CODEWITHSUNDEEP
javascriptjqueryangularangular-directiveangular-ngfor
lakhan
lakhan

Reputation: 265

Hide/show individual or specific button inside ngFor

I am new to angular. I am iterating through an array of objects. I have declared two buttons that is Start & End. I want to display the start initially for each item. when user click on Start button of an item that item's start button should hide & End button should display.

 startTask(id) {
    console.log('item id',id)
  }

  EndTask(index) {
    console.log('item id',id)
  }
<div class="row no-gutters">
  <div class="card width hr" *ngFor="let item of allUserTaskArr">
    <div class="card-header">
      {{item.due | date}}
    </div>
    <div class="card-body pad-125">
      <div class="row no-gutters">
        <div class="col-md-12">
          {{item.name}}
          <div class="float-right">
            <button class="btn btn-info mar-l-r-0-5" (click)="startTask(item.id)">Start</button>
            <button class="btn btn-danger mar-l-r-0-5" (click)="EndTask(item.id)">End</button>
          </div>
        </div>
      </div>
    </div>
  </div>
</div>

In the above example, each item has a unique ID. for each item there is one start & end button. I want to display the start button initially for all & when I click on the Start button of an item only that button should replace with End button. all others should remain the same.

[![ngFor items image]]: https://i.sstatic.net/9pvLE.png

Upvotes: 0

Views: 2042

Answers (1)

Imon
Imon

Reputation: 659

first you need extra property like button of that array

.ts file

allUserTaskArr = [
    {
      'name': 'abc',
      'id':1,
      'button': 'start',
    },
     {
      'name': 'xyz',
      'id':1,
      'button': 'end',
    }
  ];
 public startTask (item) {
   item.button =  'end';
 }

 public endTask (item) {
   item.button =  'start';
 }

and .html file is

<div class="card width hr" *ngFor="let item of allUserTaskArr">
    <div class="card-header">
      {{item.due | date}}
    </div>
    <div class="card-body pad-125">
      <div class="row no-gutters">
        <div class="col-md-12">
          {{item.name}}
          <div class="float-right">
            <button class="btn btn-info mar-l-r-0-5" *ngIf="item.button =='start'" (click)="startTask(item)">Start</button>
            <button  (click)="endTask(item)" class="btn btn-danger mar-l-r-0-5" *ngIf="item.button =='end'">End</button>
          </div>
        </div>
      </div>
    </div>
  </div>

another way Button change by index .html file

 <div class="card width hr" *ngFor="let item of allUserTaskArr; let i = index">
    <div class="card-header">
      {{item.due | date}}
    </div>
    <div class="card-body pad-125">
      <div class="row no-gutters">
        <div class="col-md-12">
          {{item.name}}
          <div class="float-right">
            <button class="btn btn-info mar-l-r-0-5" *ngIf="item.button =='start'" (click)="startTask(item, i)">Start</button>
            <button  (click)="endTask(item, i)" class="btn btn-danger mar-l-r-0-5" *ngIf="item.button =='end'">End</button>
          </div>
        </div>
      </div>
    </div>
  </div>

.ts file

 allUserTaskArr = [
    {
      'name': 'abc',
      'id':1,
      'button': 'start',
    },
     {
      'name': 'xyz',
      'id':1,
      'button': 'end',
    }
  ];
 public startTask (item, index) {
   this.allUserTaskArr[index].button = 'end';
 }

 public endTask (item, index) {
   this.allUserTaskArr[index].button =  'start';
 }

Upvotes: 1

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