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update(@nestjs) add techniques chapter
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,39 +1,50 @@ | ||
| import { | ||
| Directive, ElementRef, AfterViewChecked, | ||
| Input, HostListener, Renderer2, NgZone | ||
| Directive, | ||
| ElementRef, | ||
| AfterViewChecked, | ||
| Input, | ||
| HostListener, | ||
| Renderer2, | ||
| NgZone, | ||
| } from '@angular/core'; | ||
|
|
||
| @Directive({ | ||
| selector: '[matchHeight]' | ||
| selector: '[matchHeight]', | ||
| }) | ||
| export class MatchHeightDirective implements AfterViewChecked { | ||
| constructor( | ||
| private readonly zone: NgZone, | ||
| private readonly renderer: Renderer2, | ||
| private readonly el: ElementRef) {} | ||
| constructor( | ||
| private readonly zone: NgZone, | ||
| private readonly renderer: Renderer2, | ||
| private readonly el: ElementRef, | ||
| ) {} | ||
|
|
||
| ngAfterViewChecked() { | ||
| setTimeout(() => this.zone.run(() => this.matchHeight(this.el.nativeElement)), 800); | ||
| } | ||
|
|
||
| @HostListener('window:resize') | ||
| onResize() { | ||
| setTimeout(() => this.matchHeight(this.el.nativeElement), 500); | ||
| } | ||
| ngAfterViewChecked() { | ||
| setTimeout( | ||
| () => this.zone.run(() => this.matchHeight(this.el.nativeElement)), | ||
| 800, | ||
| ); | ||
| } | ||
|
|
||
| matchHeight(parent: HTMLElement) { | ||
| if (!parent) { | ||
| return; | ||
| } | ||
| const children = Array.from(parent.children); | ||
| children.forEach((x: HTMLElement) => { | ||
| this.renderer.setStyle(x, 'height', 'initial'); | ||
| }); | ||
| const itemHeights = children.map(x => x.getBoundingClientRect().height); | ||
| const maxHeight = itemHeights.reduce((prev, curr) => { | ||
| return curr > prev ? curr : prev; | ||
| }, 0); | ||
| @HostListener('window:resize') | ||
| onResize() { | ||
| setTimeout(() => this.matchHeight(this.el.nativeElement), 500); | ||
| } | ||
|
|
||
| children.forEach((x: HTMLElement) => this.renderer.setStyle(x, 'height', `${maxHeight}px`)); | ||
| matchHeight(parent: HTMLElement) { | ||
| if (!parent) { | ||
| return; | ||
| } | ||
| } | ||
| const children = Array.from(parent.children); | ||
| children.forEach((x: HTMLElement) => { | ||
| this.renderer.setStyle(x, 'height', 'initial'); | ||
| }); | ||
| const itemHeights = children.map(x => x.getBoundingClientRect().height); | ||
| const maxHeight = itemHeights.reduce((prev, curr) => { | ||
| return curr > prev ? curr : prev; | ||
| }, 0); | ||
|
|
||
| children.forEach((x: HTMLElement) => | ||
| this.renderer.setStyle(x, 'height', `${maxHeight}px`), | ||
| ); | ||
| } | ||
| } |
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