问题
I am trying to upgrade my AngularJS directive to Angular Component.
Here is the code of directive:
ng1AppModule.component('ng1Tmp', {
bindings: {p: '<'},
require: {ngModel: 'ngModel'}
});
And I tried to upgrade it by:
@Directive({selector: 'ng1-tmp'})
class Ng1HTmpComponent extends UpgradeComponent{
@Input() p: string;
@Input() ngModel: INgModelController;
constrcutor(elementRef: ElementRef, injector: Injector) {
super('ng1Tmp', elementRef, injector);
}
}
It doesn't work well. It seems not to support ngModel to upgrade in this way. But I don't see any related information in this documentation: https://angular.io/guide/upgrade .
Does anyone have some ideas on this?
Thanks in advance. :)
回答1:
Angular not mean new version of AngularJS, them are different struct. 3 point must known before code one component: Input, Output and EventEmitter.
One example Directive/Component here may can some help.
//AngularJS directive, use it like <pagination></pagination>
app.register.directive('pagination', function () {
return {
restrict : 'E',
scope : true,
templateUrl : '/views/widgets/pagination.html',
controllerAs : 'vm',
controller : PaginationController
};
PaginationController.$inject = ['$scope'];
function PaginationController($scope) {
}
});
And now I was redefined it on Angular.
//Angular6 Component, use it like
//<app-pagination [pager]="pagination" (fired)="onFire($event)"></app-pagination>
import { Component, OnInit, EventEmitter, Input, Output } from '@angular/core';
@Component({
selector: 'app-pagination',
templateUrl: './pagination.component.html',
styleUrls: ['./pagination.component.scss']
})
export class PaginationComponent implements OnInit {
@Input() pager: any;
@Output() fired = new EventEmitter<any>();
constructor() { }
ngOnInit() {
}
prev() {
let page = this.pager.current_page - 1;
if (page < 0) page = 1;
this.fired.emit({type: 'page', data: page});
}
next() {
let page = this.pager.current_page + 1;
if (page > this.pager.page_count) page = this.pager.page_count;
this.fired.emit({type: 'page', data: page});
}
}
And at parent Component or Page, should be listen the event, like:
onFire(event) {
switch (event.type) {
case 'page': //pagination component fire
return this.gotoPage(event.data);
case 'edit': //list item fire
return this.editArticle(event.data);
case 'view': //list item fire
return this.viewArticle(event.data);
case 'trash': //list item fire
return this.trashArticle(event.data);
}
}
来源:https://stackoverflow.com/questions/53291462/upgrade-angularjs-directive-with-ngmodel-to-angular-component