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The Prototype JavaScript Framework is a JavaScript framework created by Sam Stephenson in February 2005 as part of Ajax support in Ruby on Rails. It is implemented as a single file of JavaScript code, usually named prototype.js. Prototype is distributed standalone, but also as part of larger projects, such as Ruby on Rails, script.aculo.us and ...
It introduced the getElementById function as well as an event model and support for XML namespaces and CSS. DOM Level 3, published in April 2004, added support for XPath and keyboard event handling, as well as an interface for serializing documents as XML. HTML5 was published in October 2014. Part of HTML5 had replaced DOM Level 2 HTML module.
The built-in JavaScript libraries use the same naming conventions as Java. Data types and constructor functions use upper camel case (RegExp, TypeError, XMLHttpRequest, DOMObject) and methods use lower camel case (getElementById, getElementsByTagNameNS, createCDATASection).
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 .
Dynamic HTML, or DHTML, is a term which was used by some browser vendors to describe the combination of HTML, style sheets and client-side scripts (JavaScript, VBScript, or any other supported scripts) that enabled the creation of interactive and animated documents.
Modernizr is a JavaScript library that detects the features available in a user's browser. This lets web pages avoid unsupported features by informing the user their browser is not supported or loading a polyfill .
In the above example, document.getElementById is declared to return an HTMLElement, but you know that it always return an HTMLCanvasElement, which is a subtype of HTMLElement, in this case. If it is not the case, subsequent code which relies on the behaviour of HTMLCanvasElement will not perform correctly, as in Typescript there is no runtime ...
JavaScript has many possibilities, for example adding text, including links, at the desired positions. This added content may depend on content on the HTML source page produced by the server; for example it may depend on HTML elements with an ID, by applying getElementById. The position of insertion may be specified by insertBefore.