Beginning JavaScript und CSS development with jQuery by Richard York

By Richard York

This booklet covers the jQuery JavaScript framework and the jQuery UI JavaScript framework to get extra effects extra speedy out of JavaScript programming. I disguise each one strategy uncovered by means of jQuery’s API, which includes easy methods to make universal, redundant initiatives cross even more speedy in much less code. I additionally hide how jQuery removes convinced cross-browser, cross-platform improvement complications just like the occasion version; not just does it get rid of those complications, however it additionally makes it more straightforward to paintings with occasions via decreasing the volume of code you should write to connect occasions. It even grants the facility to simulate events.

You must have a uncomplicated realizing of JavaScript. I overview a few easy JavaScript programming techniques, similar to the development API, yet i don't cross into nice aspect concerning the JavaScript language itself. You’ll are looking to have no less than a easy grab of the rfile item version, or DOM, and easy JavaScript programming syntax. also, you’ll want to know your approach round CSS and HTML, due to the fact that wisdom of these applied sciences can be assumed.

You’ll see how one can leverage the jQuery UI library to make graphically pushed UI widgets. jQuery provides the power to damage content material up between a number of tabs within the similar web page. you have got the power to customise the feel and appear of the tabs, or even to create a elegant appear and feel by means of supplying assorted results that are available in in case you mouse over tabs and click them. many of the UI components and methods include:

  • make any aspect draggable with the mouse
  • drag-and-drop person interfaces
  • lists which are sortable through drag-and-drop
  • re-size parts on a web page utilizing the mouse
  • entering a date right into a box utilizing a pleasant, available JavaScript-driven calendar that pops up if you click an enter field
  • custom pop-up dialogues which are like digital pop-up windows
  • a graphical slider bar, just like your media player’s quantity control

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Extra info for Beginning JavaScript und CSS development with jQuery

Example text

If you’d like to learn more about object-oriented JavaScript, I recommend Nicholas C. , 2009). As I touched on briefly in Chapter 1, jQuery provides its own event called ready, which is fired as soon as the DOM has finished loading, which is different from the onload or load event, in that with the load event, you have to wait for all the images to load too before that event will fire. Most of the time, you don’t need to wait so long; you just want to start working with the document and adding behavior as soon as the DOM has finished loading.

To make the display: block; declaration work in the next rule, you have to think about specificity in CSS. An ID is more specific than a class name, so to make the dialogue visible, you have to reference an ID name in the CSS rule. The approach I take is to give the 35 Part I: jQuery API element an ID name, in this case, tmpDialogueExample, and then reference the class name for the

for the dialogue via a descendant selector. tmp​ DialogueOn more specific than div#tmpDialogue, which means that when the class name tmpDialogueOn is present, the dialogue is on, and when it is not, the dialogue is off.

Ready); In Figure 2-8, you see that

  • elements containing the words Orange and Purple have the tmpSibling class name, indicating that all elements following the
  • element with ID name tmpYellow have been selected. ready); In Figure 2-9, the
  • elements with the words Red, Blue, and Green have the tmpSibling class name, indicating that all elements previous to the
  • element with ID name tmpYellow have been selected. Figure 2-9 Each of the methods, prev(), prevAll(), next(), and nextAll() also accepts a selector as the first argument, which allows you to filter the selection.

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