Download AngularJS: Novice to Ninja by Sandeep Panda PDF

By Sandeep Panda

AngularJS: amateur to Ninja is your quickly song path to studying AngularJS, the superheroic JavaScript framework. AngularJS offers the quickest, best solution to construct unmarried web page net applications.
What will I learn?
In this functional and fun-to-read publication, you'll examine the basics of AngularJS, akin to scopes, modules and controllers. You'll then circulation directly to extra subtle concepts, together with utilizing directives, filters and expressions to construct an entire unmarried web page net application.

Discover the ability of AngularJS's two-way information binding
Using AngularJS and TDD
Get to grips with modules, scopes, and controllers
Enhance your HTML with directives
Build an entire operating unmarried web page web publication software as you learn
And even more

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Additional resources for AngularJS: Novice to Ninja

Sample text

Figure 2-10. Mounting the component As you see, two methods were called without any arguments. The method component DidMount() is usually the more interesting of the two. getDOMNode() if you need, for example, to get the dimensions of the component. You can also do any sort of initialization work for your component now that your component is alive. Next, what happens when you type “s” to make the text “Bobs”? info | 31 Figure 2-11. Updating the component The method componentWillUpdate(nextProps, nextState) is called with the new data that will be used to rerender the component.

Props as you see fit to build your UI in your render() method. But sometimes you want to take a value passed to your component and use it to construct the initial state. There’s nothing wrong with this, only that the callers of your component may expect the property (text in the example above) to always have the latest value and the example violated this expectation. g. calling the property something like defaultText or initial Value instead of just text. info Chapter 4 illustrates how React solves this for its own implementa‐ tion of inputs and textareas where people may have expectations coming from their prior HTML knowledge.

In Figure 3-8 for example, there is only one change required to the cell and it’s not necessary to rerender the whole table. By computing the minimum set of changes and batching DOM operations, React “touches” the DOM lightly as it’s a known problem that DOM operations are slow (compared to pure JavaScript operations, function calls, etc) and are often the bottleneck in rich web applications’ rendering performance. Long story short: React has your back when it comes to performance and updating the UI by: * touching the DOM lightly * using event delegation for user interactions Search Next, let’s add a search feature to the Excel component that allows people to filter the contents of the table.

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