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
What is the most efficient way to estimate the similarity between n arrays?For example, array1=['aaa', 'bbb', 'ccc', 'dd']array2 = ['bbb', 'ccc']array3 = ['aaa', 'ccc', 'ddd', 'eee']array4 = ['aaa', '...
Note*AdditionalThis question has not been resolved because we have not received an answer to the following questions, but the fundamental problem of the questioner has been resolved and has been subst...
I would like to adjust the arrangement of the images.There are two main ones.FirstI'd like to arrange the first stage evenly at both ends of the second stage.→ Currently, things are not going well, so...
If there is an array similar to the following, containments=[ { 'id' : 1, 'category' : -1, 'question' : -1, 'answer' : -1} , { 'id' : 2, 'category' : -1, 'question' : 0, 'answer' : -1} , { 'id': 3, 'c...
I want to put a border on the span tag when I hover, but it doesn't work.What should I do to make it work?<ul class=nav> <class=nav-item>a class=navbar-link href=/xxx.html>span class=li...
Prerequisites/What you want to achieveI want to be able to see only certain channels on youtube, so I try to get the name of the youtube channel on Tampermonkey (Javascript) and move the code to close...
I created the class below, but I want to substitute the thumbnailIMG declared outside the if statement inside the if statement, but the value is not substituted.I just started writing code in javascri...
<nuxt-link> and some code using the to attribute did not make sense, so I would like to ask you a question.Below is the nuxt-link.Bind the to attribute and pass the to (argument 1, argument 2).&...
Ideally, if 1 is checked, the console log displays 1 checked.When 1 and 3 are checked, the console log displays 1 and 3 checked.Once 1 and 2 and 3 are checked, I would like to make a check decision li...
I am writing a script to read and print excel in the browser client script (javascript).I'd like to pop up a display like Processing... because it takes time from the start of the excel application to...
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