使用directives來更改html物件的css樣式
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| <p newStyle>Style me with directive</p>
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新增typescript檔案來定義directives
- 直接更改DOM(不建議):
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| export NewStyleDirective implements OnInit { constructor(private elementRef: ElementRef) {}
ngOnInit() { this.elementRef.nativeElement.style.backgroundColor = 'yellow'; } }
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- 不直接更改DOM(建議做法):
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| export NewStyleDirective implements OnInit { constructor(private elementRef: ElementRef, private renderer: Renderer2) {}
ngOnInit() { this.renderer.setStyle(this.elementRef.nativeElement, 'background-color', 'yellow'); } }
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