Professional JavaScript frameworks : Prototype, YUI, Ext JS, by Leslie M Orchard; Scott Koon; et al

By Leslie M Orchard; Scott Koon; et al

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By Leslie M Orchard; Scott Koon; et al

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Extra info for Professional JavaScript frameworks : Prototype, YUI, Ext JS, Dojo and MooTools

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0 and up. Implements the Adobe language known as ActionScript, which is primarily an implementation of ECMAScript. V8 Google An open-source (BSD) ECMAScript engine used in Google’s Chrome browser (which is based on WebKit). com/p/v8/ Elektra Opera The proprietary layout and JavaScript engine used by the Opera browser versions 4-6. 0+). This engine is also implemented on many of the mobile and platform devices that support Opera, such as Nintendo Wii, and Nintendo DS. Adobe’s Dreamweaver (up to CS4) uses Presto.

Getting back to this particular line of code, I’ve used the var statement to declare a variable. I’ll go into this in more detail in Chapter 2. For now it’s enough to know that I declared a variable and assigned a value to it –– a new instance of the global Date object. It just so happens that in JavaScript, when you create a date and do not say specifically which date, it automatically becomes today’s date and time. This is what I’ve done here. toString() + “

”); Earlier in this chapter I spoke a bit about the DOM (Document Object Model).

Chapter 1: Introduction to JavaScript Before its full release, the name was changed to LiveScript and later to JavaScript. 0 was released to the world with the first official version the language. 0 with a similar feature called JScript (but with some minor improvements). Over the coming years, the two companies would move virtually neck and neck with enhancements to the language. By June 1997, the international standards body Ecma approved a submission by Netscape to standardize the language. This standardized version of the language would be known as ECMAScript (ECMA-262) and was revised four times between 1997 and 2009.

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