Angular

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Chapter 44: How to Use ngif *NgIf: It removes or recreates a part of DOM tree depending on an expression evaluation. It is a structural directive and structural directives alter the layout of the DOM by adding, replacing and removing its elements. Section 44.1: To run a function at the start or end of *ngFor loop Using *ngIf NgFor provides Some values that can be aliased to local variables index -(variable) position of the current item in the iterable starting at 0 first -(boolean) true if the current item is the first item in the iterable last -(boolean) true if the current item is the last item in the iterable even -(boolean) true if the current index is an even number odd -(boolean) true if the current index is an odd number {{i}}
Section 44.4: Use *ngIf with*ngFor While you are not allowed to use *ngIf and *ngFor in the same div (it will gives an error in the runtime) you can nest the *ngIf in the *ngFor to get the desired behavior. Example 1: General syntax Example 2: Display elements with even index {{ item }} The downside is that an additional outer div element needs to be added. But consider this use case where a div element needs to be iterated (using *ngFor) and also includes a check whether the element need to be removed or not (using *ngIf), but adding an additional div is not preferred. In this case you can use the template tag for the *ngFor: This way adding an additional outer div is not needed and furthermore the element won't be added to the DOM. The only elements added in the DOM from the above example are the iterated div elements. Note: In Angular v4 has been deprecated in favour of and will be removed in v5. In Angular v2.x releases is still valid. GoalKicker.com – Angular 2 Notes for Professionals 158
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Angular 2 Angular 2 Notes for Profe
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Section 9.4: Bidirectional parent-c
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Section 32.1: Data driven form ....
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Section 61.4: Md2Datepicker .......
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Chapter 1: Getting started with Ang
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mkdir front cd front Just like we d
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System.import('app').catch(
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Prerequisites: Node.js v4 or greate
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This command will execute all the t
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packages tells the System loader ho
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{{message}} We're displaying the
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Section 1.6: Let's dive into Angula
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-tslint.json -typings.json Basic un
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Chapter 2: Components Angular compo
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TestBed.configureTestingModule({ de
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Chapter 3: Modules Angular modules
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Chapter 4: Pipes Function/Parameter
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Section 4.4: Debugging With JsonPip
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import { Observable } from 'rxjs/Ob
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template: ` {{value | truthy:'enabl
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Chapter 5: Page title How can you c
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ngForLoop.annotations = [ new angul
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} super(backend, defaultOptions); r
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Chapter 8: Templates Templates are
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} // Displays 'Mr. IQ', '', 'Bombas
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template. In this example, we wire
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History {{event}} `, providers: [
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} } @NgModule({ imports: [CommonMod
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import { Component, Inject } from '
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Chapter 10: Dynamically add compone
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@NgModule({ imports: [ BrowserModul
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templateUrl: './app/app.component.h
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Chapter 11: Directives Section 11.1
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Input, HostListener } from "@angula
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mouseenter.initEvent('mouseenter',
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Section 12.2: Input example @input
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handleData (data:any) { this.asyncD
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the error. Section 13.3: Using vali
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Section 14.3: Displaying current An
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Chapter 16: Routing Section 16.1: R
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] ... }, { }, ... path: 'users', co
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Basic precaution: Ensure you have t
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Add our router directives we will b
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Chapter 17: Routing (3.0.0+) Sectio
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Section 17.3: Using Resolvers and G
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main.ts import {bootstrap} from '@a
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Then, export the array of routes. p
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typings install jquery --global --s
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Chapter 19: Optimizing rendering us
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import { Component, OnDestroy } fro
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} GoalKicker.com - Angular 2 Notes
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} } }); The previous example uses a
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Chapter 23: Services and Dependency
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Section 23.3: Testing a Service Giv
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try { const result = await authServ
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} } let pattern:RegExp = /\S+@\S+\.
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Page 119 and 120: Chapter 26: Testing ngModel Is a ex
Page 121 and 122: Chapter 27: Feature Modules Section
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Page 137 and 138: 3. 4. 5. 6. 7. Performs compilation
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Page 179 and 180: Chapter 51: OrderBy Pipe How to wri
Page 182 and 183: Chapter 52: Angular 2 Change detect
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Page 188 and 189: Section 55.2: Live example A live e
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Chapter 65: Barrel A barrel is a wa
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Good now the Service Worker is up a
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Chapter 67: Testing an Angular 2 Ap
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testContext.keys().forEach(testCont
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how we call detectChanges() so that
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{ 'userId': 1, 'id': 3, 'title': 'e
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Chapter 68: angular-cli test covera
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Chapter 69: unit testing Section 69
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jesussegado Chapter 26 Jim Chapters
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