If you must begin utilizing AngularJS for actual, this can be the publication you would like. Its down-to-earth sensible strategy will quick educate you all you must find out about dependency injection using this flexible framework.

Overview

  • Understand the idea that of dependency injection
  • Isolate devices of code in the course of checking out JavaScript utilizing Jasmine
  • Create reusable elements in AngularJS

In Detail

Dependency injection allows larger trying out by way of permitting us to mock dependencies in checking out environments in order that we simply try out something at a time. It additionally permits us to write down extra maintainable code through decoupling our gadgets from their implementations. the inducement for utilizing it in AngularJS is to enable you transparently load mocked gadgets in tests.

This ebook is a realistic guide to get you began on dependency injection. it's going to additionally take you alongside the line to making testable and reusable code. making sure productiveness and balance are the 2 most vital issues that you're going to learn.

"Dependency Injection with AngularJS" will introduce you to AngularJS utilizing an easy pattern venture. through portraying other ways of constructing code modules, it is going to express you some great benefits of dependency injection. it will bring about the power to create reusable parts which can simply be tested.

You will examine every little thing you must understand how to exploit dependency injection with AngularJS.

What you are going to examine from this book

  • Create reusable elements propelled by way of the independence of elements from every one other
  • Run exams on actual browsers utilizing the Karma attempt runner
  • Set up Jasmine BDD testing
  • Set up and set up AngularJS
  • Change coupled code to loosely coupled injected dependencies
  • Create integration exams utilizing Protractor
  • Organize huge purposes utilizing dependency injection

Approach

This e-book is a pragmatic, hands-on method of utilizing dependency injection and imposing test-driven improvement utilizing AngularJS.

Who this booklet is written for

Dependency Injection with AngularJS is geared toward builders who're conscious of AngularJS yet have to start with utilizing it in actual existence purposes. additionally, builders who are looking to get into test-driven improvement with AngularJS can use this booklet as sensible consultant. whether you recognize approximately dependency injection, it will probably function an exceptional reference on the way it is used inside AngularJS. Readers are anticipated to have a few adventure with JavaScript.

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Temp>=min) arrReturn. push(value); }); go back arrReturn; } }]); [ 12 ] www. it-ebooks. details Chapter 1 The clear out now takes an non-compulsory argument because the minimal worth to reveal. for those who run the code with no altering the template, it really works precisely like prior to. to mirror the hot performance of our filter out, we now even have replaced the filter's identify to minimal. to use the recent function, we need to specify the minimal temperature as a filter out argument. whereas we're at it, we'll permit our clients come to a decision for themselves what minimal temperature they want to work out: minimal temperature: Celcius

  • {{ worth. day | uppercase}} : {{ price. temp }}

Our template now has an enter field within which the price tempMin is certain to the clear out as an issue, proven as follows: because the person alterations the worth of the enter field, the record is dynamically filtered. to begin the enter field with the price 15, all we need to do is upload $scope. tempMin = 15 to our heritage controller. Chart directives it isn't undesirable to work out our facts as an unordered checklist, yet displaying it in a chart would actually make our clients chuffed. we'll be utilizing a third-party library to render our chart and wrap it inside of an Angular directive. The target of this workout is to exploit our directive as a brand new HTML tag . this is often, through a long way, one of many coolest good points of Angular. For it slow the subtitle of the Angular site used to be in spite of everything "teaching HTML new tricks". Let's move forward and alter our template, so it makes use of our new directive: minimal temperature: Celcius [ thirteen ] www. it-ebooks. details Learning to Fly the true paintings is now delegated to our new directive, leaving the template fresh and concise: tempApp. directive('tempChart', [function(version) { go back { template: '

', hyperlink: function(scope, aspect, attrs) { var chart = new Morris. Line({ // identity of the point during which to attract the chart. point: 'container', // The identify of the knowledge checklist characteristic that comprises x-values. xkey: 'date', // a listing of names of information list attributes that include y-values. ykeys: ['temp'], // Labels for the ykeys -- could be displayed if you hover over the // chart. labels: ['Temperature'] }); scope. $watch(function() { chart. setData(angular. copy(JSON. parse(attrs. data))); }); } } }]); The tempChart directive encapsulates a charting library by means of taking info from the template and returning the rendered chart. one of many key components within the code snippet is the scope. $watch assertion with out a particular watchExpression. It easily waits for a $digest run through Angular and may replace the knowledge for the chart. $digest is administered each time a key's pressed and Angular calls $apply internally. an outstanding clarification of those suggestions is within the Angular guide at http://docs. angularjs. org/guide/concepts. The chart library we used is Morris. js (http://www.

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