angular 2 best practices

So what to does lazy loading for router in Angular 2.The Nomarl-to-write a router in Angular 2:You are simplecmp and usercmp as child components. You also import {simplecmp, usercmp} from ' xxxxxx '.It won't be lazy loaded. Because you already has the reference to the child component.But it turn off to being very easy

1. Default angular request header: Here, accept and X-requested-with are the default configurations of $ HTTP. 2. Modify the default request header: (1) Global modification (entire module) Use $ httpprovider dependency VaR MyApp = Angular. module ('myapp', []); MyApp. config (function ($ httpprovider) {console. log ($ httpprovider. defaults. headers. common) //

Before doing a crud method on a page, in reality the Webapi module is often written in separate service, so modify the original design and structure, or need a lot of knowledge.2017.11.15 Add patch method to improve service program optimization notation2017.11.27 added promise return value processing, the server returns the error message after processing.Because all of the crud methods are written in the service, the code in the background is much simpler, and the callback needs more information

Two-way binding still exists in Angular 2 and Ng-model makes it simple. The syntax is a combination of the [input] and (output) syntax to represent, the data is being pushed out and pulled I N.Import {Component} from ' Angular2/core './todoservice '; @Component ( {' todo-input ', Template: ' [(Ngmodel)]= "Todomodule"> '}) Export class todoinput{ todomodule:string; Constructor (

This lesson discusses if and how to add dependencies, resolved by Angular ' s DI, to factory providers. The example used in this lesson builts upon the previous lesson on understanding factory providers.For example, the Loggerprovider need-to-use Consoleservice, as-you-put loggerprovider into ' providers ' array, we also Need to provide dependence which refer to Consoleservice, the "Do"providers: [ todoservice, consoleservice, , { = =

The application is simple and to build a color picker:When click the Rect box, it'll check the color value below and title color would also change.Color-picker.ts:Import {Component, Output, Eventemitter, Input} from "@angular/core"'./constants '; @Component ({ ' Color-picker ', moduleId:module.id, ' color-picker.component.html ') export class colorpicker{ @Input () color:string; @Output (new eventemitter (); = RED; = BLUE; C

Off TopicTo solve the blog title, because the first article commented that some people questioned the subject is far away, said half a day and angular material not half-hair relationship. In fact, my center in the second half of the "string Learning client development." Require () Don't confuse the Require () and requirejs here. It is interesting, however, that Typescript's module definition even supports both of these modular mechanism

Ngclass} From "Angular2/angular2",@Component ({ ' Todo-item-render '}) @View ({ directives: [Ngclass ], styles: [' . started{ color:green; } . Completed { text-decoration:line-through; } '], Template: ' [ng-class]= ' Todoinput.status ' >{{ Todoinput.title}} '}) Export class todoitemrender{ @Input () Todoinput:todomodel;}Many components require different styles based on a set of conditions.

Heros.ts:Import {Component} from "@angular/core"; Const Heroes=[{ID:1, Name: ' Superman '}, {ID:2, Name: ' Batman '}, {ID:5, Name: ' Batgirl '}, {ID:3, Name: ' Robin '}, {ID:4, Name: ' Flash '}]; @Component ({selector:' Heroes ', Styleurls: [' Heroes.component.css '], Template: 'ngfor="Let hero of heroes; let i = index; Trackby: Trackby (Hero); Let Iseven=even; Let Isfirst=first; Let Islast=last

Angular Learning (2): Controller definition summary, angularcontroller The above section summarizes the ng-view application, and separates the O M background into two interfaces for logical Controller processing. This article will summarize the knowledge used by the Controller in the project: $ Scope: scope object, which only represents the current Controller object. All objects in this scope are declared

> Div> Div> Div> P-tabpanel>Here is the TS code:MoveUp () {//Select only one on the right to move if( This. selectrightcondition This. selectrightcondition.length==1) {Let data= This. rightquerycondition; Let Index= 0; Data.foreach (record, i)= { if(record[' fieldcode ') = = = This. selectrightcondition[0][' Fieldcode ']) { returnindex =i; }}) var temp; if(index = = 0 | | index > DATA.LENGTH-1) { This. rightquerycondition =data; }

} from './vehicle-list.component'; import {vehiclecomponent} from './vehicle.component'; import {Vehicleservice} from './vehicle.service'; @Component ({selector:'Story-vehicles-root', Template: '', directives: [Router_directives], providers: [Vehicleservice]}) @RouteConfig ([{path:'/', Name:'Vehicles', Component:vehiclelistcomponent, Useasdefault:true}, {path:'/:id', Name:'Vehicle', component:vehiclecomponent}]) ExportclassVehiclescomponent {}----------------The list component, set Routerlink:ul

{clockcomponent} from './clock'; @Component ({selector:'app', directives: [Clockcomponent], Template: '" Number"Value="0"> "Click$.next (Inputnum.value)">Update"Time | Async "> `}) ExportclassApp {click$=NewSubject (). Map ((number)=({type:hour, payload:parseint (number)})); seconds$= Observable.interval ( +). Mapto ({type:second, payload:1}); Time Constructor (Store:store) { This. Time = store.Select('Clock'); Observable.merge ( This. click$, This. seconds$). Subscribe (Store.dispat

(2) Design The default constructor, that is, when the parameter is not specified, the default side length is 1. The required test functions are:int main (){Triangle Tri; //Call the default constructor, when no parameters are specified, the default side length is 1;Tri.showmessage ();return 0;}#include Operation Result:Week four 13 constructors for angular classes-2