[英]Angular: How to get ElementRef From Custom Decorator
I'm implementing decorator for Host CSS Variable Binding in Angular5. 我正在Angular5中实现Host CSS变量绑定的装饰器。 However, I can't implement it well as following code.
但是,我不能很好地实现以下代码。 Can I define ElementRef from decorator?
我可以从装饰器定义ElementRef吗?
export function HostCssVariable(cssVariableName?: string): any {
return (target, propertyKey: string, descriptor: PropertyDescriptor) => {
let _value: any;
return {
set: function(value) {
// this.el is defined by TestComponent's constructor
// Can I define ElementRef in decorator?
this.el.nativeElement.style.setProperty(`--${cssVariableName}`, value);
_value = value;
},
get: function() {
return this.el.nativeElement.style.getProperty ?
this.el.nativeElement.style.getProperty(`--${cssVariableName}`): _value
},
enumerable: true,
configurable: true,
}
}
}
@Component({
selector: 'test-component',
templateUrl: ...,
styleUrls: [...]
})
export class TestComponent {
@HostCssVariable('hoge')
public hoge: number = 2;
constructor(private el: ElementRef) { }
}
thanks. 谢谢。
我认为没有办法将组件的ElementRef注入到您的自定义装饰器中,因为您的装饰器是属性装饰器,而不是类装饰器。
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