angular - 显示或隐藏div鼠标悬停按钮

Question

我有一个小角度项目，在DB中执行搜索操作后显示汽车列表。我想创建一种情况，每当用户使用鼠标在div（<div class="about">）上时，按钮（<button class="call">）正在显示，并且每当用户离开div的区域时，相同的按钮隐藏。

知道我该怎么办？如果可以，当用户使用移动设备时，我该如何做类似的事情？

该列表是从db中的搜索动态创建的，因此我不能使用CSS id来显示或隐藏它。

<a class="result_row_item" *ngFor="let item of cars; let i = index">
    <div class="about">
        <div class="mark">
            <b>{{item.manufacturerName}}</b>
        </div>
        <div class="descr">
            <span class="safety_mark">safety mark -<b> {{item.safetyMark}}  </b></span>
            <span class="zaro_to">0-100 <b> {{item.zeroTo100}} </b></span>
        </div>
        <div class="bottom_nav">
            <button class="call" (click)='triggerModalInfo(item.submodelId)'>more info</button>
        </div>
    </div>
    <div class="img_container" (click)='triggerModal(item.submodelId)' [ngStyle]="{'background-image': 'url('+ this.env.baseCarsUrl + '/images/cars/'+(item.modelThumbnail | lowercase)+ '/main.jpg'+')'}">
    </div>
    <div class="num">{{i+1}}</div>
</a>

Answer 1

有一个名为mouseenter和mouseleave的事件，你可以尝试这样做

所以你可以尝试这样

HTML：

  <a class="result_row_item" *ngFor="let item of cars; let i = index">
<div class="about" (mouseenter)="mouseEnter('true') (mouseleave)="mouseLeave('false')">
    <div class="mark">
        <b>{{item.manufacturerName}}</b>
    </div>
    <div class="descr">
        <span class="safety_mark">safety mark -<b> {{item.safetyMark}}  </b></span>
        <span class="zaro_to">0-100 <b> {{item.zeroTo100}} </b></span>
    </div>
    <div class="bottom_nav" *ngIf="isDisplay">
        <button class="call" (click)='triggerModalInfo(item.submodelId)'>more info</button>
    </div>
</div>
<div class="img_container" (click)='triggerModal(item.submodelId)' [ngStyle]="{'background-image': 'url('+ this.env.baseCarsUrl + '/images/cars/'+(item.modelThumbnail | lowercase)+ '/main.jpg'+')'}">
</div>
<div class="num">{{i+1}}</div>

零件：

   export class component1Component{
     mouseEnter(data : any){
        this.isDisplay= data;
     }

     mouseLeave(data : any){
        this.isDisplay = data;
     }
   }

我希望它可以帮助你

Answer 2

您可以通过使用鼠标事件来实现此目的，

在您的模板中

<a class="result_row_item" *ngFor="let item of cars; let i = index">
    <div class="about" (mouseenter)="showElement=!showElement" (mouseleave)="showElement=!showElement">
        <div class="mark">
            <b>{{item.manufacturerName}}</b>
        </div>
        <div class="descr">
            <span class="safety_mark">safety mark -<b> {{item.safetyMark}}  </b></span>
            <span class="zaro_to">0-100 <b> {{item.zeroTo100}} </b></span>
        </div>
        <div class="bottom_nav" *ngIf="showElement">
            <button class="call" (click)='triggerModalInfo(item.submodelId)'>more info</button>
        </div>
    </div>
    <div class="img_container" (click)='triggerModal(item.submodelId)' [ngStyle]="{'background-image': 'url('+ this.env.baseCarsUrl + '/images/cars/'+(item.modelThumbnail | lowercase)+ '/main.jpg'+')'}">
    </div>
    <div class="num">{{i+1}}</div>
</a>

在您的组件中，

showElement: boolean = true;