Learn Javascript Tutorial

  Learn Javascript Tutorial 

Our JavaScript Tutorial is designed for beginners and professionals both. JavaScript is used to create client-side dynamic pages.

JavaScript is an object-based scripting language which is lightweight and cross-platform.

JavaScript is not a compiled language, but it is a translated language. The JavaScript Translator (embedded in the browser) is responsible for translating the JavaScript code for the web browser.

what is Javascript 

JavaScript (js) is a light-weight object-oriented programming language which is used by several websites for scripting the webpages. It is an interpreted, full-fledged programming language that enables dynamic interactivity on websites when applied to an HTML document. It was introduced in the year 1995 for adding programs to the webpages in the Netscape Navigator browser. Since then, it has been adopted by all other graphical web browsers. With JavaScript, users can build modern web applications to interact directly without reloading the page every time. The traditional website uses js to provide several forms of interactivity and simplicity.

Although, JavaScript has no connectivity with Java programming language. The name was suggested and provided in the times when Java was gaining popularity in the market. In addition to web browsers, databases such as CouchDB and MongoDB uses JavaScript as their scripting and query language.

Features of JavaScript

There are following features of JavaScript:

1. All popular web browsers support JavaScript as they provide built-in execution environments.
2. JavaScript follows the syntax and structure of the C programming language. Thus, it is a structured programming language.
3. JavaScript is a weakly typed language, where certain types are implicitly cast (depending on the operation).
4. JavaScript is an object-oriented programming language that uses prototypes rather than using classes for inheritance.

