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JavaScript Tutorial

JavaScript Tutorial

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JavaScript 101 Introduction I've written this very brief guide to JavaScript just as an aid for people new to the language and who need a basic starting point to see what the syntax looks like and to get a feeling for some of its features. This article's main purpose is to give readers new to the language a glimpse of the JavaScript environment and to hopefully spur them onto further reading/learning. Debugging Asynchronous JavaScript with Chrome DevTools - HTML5 Rocks Introduction A powerful feature that makes JavaScript unique is its ability to work asynchronously via callback functions. Assigning async callbacks let you write event-driven code but it also makes tracking down bugs a hair pulling experience since the JavaScript is not executing in a linear fashion. Luckily, now in Chrome DevTools, you can view the full call stack of asynchronous JavaScript callbacks! Once you enable the async call stack feature in DevTools, you will be able to drill into the state of your web app at various points in time.

#150: Hey designers, if you only know one thing about JavaScript, this is what I would recommend Sometimes, to start a journey into learning something huge and complex, you need to learn something small and simple. JavaScript is huge and complex, but you can baby step into it by learning small and simple things. If you're a web designer, I think there is one thing in particular that you can learn that is extremely empowering. This is the thing I want you to learn: When you click on some element, change a class on some element. Boiling that down to the absolute essentials, imagine we have a button and a div:

WTF.js The last ten years have been interesting, to put it mildly. Ten years ago, some of us bought desktops, some of us bought laptops, and those of us with loads of cash bought both. Since then, you have a desktop for heavy-duty work, a laptop for portable stuff, and you may even have both a Mac and a PC.

Kyle Simpson asks "JavaScript: WTF?" Kyle Simpson is a freelance Open Web Evangelist based in Austin Texas. Kyle’s talk at Forward 2, entitled “What the JavaScript”, tries to “pull out the crazy” from JavaScript leading to cleaner, more elegant, more readable code and inspire people to contribute to the open source community. Kyle’s book series, You Don’t Know JS, are available on GitHub, open source and free, as well as being published by O’Reilly. Code WTFs There are lots of people talking about WTF-style code in JavaScript, but many of these pale in comparison to the real WTFs of the language.

manipuler le Document objet model (DOM) le Document objet model (DOM) le Document objet model plus généralement appelé dom permet d'avoir accès dynamiquement a la page. Grâce a lui on peut créer modifier et supprimer les élément d'une page, il fournis aussi plusieurs méthodes afin de se positionner dans une page grâce a la représentation de la page similaire a un arbre généalogique, il permet aussi d'obtenir des information sur un élément comme sa position sa taille ses attributs ...etc creation d'elements une balise en html Learn JavaScript: – JavaScript Scene – Medium There are so many JavaScript resources available out there, it’s hard to understand how much of it overlaps and how much is redundant. Not to mention the process of weeding out bad information. The fact is, most JavaScript training sucks.

Programming JavaScript Applications eBook (Paperless) – Learn JavaScript Formats: DAISY, ePub, Mobi, PDF Le Jardin de JavaScript Bien que JavaScript utilise une syntaxe avec accolades pour les blocs, il ne crée pas de portée "scope" de bloc; par conséquent, la seule portée du langage est la portée de fonction. function test() { // une portée "scope" for(var i = 0; i < 10; i++) { // pas une portée // count } console.log(i); // 10} Il n'existe pas d'espaces de noms "namespaces" en JavaScript, ce qui signifie que tout est défini dans un espace de noms commun partagé par tous.

Named function expressions demystified Introduction Surprisingly, a topic of named function expressions doesn’t seem to be covered well enough on the web. This is probably why there are so many misconceptions floating around. In this article, I’ll try to summarize both — theoretical and practical aspects of these wonderful Javascript constructs; the good, bad and ugly parts of them. In a nutshell, named function expressions are useful for one thing only — descriptive function names in debuggers and profilers. Well, there is also a possibility of using function names for recursion, but you will soon see that this is often impractical nowadays.

Mots réservés Introduction Cet annexe présente les mots réservés. Les mots réservés ne doivent pas être utilisés en tant que noms de variables, de fonctions, de méthodes ou d'identifiants d'objets parce-que ECMAScript spécifie une utilité spéciale pour eux. Mots actuellement réservés Voici la liste des mots réservés actuellement utilisés en JavaScript :

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