Tutoriais HTML e CSS - Construa seu website - HTML.net. Tutoriais CSS | HTML | XHTML | Normas do W3C | Tableless | Web Standards | Acessibilidade. A re-introduction to JavaScript - MDN Docs. Why a re-introduction? Because JavaScript is notorious for being the world's most misunderstood programming language. It is often derided as being a toy, but beneath its layer of deceptive simplicity, powerful language features await. JavaScript is now used by an incredible number of high-profile applications, showing that deeper knowledge of this technology is an important skill for any web or mobile developer. It's useful to start with an overview of the language's history. Several months later, Microsoft released JScript with Internet Explorer 3. Because it is more familiar, we will refer to ECMAScript as "JavaScript" from this point on.
Unlike most programming languages, the JavaScript language has no concept of input or output. Overview JavaScript is a multi-paradigm, dynamic language with types and operators, standard built-in objects, and methods. Let's start off by looking at the building blocks of any language: the types. And there are some built-in Error types as well.
Numbers. The W3C Markup Validation Service. The W3C CSS Validation Service.