New PDF release: Beginning JavaScript with DOM Scripting and Ajax (2nd

By Christian Heilmann, Russ Ferguson

ISBN-10: 1430250933

ISBN-13: 9781430250937

Starting JavaScript with DOM Scripting and Ajax is a vital source for contemporary JavaScript programming. This thoroughly up-to-date moment variation covers every little thing you must comprehend to get up-to-speed with JavaScript improvement and upload dynamic improvements to web content, correct from the fundamentals. in addition to targeting client-side JavaScript, additionally, you will how one can paintings with the Browser item version, the record item version (DOM), the right way to use XML and JSON in addition to converse with provider part scripts comparable to Hypertext Preprocessor. learn how to:
* build strong JavaScript syntax following glossy coding practices
* Use JavaScript to speak with the server and retrieve data
* Dynamically control markup, validate varieties and care for images
* Debug purposes utilizing positive aspects contained in the browser

JavaScript is without doubt one of the most crucial applied sciences on the internet. It presents the capability so as to add dynamic performance on your websites and serves because the spine of Ajax-style internet improvement. starting JavaScript with DOM Scripting and Ajax will take you from being a JavaScript amateur to paintings freely with this significant know-how - start your JavaScript trip this present day!

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Additional resources for Beginning JavaScript with DOM Scripting and Ajax (2nd Edition)

Sample text

DHTML was one of the big buzz words of the IT and web development industry in the late 1990s and beginning of the millennium. ■■Note DHTML, or Dynamic HTML, was never a real technology or World Wide Web Consortium (W3C) standard—it was merely a term invented by marketing and advertising agencies. DHTML is JavaScript interacting with cascading style sheets (CSS) and web documents (written in HTML) to create seemingly dynamic pages. With this, developers have been able to create effects in the browser that were previously difficult or impossible to build in a browser.

Table 2-3. Comparisons in JavaScript Operator Description Example == Checks whether the left and right operands are equal 123 == 234 returns false. 123 == 123 returns true. === Checks whether the left and right operands are equal and whether the data types are equal 123 ==="234" returns false. 123 === 123 returns true. = 123 returns false. = 234 returns true. > Checks whether the left operand is greater than the right 123 > 234 returns false. 234 > 123 returns true. >= Checks whether the left operand is greater than or equal to the right 123 >= 234 returns false.

Comparing Data Table 2-3 lists some of the more commonly used comparison operators. Table 2-3. Comparisons in JavaScript Operator Description Example == Checks whether the left and right operands are equal 123 == 234 returns false. 123 == 123 returns true. === Checks whether the left and right operands are equal and whether the data types are equal 123 ==="234" returns false. 123 === 123 returns true. = 123 returns false. = 234 returns true. > Checks whether the left operand is greater than the right 123 > 234 returns false.

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Beginning JavaScript with DOM Scripting and Ajax (2nd Edition) by Christian Heilmann, Russ Ferguson


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