chrome, you can see the source layer as follows. Of course, I don't know the whole context, but I was able to see how it was organized ro...
I want to process several values in one, but it doesn't work well because I wrote in the case. What should I do?function daysInMonth( month ){ switch(month){ case 2: return 28; break; case 4,6,9,11: r...
We are creating a website with a basic gallery structure that gathers thumbnail images and makes the image appear larger when you click on the thumbnail. Currently, thumbnails are imported from the sa...
<div style=border: 1px solid #cccccc; width: 98%; height: 80%; margin: 10px;><div style=position: relative; border: 1px solid red; width: 50%; height: 50%; margin: 0 auto;> <img src=ht...
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