Using Angular 2 to toggle the visibility of a component when hovering over and moving away from it

I have developed a custom filtering component in Angular 2, which I have integrated into the table header. My goal is to show the filter when the mouse hovers over a specific span, and hide it when the mouse moves away.

<th>
 <span class="headColor" >{{componentContents.dlHead}}</span>
  <app-data-filter [dataObject]="responseData" [filterBy]="'storeCatelogue'"
 (filteredArray)="filterByArray($event,'storeCatelogue')"></app-data-filter>
</th>
 <th >
  <span class="headColor">{{componentContents.titleHead}}</span>
  <app-data-filter [dataObject]="responseData" [filterBy]="'title'" 
  (filteredArray)="filterByArray($event,'title')" ></app-data-filter>
 </th>

However, I want the filter component to only display on hover and disappear when the mouse leaves. It should be specific to each header, displaying one at a time as each header has a different filter. Since I am still learning Angular 2, I am unsure about using host listeners. Any guidance or alternative approach would be greatly appreciated.

Answer №1

If you want to add some style when hovering over an element, you can use the css :hover selector.

Without knowing the specific structure of your html, it's a bit difficult for me to provide exact instructions on how to implement it.

Let's assume that you intend to display a certain element when hovering over a table, and your table has the class 'my-table'.

.my-table:hover{
  th{
    display:none;
    }
}

You can learn more about the :hover selector here.

Additional Information:

If your html structure looks something like this:

<span class='toggle-class'>Toggle visibility!</span>

<div class='toggle-element'></div>

Then your css would be as follows:

.toggle-class:hover + .toggle-element {
display:none;
}

The plus selector selects all elements placed immediately after the specified one.

Additional Update: Per your request, here is a JavaScript-based solution: I advise against this method; rather, any toggle functionality should be managed within your component instead of in your html code.

<span class='toggle-class' (mouseenter)="showElement=true;"
 (mouseleave)="showElement=false;">Toggle visibility!</span>

<div *ngIf="showElement" class='toggle-element'></div>

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