DOM Enlightenment by Cody Lindley

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By Cody Lindley

With DOM Enlightenment, you’ll how you can control HTML extra successfully by means of scripting the rfile item version (DOM) with out a DOM library. utilizing code examples in cookbook sort, writer Cody Lindley (jQuery Cookbook) walks you thru smooth DOM options to illustrate how quite a few node items work.

Over the previous decade, builders have buried the DOM less than frameworks that simplify its use. This e-book brings those instruments again into concentration, utilizing suggestions and code local to trendy browsers. You’ll comprehend the position jQuery performs in DOM scripting, and use the DOM without delay in purposes for cellular units and particular browsers that require low overhead.
* comprehend JavaScript node items and their courting to the DOM
* research the houses and strategies of rfile, aspect, textual content, and DocumentFragment gadgets
* Delve into aspect node picking, geometry, and inline kinds
* upload CSS sort sheets to an HTML record and use CSSStyleRule gadgets
* arrange DOM occasions by utilizing varied code styles
* study the author’s imaginative and prescient for dom.js, a jQuery-inspired DOM Library for contemporary browsers

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Additional info for DOM Enlightenment

Sample text

DOCTYPE>. documentElement refers to . head refers to . body refers to . This is demonstrated in the following code. a. docu ment constructed from HTMLDocument()). The doctype is constructed from the DocumentType() constructor. childNodes list. hasFeature(), to ask the current docu‐ ment (for a boolean) what feature and level the browser has implemented/supports. For example, we can ask if the browser has implemented the Core DOM Level 3 specification by passing the name of the feature and the version to the hasFeature() method.

QuerySelector('ul')), it’s possible to get a dif‐ ferent node reference by traversing the DOM using the following properties: • parentNode • firstChild • lastChild • nextSibling • previousSibling In the following code example, I examine the Node properties providing DOM traversal functionality. querySelector('ul'); //What is the parentNode of the ul? nodeName); //logs body //What is the first child of the ul? nodeName); //logs comment //What is the last child of the ul? nodeName); /* logs text not comment, because there is a line break */ //What is the nextSibling of the first li?

In the following code, I select the

    element, which I then use to create a list of all the immediate child nodes contained inside the

      . log(ulElementChildNodes); /* logs an arraylike list of all nodes inside of the ul */ /* Call forEach as if it's a method of NodeLists so we can loop over the NodeList. log(item); //logs each item in the array }); Notes The NodeList returned by childNodes only contains immediate child nodes. , Text and Comment nodes). forEach was implemented in ECMAScript Edition 5.

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