ngif angular2

can build a disk constructor, which completes the data additions and deletions to check and verify operations, with Disk-related controller, injected into the disk constructor and generate an example, this example has the ability to add and delete changes to check and verify the method. This is both hierarchical and realized reuse (make the controller layer thinner). The further practice of reference Angularjs in the Suningyun Center Which routing libraries are commonly used in angular applic

1. Http Cross-domain Unable to access across domains using HTTP, error: "No ' Access-control-allow-origin ' header is present on the requested resource" The workaround can be added to the server side by adding the Access-control-allow-origin header to the response; Either use JSONP, or do a reverse proxy on the server side. 2. Background update array, ngfor no update view Using Ngzone to update the array, refer to: https://stackoverflow.com/questions/31706948/

Angular 2 Form form In the Angular2 form form we need to understand the form data binding, data validation, data submission and so on, in the following example is not actually submitted to the background, this part of the content in the future Webapi to practice. Form Creation Here is an empty form Ngsubmit is an event for submitting data, the data is the content of the entire form form, and usually our form is bound to one of our model, then the s

Angular 2 Form formIn the Angular2 form form we need to understand the form data binding, data validation, data submission and so on, in the following example is not actually submitted to the background, this part of the content in the future Webapi to practice.Form creationHere is an empty form Ngsubmit is an event for submitting data, the data is the content of the entire form form, and usually our form is bound to one of our model, then the submitt

What is the service in ANGLAR2?If there is a piece of code in the project that many components use, the best way is to make it a service.A service is a mechanism for sharing functionality in a component, and when we use tags to combine multiple components together we need to manipulate some data or we need to do some arithmetic, we need to do a service, the service can help us to introduce external data. So how do you create a service?Create a serviceCreate a simple serviceImport {injectable} fr

Springbootangular2 integration example Background The framework started with spring boot as tomcat, the framework of angular2 as the front-end page, and the code of angular2 needs to be run in the built-in tomcat of spring boot. Project Structure src/main/--------angular--------java--------resourcespom.xml The angular directory is a new project created using angular cli, And the springboot startup code in j

Recently self-taught Ionic2, wrote an embedded Baidu Map JS demo, actually ran up after the common white screen problem.The initial implementation is this:First the homepage embedded a Baidu map pluginA guided sub-page in menu is also embedded with a Baidu mapThen ionic serve compile execution, the main page appears normal, and the child page pops up when white screen:Because the essence of Ionic2 is a single-page app based on Angular2, the initial co

Ionic2 uses an approximate native app-style page navigation, and does not support ANGULAR2 routing. This is a convenient way to develop a native app, but if you're going to have a problem developing a web-only page, ANGULAR2 's router can provide a more flexible configuration. For example, in the case of the homepage is a tabs page, how to control the user to see the first tab? By default, the first tab is

higher level of scope (for example, $rootscope), you need to pass the event up.Use $on for event snooping on the scope.ExampleJavascript1App.controller (' Parentcontroller ',function($scope) {2$scope. $on (' $fromSubControllerClick ',function(e,data) {3Console.log (data);//Hello4 });5 });6 7App.controller (' Childcontroller ',function($scope) {8$scope. SayHello =function() {9$scope. $emit (' $fromSubControllerClick ', ' Hello ');Ten }; One }); A - //HTML - the - - -

Angular 2 Templates Use a special the Async pipe to being able to render out observables. This lesson covers the syntax used to create a Observable in Angular 2 and then to render it out in the template.Import {Component} from 'Angular2/core'; import {bootstrap} from 'Angular2/platform/browser'; import {Observable} from 'rxjs/observable'; Import'Rxjs/add/observable/interval'@Component ({selector:'app', Temp

) { returnState ; }Else{ return{... state, completed:!state.completed//Would overwirte the State object ' s completed prop }; } default: returnState ; }}let Todos= (state = [], action) = = { Switch(action.type) { Case' Add_item ': returnState =[... state, Todo (undefined, action)]; Case' Toggle_item ': returnState.map ((t) =Todo (T, action))default: returnState ; }};let Testtodo_additem= () + ={Let Statebefore= []; Let action={type:' Add_ite

AngularJS2 integrates with D3.js to implement custom visualization. angularjs2d3. js This article describes how ANGULAR2 integrates with D3.js to implement custom visualization: Target Separation of presentation layer and logic layer Data and visualization components separated Two-way binding of data and views, real-time update Clear code structure, easy to maintain and modify Basic Principles Angular2