angular6

问题 In the ng-bootstrap modal documentation there are uses of some kind of let-* attribute that seemed to be used to link a function or event for later use. If you look at the (click) events and the let-c / let-d attributes at the top of the examples, you can get a feel for what it does. This appears to be a feature of Angular and has nothing to do with ng-bootstrap . But what is this called? What does it do? Where are the Angular docs for this feature? Here's an example of what I'm referring to.

问题 In angularJS, you could use $compile to render a view in an iframe as well as keep the angularjs $scope variables within the iframe. Is there an equivalent functionality in Angular.IO? AngularJS equivalent in a directive: var $body = angular.element($element[0].contentDocument.body); var template = $compile(contents)($scope); $body.append(template); I would like to render an iframe, pass the necessary html to populate the iframe and be able to use the template language inside the iframe html.

问题 Has anyone faced below warning in "ng serve"? WARNING in ./node_modules/@angular/compiler/src/util.js 10:24-31 Critical dependency: require function is used in a way in which dependencies cannot be statically extracted ℹ ｢wdm｣: Compiled with warnings. Angular versioning: Angular CLI: 6.0.8 Node: 8.11.3 OS: darwin x64 Angular: 6.0.9 ... animations, common, compiler, compiler-cli, core, forms ... http, language-service, platform-browser ... platform-browser-dynamic, router, upgrade I tried

问题 I am learning angular and i got confuse in these observable, observer and subscribe thing. So please explain. 回答1: Here is a simple visual to see the difference: As seen above ... an Observable is a stream of events or data. They are often returned from Angular methods, such as the http.get and the myinputBox.valueChanges . Subscribing "kicks off" the observable stream. Without a subscribe (or an async pipe) the stream won't start emitting values. It's similar to subscribing to a newspaper or

问题 I am learning angular and i got confuse in these observable, observer and subscribe thing. So please explain. 回答1: Here is a simple visual to see the difference: As seen above ... an Observable is a stream of events or data. They are often returned from Angular methods, such as the http.get and the myinputBox.valueChanges . Subscribing "kicks off" the observable stream. Without a subscribe (or an async pipe) the stream won't start emitting values. It's similar to subscribing to a newspaper or

问题 How can i write test case for service in my HomeComponent.spec.ts file. And for proceed button postRequest method called from the home.service.ts file. i have tried out but it's not working. kindly help me out. home.service.ts import { Injectable } from '@angular/core'; import { API_ACTIONS } from 'src/app/global/constant/common-constant'; import { CommonService } from 'src/app/global/services/common.service'; import { environment } from 'src/environments/environment'; @Injectable() export

问题 How can i write test case for service in my HomeComponent.spec.ts file. And for proceed button postRequest method called from the home.service.ts file. i have tried out but it's not working. kindly help me out. home.service.ts import { Injectable } from '@angular/core'; import { API_ACTIONS } from 'src/app/global/constant/common-constant'; import { CommonService } from 'src/app/global/services/common.service'; import { environment } from 'src/environments/environment'; @Injectable() export

问题 I am using ag-grid with angular 6. For a particular column the cell is supposed to be editable. Please find the below image. How can i add this icon, on click of which the cell is made editable. 回答1: You need to use the cellRenderer field in the objects that are in the columnDefs array. Basically, you take what would normally be displayed, and the icon you want to display and place them both in one <span> . something.component.ts columnDefs = [ /* ... */ { headerName: 'Notes', field: 'notes',

问题 I have difficulties using the power of Observables i.e. RxJs 6 to correctly pipe, tap, map, mergemap or whatever my HttpClient requests. The version hell with all the different functions makes it not very easy... So what I need is to first make a REST call, then depending on the result probably do a second REST call and map the potentially two received data objects in one new data object. The function should return an Observable . So currently, I solved it with a subject that I am be able to

问题 I have difficulties using the power of Observables i.e. RxJs 6 to correctly pipe, tap, map, mergemap or whatever my HttpClient requests. The version hell with all the different functions makes it not very easy... So what I need is to first make a REST call, then depending on the result probably do a second REST call and map the potentially two received data objects in one new data object. The function should return an Observable . So currently, I solved it with a subject that I am be able to