codeschool angular 4

'; import {toastrservice, Toast} from' Ngx-toastr '; Import * as Raven from ' Raven-js '; @Injectable () Export class Apperrorhandler implements ErrorHandler {constructor (private injector:injector, Private Ngzone:ngzone) {} private Get Toastr (): toastrservice {return This. Injector.get (Toastrservice); } handleError (Error:any):void{ raven.captureexception (error); This. Ngzone.run (() = { This. Toastr.error (' An error has occurred '); }); }}Back to the browser error

Angular HTTP is to get and save data. The main purpose is to fetch data from my JSON file. Directly on the code bar:1. First introduce the Promise mode: (direct code)Heroes.json: 12345678 { NBSP;NBSP; "data" : [ NBSP;NBSP;NBSP;NBSP; {"id": 1, "name": " Windstorm "}, NBSP;NBSP;NBSP;NBSP; {" id ": 2," Name ":" Bombasto "}, NBSP;NBSP;NBSP;NBSP; {" ID ": 3," "Name": "Magneta"}, NBSP;NBSP;NBSP;NBSP; {"id":

Angular 4.x NgIf usage, angularngif NgIf instructions The ngIf command is used to render then or else template content at a specified position based on the expression value. The then template is an inline template associated with the ngIf command by default unless it is bound to different values. The else template is null by default unless it is bound with the corresponding value. NgIf instruction syn

Angular 4.x NgTemplateOutlet and ngtemplateoutlet This command is used based on the existingTemplateRef Object, insert the corresponding embedded view. When the NgTemplateOutlet command is applied[ngTemplateOutletContext] Attribute to setEmbeddedViewRef . The bound context should be an object.let Syntax to declare the property name of the bound context object. Tip: If the let syntax is not bound to any attr

(4) Initializing a data member with a parameter initialization table in a constructor is a more advocated notation. Test the function with the same (1).#include #include using namespace Std;Class Triangle{PublicDouble perimeter ();Double area ();void ShowMessage ();Triangle (double x,double y,double z): A (x), B (Y), C (z) {};PrivateDouble a,b,c;};void Triangle::showmessage (){coutcout}Double Triangle::p erimeter (){return a+b+c;}Double Triangle::area

Level4When we need to print multiple product name and product price, we want to reuse these 2 lines of codeIf you want to pass in a string, use "" Inside contains '. Using Ng-includeAfter loading the page, use Ajax call to get the page with the Include---------------------------Split Line-----------------------------A better-to-include HTML template is to create custom directiveUse directive to replace ng-include!Derective allows you to express behavior of your application!Use custom directive t