It is a light-weighted and interpreted language. It is a case-sensitive language. JavaScript is supportable in several operating systems including, Windows, macOS, etc. It provides good control to the users over the web browsers. History of JavaScript In 1993, Mosaic, the first popular web browser, came into existence. In the year 1994, Netscape was founded by Marc Andreessen. He realized that the web needed to become more dynamic. Thus, a 'glue language' was believed to be provided to HTML to make web designing easy for designers and part-time programmers. Consequently, in 1995, the company recruited Brendan Eich intending to implement and embed Scheme programming language to the browser. But, before Brendan could start, the company merged with Sun Microsystems for adding Java into its Navigator so that it could compete with Microsoft over the web technologies and platforms. Now, two languages were there: Java and the scripting language. Further, Netscape decided to give a similar name to the scripting language as Java's. It led to 'Javascript'. Finally, in May 1995, Marc Andreessen coined the first code of Javascript named 'Mocha'. Later, the marketing team replaced the name with 'LiveScript'. But, due to trademark reasons and certain other reasons, in December 1995, the language was finally renamed to 'JavaScript'. From then, JavaScript came into existence. Application of JavaScript JavaScript is used to create interactive websites. It is mainly used for: Client-side validation, Dynamic drop-down menus, Displaying date and time, Displaying pop-up windows and dialog boxes (like an alert dialog box, confirm dialog box and prompt dialog box), Displaying clocks etc. JavaScript Example <script>   document.write("Hello JavaScript by JavaScript");   </script>   Test it Now A detailed explanation of first JavaScript example is given in next chapter. JavaScript Index JavaScript Tutorial JavaScript Introduction JavaScript Example External JavaScript JavaScript Basics JavaScript Comment JavaScript Variable JavaScript Global Variable JavaScript Data Types JavaScript Operators JavaScript If Statement JavaScript Switch JavaScript Loop JavaScript Function JavaScript Objects JavaScript Object JavaScript Array JavaScript String JavaScript Date JavaScript Math JavaScript Number JavaScript Boolean JavaScript DataView JavaScript Function JavaScript handler JavaScript JSON JavaScript Number JavaScript Reflect JavaScript RegExp JavaScript Symbol JavaScript BOM Browser Objects 1) Window Object 2) History Object 3) Navigator Object 4) Screen Object JavaScript DOM 5) Document Object getElementById getElementsByName getElementsByTagName JavaScript innerHTML property JavaScript innerText property JavaScript Validation JavaScript form validation JavaScript email validation JavaScript OOPs JavaScript Class JavaScript Object JavaScript Prototype JavaScript constructor Method JavaScript static Method JavaScript Encapsulation JavaScript Inheritance JavaScript Polymorphism JavaScript Abstraction JavaScript Cookies JavaScript Cookies Cookie Attributes Cookie with multiple Name Deleting Cookies JavaScript Events HTML/DOM Events JavaScript Misc JavaScript this Keyword JavaScript Debugging JavaScript Hoisting JavaScript Strict Mode JavaScript Advance JavaScript TypedArray JavaScript Set JavaScript Map JavaScript WeakSet JavaScript WeakMap Interview Questions JavaScript Interview Questions JavaScript Methods JavaScript Array Object JavaScript Array Array concat() method Array copywithin() method Array every() method Array fill() method Array filter() method Array find() method Array findIndex() method Array forEach() method Array includes() method Array indexOf() method Array join() method Array lastIndexOf() method Array map() method Array pop() method Array push() method Array reverse() method Array shift() method Array slice() method Array sort() method Array splice() method Array unshift() method JavaScript DataView Object JavaScript DataView DataView getFloat32() method DataView getFloat64() method DataView getInt8() method DataView getInt16() method DataView getInt32() method DataView getUint8() method DataView getUint16() method DataView getUint32() method JavaScript Function Object JavaScript Function Function apply() method Function bind() method Function call() method Function toString() method JavaScript Date Object JavaScript Date date getDate() method date getDay() method date getFullYears() method date getHours() method date getMilliseconds() method date getMinutes() method date getMonth() method date getSeconds() method date getUTCDate() method date getUTCDay() method date getUTCFullYears() method date getUTCHours() method date getUTCMinutes() method date getUTCMonth() method date getUTCSeconds() method date setDate() method date setDay() method date setFullYears() method date setHours() method date setMilliseconds() method date setMinutes() method date setMonth() method date setSeconds() method date setUTCDate() method date setUTCDay() method date setUTCFullYears() method date setUTCHours() method date setUTCMilliseconds() method date setUTCMinutes() method date setUTCMonth() method date setUTCSeconds() method date toDateString() method date toISOString() method date toJSON() method date toString() method date toTimeString() method date toUTCString() method date valueOf() method JavaScript handler Object JavaScript handler handler apply() method handler construct() method handler defineProperty() method handler deleteProperty() method handler get() method handler getOwnPropertyDescriptor() method handler getPrototypeOf() method handler has() method handler isExtensible() method handler ownKeys() method handler preventExtensions() method handler set() method handler setPrototypeOf() method JavaScript JSON Object JavaScript JSON JSON.parse() method JSON.stringify() method JavaScript Map Object JavaScript Map Map clear() method Map delete() method Map entries() method Map forEach() method Map get() method Map has() method Map keys() method Map set() method Map values() method JavaScript Math Object JavaScript Math Math abs() method Math acos() method Math asin() method Math atan() method Math cbrt() method Math ceil() method Math cos() method Math cosh() method Math exp() method Math floor() method Math hypot() method Math log() method Math max() method Math min() method Math pow() method Math random() method Math round() method Math sign() method Math sin() method Math sinh() method Math sqrt() method Math tan() method Math tanh() method Math trunc() method JavaScript Number Object JavaScript Number Number isFinite() method Number isInteger() method Number parseFloat() method Number parseInt() method Number toExponential() method Number toFixed() method Number toPrecision() method Number toString() method JavaScript RegExp Object JavaScript RegExp RegExp.exec() method RegExp.test() method RegExp.toString() method JavaScript Object JavaScript Object Object.assign() method Object.create() method Object.defineProperty() method Object.defineProperties() method Object.entries() method Object.freeze() method getOwnPropertyDescriptor() method getOwnPropertyDescriptors() method getOwnPropertyNames() method getOwnPropertySymbols() method Object.getPrototypeOf() method Object.is() method preventExtensions() method Object.seal() method Object.setPrototypeOf() method Object.values() method JavaScript Reflect Object JavaScript Reflect Reflect.apply() method Reflect.construct() method Reflect.defineProperty() method Reflect.deleteProperty() method Reflect.get() method getOwnPropertyDescriptor() method Reflect.getPrototypeOf() method Reflect.has() method Reflect.isExtensible() method Reflect.ownKeys() method preventExtensions() method Reflect.set() method Reflect.setPrototypeOf() method JavaScript Set Object JavaScript Set Set add() method Set clear() method Set delete() method Set entries() method Set forEach() method Set has() method Set values() method JavaScript String Object String charAt() method String charAt() method String charCodeAt() method String concat() method String indexOf() method String lastIndexOf() method String search() method String match() String replace() method String substr() method String substring() method String slice() method String toLowerCase() method toLocaleLowerCase() method String toUpperCase() method toLocaleUpperCase() method String toString() method String valueOf() method JavaScript Symbol Object JavaScript Symbol Symbol.for() method Symbol.keyFor() method Symbol.toString() method Symbol Property Symbol.hasInstance Property isConcatSpreadable Property Symbol.match Property Symbol.prototype Property Symbol.replace Property Symbol.search Property Symbol.split Property Symbol.toStringTag Property Symbol.unscopables Property JavaScript TypedArray Object JavaScript TypedArray TypedArray copyWithin() method TypedArray entries() method TypedArray every() method TypedArray fill() method TypedArray filter() method TypedArray find() method TypedArray findIndex() method TypedArray forEach() method TypedArray includes() method TypedArray indexof() method TypedArray join() method TypedArray Keys() method TypedArray lastIndexof() method TypedArray map() method TypedArray reduce() method TypedArray reduceRight() method TypedArray reverse() method TypedArray set() method TypedArray Slice() method TypedArray some() method TypedArray sort() method TypedArray subarray() method TypedArray values() method toLocaleString() method TypedArray toString() method JavaScript WeakMap Object JavaScript WeakMap WeakMap delete() method WeakMap get() method WeakMap has() method WeakMap set() method JavaScript WeakSet Object JavaScript WeakSet WeakSet add() method WeakSet delete() method WeakSet has() method Prerequisite Before learning JavaScript in depth, you must have the basic knowledge of HTML. Audience We have developed this JavaScript tutorial for beginners and professionals both. There are given a lot of examples with JavaScript editor. So, you can easily edit your JavaScript code which will help you to learn JavaScript easily. Problem We assure you that you will not find any problem in our JavaScript tutorial. But, if you find any mistake, you can post it in our comment section.