5
我已經能夠升級angularjs元件指令在角4. 可以使用這裏的一個示例代碼:是否可以升級angularjs atttribute指令以在角度4中使用?
[myScores.js]
angular.module('app.components.directives.myScores', [])
.directive('myScores', function() {
return {
scope: {
score: '=',
},
template: '<div>>>> Your score is {{score}} <<<',
link: function(scope) {
console.log("in myScores", scope)
}
};
});
[myScores.ts]
import { Directive, ElementRef, Injector, Input, Output, EventEmitter } from '@angular/core';
import { UpgradeComponent } from '@angular/upgrade/static';
@Directive({
selector: 'my-scores'
})
export class MyScoresDirective extends UpgradeComponent {
@Input() score: number;
constructor(elementRef: ElementRef, injector: Injector) {
super('myScores', elementRef, injector);
}
}
注意我正在使用UpgradeComponent升級myScores元素指令。 我試過同樣的屬性指令,但出現錯誤。有沒有辦法升級一個屬性指令?
這裏是我的升級屬性指令的嘗試:
[makeGreen.js]
angular.module('app.components.directives.makeGreen', [])
.directive('makeGreen', function() {
return {
restrict: 'A',
link: function(scope, element) {
console.log("in makeGreen", scope)
console.log("element", element)
element.css('color', 'green');
}
};
});
[makeGreen.ts]
import { Directive, ElementRef, Injector, Input, Output, EventEmitter } from '@angular/core';
import { UpgradeComponent } from '@angular/upgrade/static';
@Directive({
selector: '[makeGreen]'
})
export class MakeGreenDirective extends UpgradeComponent {
@Input() count: number;
@Output() clicked: EventEmitter<number>;
constructor(elementRef: ElementRef, injector: Injector) {
console.log("elementRef", elementRef.nativeElement)
super('makeGreen', elementRef, injector);
}
}
我得到一個錯誤時,加載一個類似這樣的頁面:
<div makeGreen>Text should be green</div>
我得到這個錯誤:
Error: Directive 'makeGreen' is not a component, it is missing template.