difference between angular 2 and angular 4

Angular 2 is coming. Wijmo is ready for welcoming. angularwijmo Angular is an excellent front-end JS framework and has been used in many Google products. Its core features are: MVVM, modularization, automated two-way data binding, semantic tags, and dependency injection. Six years later, Angular ushered in version 2.0.

This example for you to share the angular JS page between the switch and the value of the method, for everyone to refer to, the specific content of the following angular JS page between the switch and transfer value 1. Ui-router-based page Jump Pass(1) In the Angularjs app.js to define the route with Ui-router, for example, there are now two pages, a page (producers.html) placed a number of producers, clic

collapse or expand. `}) Export class App {} @NgModule ({declarations: [app, Collapseonclick], imports: [Browsermodule], Bootstrap: [App]}) Export class Appmodule {}platformbrowserdynamic (). Bootstrapmodule (appmodule);Collapsed-on-click.ts:Import {Directive, Hostlistener, hostbinding} from "@angular/core"; @Directive ({selector:' [Collapse-on-click] ', Exportas:' Collapsible '}) Export class Collapseonclick {collapsed:Boolean; Constructor ()

, calling the Dom's Val () method - $('span'). HTML (value); - }); + }); - Script> + Body> A HTML>When the mouse is lifted, get the value of the INPUT element and update it to the Span tab:2. Use angular JS to complete the same function:1 DOCTYPE HTML>2 HTML>3 HeadLang= "en">4 MetaCharSet= "UTF-8">5 ti

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

())}}}}}); We add the scope attribute to the command and print the content of tele and iele during the printing process. The result is as follows: We can see that the elements printed in the compile phase do not have the class attribute, but are printed in the pre-link and post-link phases, the class attribute is ng-scope ng-binding. The reason is: The elements obtained in the compile phase are telement, that is, templateelement, which is the original element. In the link phase (whether pre-lin

Atitit. JS MVC Summary (2)----angular and Knockout o99 best practices1. Frame Angular and knockout 12.2. Simple List binding: Knockout 13. Foreach binding 34. Sumup:hesh Angular Simply 31. MVC Benefits Angular features include 32.2.1 Data binding is the MVVM structure, 33.2.

corresponding use.And the interface of our backstage can only receive urlencoded format, JSON is not received.This kind of thing is naturally the front-end way, very simple, all turn into the jquery format to be OK.Specifically, for JS, add two sentences:1. Change format config (function ($httpProvider) { $httpProvider. defaults.headers.post[' content-type '] = ' application/x-www-form-urlencoded;charset=utf-8 ';})2. Serialization work is relative

; defined at module loadtime selector: ' Contacts-header ' , ' Header.component.html ', styleurls: [' Header.component.css ']}) Export class Headercomponent Implements OnInit {}JSPM://If We decide to use JSPM, we use the Typescriptoptions configuration format in the Config.js file:Systemjs.config ({typescriptoptions: {module:"Commonjs", Emitdecoratormetadata:true, Experimentaldecorators:true}, Transpiler:false, BaseURL:"/dist", Map: {app:' SRC ', Typescript:' Node_modules/typescript/lib/types

(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 behavi

What's a module in AngularJS?A module is a container for different parts of your application i.e controllers,services,directives,filters,etc.You can think the A module as a Main () method in the other types of applications.How to create a module?Use the Angular object's module () method to create a module.var myApp = Angular.module ("MyModule", []); //What's a controller in angular?In

button.Html:DropdownElseHereJs:varTimeoutapp = Angular.module (' Timeoutapp '), []); Timeoutapp.controller (' Myctrl ',function($scope) {$scope. Ifshowmenu=false;}); Timeoutapp.directive (' Dropdown ',function($timeout) {return{restrict:"EA", Link:function(scope,iele,iattr) {Scope.showmenu=function() {$timeout. Cancel (SCOPE.T2); Scope.t1= $timeout (function() {Scope.ifshowmenu=true },500) }; Scope.hidemenu=function() {$timeout. Cancel (SCOPE.T1); Scope.t2= $timeout (f

Label:When you want to access child component's method, you can use @ViewChild in the parent: Parent Component: Import {Component, OnInit, Viewchild} from 'Angular2/core'; import {heroservice, Hero} from './heroservice'; import {Observable} from 'Rxjs/rx'; import {Selectedhero} from './selected-hero'; import {Heroitem} from './hero-item'; @Component ({selector:'hero-list', directives: [Selectedhero, Heroitem], Template: '"Removeselectedhero ()">clear"#hero of heros | async"> "Hero"(changed) ="T