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
Search results page URL http://example.com/?search=search stringFrom Parameter Format to http://example.com/search/ search stringWe received a request from the other party that we would like this form...
I looked into what was wrong...I don't know because I have included arguments.TypeError: Cannot read property '2' of undefinedconstboard_preference={0:+, 1:○, 2:●, 3:■, 4:+};letboard= [[0,0,0,0,0,0,0,...
For example, to determine if data.value has been defined, if(typeof(data)!=='undefined'&typeof(data.value)!=='undefined'){ console.log('defined:'+data.value);}I understand that there is a way to d...
HTML<span:style={display:displayTitle} @dblclick=showInput()>{{node.title}}</span><input:style={display:displayTitleInput} type=text@blur=hideInput1@keydown=hideInput2:value=node.title&...
https://developers.google.com/analytics/devguides/collection/analyticsjs/advanced?hl=jaI have a vague understanding that the script tag you embed is igniting a script that collects logs from google-an...
Creating custom bindings for Knockout.js.For example, data-bind=MyBind:{value:vmCode,size:vmLength}, if the MyBind custom binding update method was called by a change in value(vmCode), or by size(vmCo...
I'm studying ruby on rails, and I don't know much about it, but I'd appreciate it if someone could tell me.Thank you in advance.StatusWe are trying to introduce a contact form to a website that we hav...
Ask the user to select the file and I am making an app to get the address of that file.
I would like to create this kind of drawing tool on the web browser.https://dl.dropboxusercontent.com/u/429437/html5/seminar/05-draw-tool1.htmlI understand that this is done using the canvas tag.Befor...
There are two list boxes (SELECTs) in HTML and When you change the selection of the first list,
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