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
It took a long time because I was in between work, but I finally edited it!It's like this right now.↓$(function(){ var duration = 300; variation2 = 500; $(#pc-page-box1).on(mouseover, function(){ $(th...
During react practice, I rewrite the app.js of the app created by create-react-app, and I make simple components and load and move them.NumberOfGames component is input field, PrintBasicInfo component...
Hello,I am currently studying d3.js and drawing line graphs.JSON data for intermittent dates is passed to the x-axis, but the scale for the specified date is not displayed.Displays the date between th...
On the site created by WordPress, we have created a feature that allows you to zoom in and out of images by manipulating css left, top, transform:scale in jQuery/JavaScript.In addition, I would like t...
I would like to take over the conversion tag attached to the URL to the destination.If it is a tag, it can be done by adding it to href in advance, but It cannot be moved by JS.So I decided to adjust ...
I'm a complete beginner.I bought the book this time and immediately moved the sample code, but the javascript part was not reflected at all.The code is as follows.I would appreciate it if you could le...
I would like to replace process.env for testing purposes.Currently, we are replacing it as follows.Is there a smarter way?describe('test', function(){ beforeEach(function(){ this.env = process.env; pr...
Please teach me.What should I write and how?What do you want to do?1. Display a list of cookies on the page and I would like to display a message if nothing has been saved yet.(e.g. Not saved yet)2. I...
cake$this->Form->error('Test.id', null, ['wrap'=>'p', 'class'=>'error-message']);html<div><div><p><input type=text name=data[test][id]id=test_id class=test_class requi...
As you can see in the title, I have a question because I am struggling with how to pass bound values from view to controller using ng-init.The assumption is that there are n items_list in one shop, an...
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