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JavaScript at Wikibooks. JavaScript ( / ˈdʒɑːvəskrɪpt / ), often abbreviated as JS, is a programming language and core technology of the Web, alongside HTML and CSS. 99% of websites use JavaScript on the client side for webpage behavior. [ 10] Web browsers have a dedicated JavaScript engine that executes the client code.
Classes are defined in the HTML document (generated by the server or by JavaScript). They are used as selectors in CSS. Learn to use the browser inspectors of Firefox, lE, Chrome or Safari to inspect the webpages. By default much of the CSS and JavaScript resources are processed for efficiency.
The canvas element is part of HTML5 and allows for dynamic, scriptable rendering of 2D shapes and bitmap images. It is a low level, procedural model that updates a bitmap. HTML5 Canvas also helps in making 2D games . While the HTML5 canvas offers its own 2D drawing API, it also supports the WebGL API to allow 3D rendering with OpenGL ES .
To demonstrate specificity Inheritance Inheritance is a key feature in CSS; it relies on the ancestor-descendant relationship to operate. Inheritance is the mechanism by which properties are applied not only to a specified element but also to its descendants. Inheritance relies on the document tree, which is the hierarchy of XHTML elements in a page based on nesting. Descendant elements may ...
The syntax of JavaScript is the set of rules that define a correctly structured JavaScript program. The examples below make use of the log function of the console object present in most browsers for standard text output . The JavaScript standard library lacks an official standard text output function (with the exception of document.write ).
There are different JavaScript charting libraries available. Below is a comparison of which features are available in each. Free for education and non-profit use. [4] Paid for commercial applications. [5] Free for personal and non-commercial uses. [28] Paid for commercial applications.
In computer programming, a virtual method table ( VMT ), virtual function table, virtual call table, dispatch table, vtable, or vftable is a mechanism used in a programming language to support dynamic dispatch (or run-time method binding ). Whenever a class defines a virtual function (or method ), most compilers add a hidden member variable to ...
In Lua, "table" is a fundamental type that can be used either as an array (numerical index, fast) or as an associative array. The keys and values can be of any type, except nil. The following focuses on non-numerical indexes. A table literal is written as { value, key = value, [index] = value, ["non id string"] = value }. For example: