Download e-book for iPad: Beginning jQuery by Jack Franklin

By Jack Franklin

Starting jQuery is your step by step consultant to studying the jQuery library. jQuery is the most well-liked JavaScript library within the net developer's toolkit. Jack Franklin takes you from the fundamentals of having you all started with jQuery, all over to extending jQuery via writing your individual plug-ins. You'll realize top practices you could stick with, how one can keep away from universal errors, and you'll know about such a lot of of the issues that jQuery has to supply, together with the way you can:

* Use jQuery's strong instruments to dynamically replace content material in your website, together with DOM manipulation.
* expand jQuery's services by way of writing your individual plugins on best of the framework.
* Animate parts and construct your individual jQuery slider.
* hire most sensible practices and stay away from universal blunders made through beginners.

JavaScript is a strong language yet each internet developer needs to navigate the difficult matters round cross-browser inconsistencies. starting jQuery teaches you the way to exploit jQuery to prevent spending it slow solving those browser insects - letting you consider what quite concerns to you. all through starting jQuery, you'll become aware of how expressive but concise jQuery's code is and what sort of swifter and effective you could improve with jQuery!

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Extra info for Beginning jQuery

Sample text

Ready(onReady); But in practice, it’s easier just to create the function and pass it immediately into the event handler without explicitly naming it first. By doing this, you create an anonymous function, a function that doesn’t have a name. html, you’ll see a red background! ready(function() {}) is so common, jQuery has a handy shortcut. You can simply do the following: $(function() { }); And that means exactly the same thing. If jQuery detects you’ve passed it a function, it will presume that function should be executed on the DOM already.

Parent() is: [

. parents() to give back the body and html elements. However, sometimes you may want all the parents up to the body element, so something you often need to do is filter out the et of elements that parents() returns. There are two ways of doing this. The first is to use jQuery filters. eq() method to filter your results down to one result. com/category/traversing/filtering/). 37 CHAPTER 3 N TRAVERSING THE DOM The method that interests us right now is not(). I will also cover the rest—some in this chapter and some elsewhere in the book.

If you’ve got a set of elements and call a method, more often than not, jQuery will implicitly do the looping for you. This is really useful, but it can be a bit confusing, so just remember that jQuery will always loop for you if it can. main p>li a"); But the downside of those selectors is that the more complex they are, the more time they take to run, and the slower your code will execute. jQuery parses its CSS selectors from right to left, so what that last example does is u Locates all anchor elements.

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