JavaScript Introduction - W3Schools
WEBBJavaScript and Java are completely different languages, both in concept and design. JavaScript was invented by Brendan Eich in 1995, and became an ECMA standard in 1997. ECMA-262 is the official name of the standard. ECMAScript is the official name of the language. JavaScript Versions ».
Logical OR (||) - JavaScript | MDN - MDN Web Docs
WEBB25 sep. 2023 · The logical OR (||) (logical disjunction) operator for a set of operands is true if and only if one or more of its operands is true. It is typically used with boolean (logical) values. When it is, it returns a Boolean value. However, the || operator actually returns the value of one of the specified operands, so if this operator is used with non …
JavaScript first steps - Learn web development | MDN
WEBB12 mars 2024 · A first splash into JavaScript. Now you've learned something about the theory of JavaScript, and what you can do with it, we are going to give you a crash course on the basic features of JavaScript via a completely practical tutorial. Here you'll build up a simple "Guess the number" game, step by step. What went wrong? …
Beginner Javascript | Start Coding Today
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Introduction - JavaScript | MDN - MDN Web Docs
WEBB22 juni 2023 · The JavaScript documentation on MDN includes the following: Learn Web Development provides information for beginners and introduces basic concepts of programming and the Internet. JavaScript Guide (this guide) provides an overview about the JavaScript language and its objects. JavaScript Reference provides detailed …
JavaScript Operators - W3Schools
WEBBW3Schools offers free online tutorials, references and exercises in all the major languages of the web. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more.
Left shift (<<) - JavaScript | MDN - MDN Web Docs
WEBB18 aug. 2023 · The << operator is overloaded for two types of operands: number and BigInt.For numbers, the operator returns a 32-bit integer. For BigInts, the operator returns a BigInt. It first coerces both operands to numeric values and tests the types of them. It performs BigInt left shift if both operands become BigInts; otherwise, it converts both …
Learn JavaScript | web.dev
WEBBLearn JavaScript. An in-depth course on the basics of JavaScript. 28 activities.
JavaScript – Wikipedia
WEBBJavaScript. JavaScript on alun perin Netscapen kehittämä, pääasiassa verkkoympäristössä käytettävä ohjelmointikieli. JavaScript on dynaamisesti ja heikosti tyypitetty, tulkattava, oliopohjainen komentosarjakieli, jonka syntaksi perustuu löyhästi C-ohjelmointikieleen. Kielen semantiikka ja suunnittelu on saanut vaikutteita Self - ja ...
JavaScript | MDN - MDN Web Docs
WEBBJavaScript® (às vezes abreviado para JS) é uma linguagem leve, interpretada e baseada em objetos com funções de primeira classe, mais conhecida como a linguagem de script para páginas Web, mas usada também em vários outros ambientes sem browser, tais como node.js, Apache CouchDB e Adobe Acrobat. O JavaScript é uma linguagem …
Nullish coalescing operator - The Modern JavaScript Tutorial
WEBB23 apr. 2023 · The nullish coalescing operator is written as two question marks ??.. As it treats null and undefined similarly, we’ll use a special term here, in this article. For brevity, we’ll say that a value is “defined” when it’s neither null nor undefined.. The result of a ?? b is:. if a is defined, then a,; if a isn’t defined, then b.; In other words, ?? returns the first …
Learn Javascript
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