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
There are two definitions of functions in JavaScript, but I don't know the difference or usage, so please let me know.Pattern 1 function hoge(a,b){ ...}Pattern 2 var hoge=function(a,b){ ...}Is hoge(a,...
I'm going to show you what's on the chrome console and what's on the console (iframe).I'd like to put it in a variable as a string and output it to html.What are the options?Thank you for your coopera...
I want to run gmaps.js on jsfiddle, but it doesn't workHow can I set it up?http://jsfiddle.net/Lsx7fabb/var type=';function ryo(){ type = 'ryo'; alert(Send location information as yomiireru.);}functio...
I want to run gmaps.js on jsfiddle, but it doesn't workHow can I set it up?http://jsfiddle.net/Lsx7fabb/var type=';function ryo(){ type = 'ryo'; alert(Send location information as yomiireru.);}functio...
When I ran this code, I got a strange resultfunctionprintFive(){ for(vari=0;i<5;i++){ setTimeout(function(){ console.log(i); }, i*1000); }}printFive();If you do this,01234If you think is going t...
I am using Angular.When accessed from a browser that does not support it, I usually look at UA and play it in a blacklist style, but I would like to make an error for all browsers that do not support ...
I am using Angular.When accessed from a browser that does not support it, I usually look at UA and play it in a blacklist style, but I would like to make an error for all browsers that do not support ...
Trying to create an animation using Three.jsI was looking for an animation library where I could manage the timeline and found TweenMax.js to be useful.However, I think I can think of other options, s...
I'm sorry for the direct link, but when I access the following site with a smartphone such as iPhone, the background image moves slowly according to the tilt of the smartphone.http://ignition.co/104Ar...
Trying to create an animation using Three.jsI was looking for an animation library where I could manage the timeline and found TweenMax.js to be useful.However, I think I can think of other options, s...
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