Found 6704 Articles for Javascript

The double negation(!! ) operator is the! Operator twice and calculates the truth value of a value. It returns a Boolean value, which depends on the truthiness of the expression.Consider (!!p) as !(!p), here’s an example:If p is a false value, !p is true, and !!p is false. If p is a true value, !p is false, and !!p is true.Here’s another example:0 === false is false. !!0 === false is true. !!0 === false !!parseInt("foo") === false !!1 === true !!-1 === true !!false === false !!true === true

  npmnpm is generally used for managing Node.js modules and does nested dependency tree. It also works for front-end and used for developer tools like Grunt, CoffeeScript, etc.Without using nested dependencies it is difficult to avoid dependency conflicts. So, using npm has proven to be great.Whatever you add in Node is structured as modules. On using NPM for browser-side dependencies, you'll structure your code like Node.Here’s the dependency structure:project root [node_modules] -> dependency P -> dependency Q [node_modules] -> dependency P -> dependency R [node_modules] -> dependency Q [node_modules] -> dependency P -> dependency SBower Bower requires a flat dependency tree and ... Read More

In this tutorial, we will learn how to include JavaScript in HTML Documents. To include JavaScript in HTML Documents, use the tag. JavaScript can be implemented using JavaScript statements that are placed within the ... . You can place the tags, containing your JavaScript, anywhere within your web page, but it is normally recommended that you should keep it within the tags. We will discuss the following three approaches to include JavaScript in HTML documents − Embedding code (within head or body) Inline Code (inside any element) External file (outside the HTML file) By Embedding ... Read More

In JavaScript, undefined is a type, whereas null an object.undefinedIt means a variable declared, but no value has been assigned a value.For example,var demo; alert(demo); //shows undefined alert(typeof demo); //shows undefinednullWhereas, null in JavaScript is an assignment value. You can assign it to a variable.For example,var demo = null; alert(demo); //shows null alert(typeof demo); //shows object

JavaScriptThe base programming language in all these. ES5 and ES6 are just different versions of this languageCoffeeScriptCoffeeScript is a programming language which transcompiles to JavaScript. It’s a compiler layer on top of JavaScript.TypeScriptA language that compiles down to JavaScript. TypeScript is a method to create JavaScript code by writing it in the TypeScript dialect and compiles to JavaScript. TypeScript is a superset of JavaScript.ES5 and ES6CoffeeScript & TypeScript are the ones that support ES6 features. The compiler convert code into JavaScript (ES5). ES6 is next generation JavaScript.

JavaScriptJavaScript is a language based on ECMAScript. A standard for scripting languages like JavaScript, JScript is ECMAScript. JavaScript is considered as one of the most popular implementations of ECMAScript.ECMAScriptThe full form of ECMA is European Computer Manufacturer's Association. ECMAScript is a Standard for scripting languages such as JavaScript, JScript, etc. It is a trademark scripting language specification.JScriptJScript released in 1996 by Microsoft, as Microsoft’s dialect of ECMAScript. JScript and JavaScript are different names for the same language. They have different names to avoid trademark issues.

JavaScriptJavaScript was first known as LiveScript, but Netscape changed its name to JavaScript, possibly because of the excitement being generated by Java. JavaScript made its first appearance in Netscape 2.0 in 1995 with the name LiveScript. The general-purpose core of the language has been embedded in Netscape, Internet Explorer, and other web browsers.The standard of scripting languages like JavaScript is ECMAScript.ECMAScriptThe full form of ECMA is European Computer Manufacturer's Association. ECMAScript is a Standard for scripting languages such as JavaScript, JScript, etc. It is a trademark scripting language specification. JavaScript is a language based on ECMAScript. A standard for scripting ... Read More

This tutorial teaches us to get the date and time in JavaScript. Nowadays, JavaScript is the most popular programming language used for user interaction with the browser. We can say that it is hard to find a single web application that does not use JavaScript.The purpose of creating this tutorial is to make programmers familiar with the Date() object. Users can get today’s date and current time using the date class. While developing the applications, programmers maybe need to show the current date and time according to the user’s local zone, and we can fill this requirement using the date ... Read More

To get the current date in JavaScript, use the getDate() method.ExampleYou can try to run the following code get the date:           Today's Date       Get Date                         function myFunction() {              var date = new Date();              var n = date.getDate();              document.getElementById("test").innerHTML = n;           }            

The 8th edition, known as ECMAScript 2017, is the current JavaScript version, released in June 2017. JavaScript is a dynamic computer programming language.JavaScript It is lightweight and most commonly used as a part of web pages, whose implementations allow a client-side script to interact with the user and make dynamic pages. JavaScript is an interpreted programming language with a object-oriented capabilities.The  ECMA-262 Specification defined a standard version of the core JavaScript language.JavaScript is a lightweight, interpreted programming language.Designed for creating network-centric applications.Complementary to and integrated with Java.Complementary to and integrated with HTML.Open and cross-platform.