使用angular2上的按钮进行水平滚动

Question

所以我在angular2中有这个应用程序,我需要水平滚动组件,但左右按钮.所以我需要一个功能,每个按钮滚动到右边或左边的内容.我需要这样的东西:

我尝试过使用document.getElementById('myscrolldiv').animate({ scrollLeft: "-=" + 250 + "px"; }但是Angular无法识别该animate行.

所以我正在寻找一种使用按钮水平滚动但不使用jquery的不同方法.有角度吗？

这是我的HTML

<div class="container">
  <div class="side">
    <mat-icon (click)="scrollLeft()">keyboard_arrow_left</mat-icon>
  </div>
  <div id="widgetsContent" class="middle">
    <div class="scrolls">
      <div class="info-widget">
         WIDGET
      </div>
      <div class="info-widget">
         WIDGET
      </div>
      <div class="info-widget">
         WIDGET
      </div>
      <div class="info-widget">
         WIDGET
      </div>
      <div class="info-widget">
         WIDGET
      </div>
      <div class="info-widget">
         WIDGET
      </div>
    </div>
  </div>
  <div class="side">
    <mat-icon (click)="scrollRight()">keyboard_arrow_right</mat-icon>
  </div>
</div>

这是我的CSS

.container {
  display: flex;
  height: 22.5vh !important;
}

.side {
  width: 50px;
  height: 22.5vh !important;
}

.middle {
  flex-grow: 1;
  height: 22.5vh !important;
  overflow-x: scroll;
  overflow-y: hidden;
  white-space: nowrap;
}

那么,如何左右滚动按钮呢？请帮忙.

Answer 1

导入ViewChild和ElementRef以获取elemenet参考.

使用#localvariable,如下所示, <div #widgetsContent class="middle">

获取组件中的元素, @ViewChild('widgetsContent', { read: ElementRef }) public widgetsContent: ElementRef<any>;

改变滚动值, this.widgetsContent.nativeElement.scrollTo({ left: (this.widgetsContent.nativeElement.scrollLeft + 150), behavior: 'smooth' });

一个例子如下所示

import { Component, OnInit, ViewChild, ElementRef } from "@angular/core";

@Component({
    selector: 'my-app',
    template: `
                <div class="container">
                <div style="float: left">
                    <button (click)="scrollLeft()">left</button>
                </div>

                <div #widgetsContent class="middle">
                    <div class="info-widget">
                    WIDGET
                    </div>
                    <div class="info-widget">
                    WIDGET
                    </div>
                    <div class="info-widget">
                    WIDGET
                    </div>
                    <div class="info-widget">
                    WIDGET
                    </div>
                    <div class="info-widget">
                    WIDGET
                    </div>
                    <div class="info-widget">
                    WIDGET
                    </div>
                </div>

                <div style="float: right">
                    <button (click)="scrollRight()">right</button>
                </div>
                </div>
            `,
    styles: [`
      .info-widget {
        width: 31.75%;
        border: 1px solid black;
        display: inline-block;
      }

      .middle {
        float: left;
        width: 90%;
        overflow: auto;
        /*will change this to hidden later to deny scolling to user*/
        white-space: nowrap;
      }
            `]
})

export class AppComponent { 

  @ViewChild('widgetsContent', { read: ElementRef }) public widgetsContent: ElementRef<any>;

  public scrollRight(): void {
    this.widgetsContent.nativeElement.scrollTo({ left: (this.widgetsContent.nativeElement.scrollLeft + 150), behavior: 'smooth' });
  }

  public scrollLeft(): void {
    this.widgetsContent.nativeElement.scrollTo({ left: (this.widgetsContent.nativeElement.scrollLeft - 150), behavior: 'smooth' });
  }
}

Answer 2

考虑以下解决方案

在 .html 中

<div #widgetsContent class="custom-slider-main">
    <div class="info-widget">
         WIDGET
      </div>
      <div class="info-widget">
         WIDGET
      </div>
      <div class="info-widget">
         WIDGET
      </div>
      <div class="info-widget">
         WIDGET
      </div>
      <div class="info-widget">
         WIDGET
      </div>
      <div class="info-widget">
         WIDGET
      </div>
</div>

在.scss中

.custom-slider-main{
    display: flex;
    overflow: hidden;    
    scroll-behavior: smooth;
}

在 .ts 中

@ViewChild('widgetsContent') widgetsContent: ElementRef;

单击左/右按钮可使用以下功能

scrollLeft(){
    this.widgetsContent.nativeElement.scrollLeft -= 150;
  }

  scrollRight(){
    this.widgetsContent.nativeElement.scrollLeft += 150;
  }