Angular 5 Pass data on click event from parent component to child component on button clicked at parent component

Question

i have some data bind in table and on click of any specific i want to show current clicked object more related data in to another component(child component)

for example the data I'm taking from this link: http://jsonplaceholder.typicode.com/users

HTML Code:

<table>
  <thead>
    <th>
      Id
    </th>
    <th>
      name
    </th>
    <th>
      username
    </th>
    <th>
      email
    </th>
    <th>
      street
    </th>
    <th>
      suite
    </th>
    <th>
      zipcode
    </th>
    <th>
      phone
    </th>
    <th>
      website
    </th>
    </thead>
  <tbody>
    <tr *ngFor="let data of httpdata"> 
      <td>{{data.id}}
      </td> 
      <td>{{data.name}}
      </td> 
      <td>{{data.username}}
      </td> 
      <td>{{data.email}}
      </td> 
      <td>{{data.address.street}}
      </td> 
      <td>{{data.address.city}}
      </td> 
      <td>{{data.address.suite}}
      </td> 
      <td>{{data.address.zipcode}}
      </td> 
      <td>{{data.phone}}
      </td> 
      <td>{{data.website}}
      </td> 
      <td>
        <a routerLink="/conflict-details/conflict" (click)="onSelect(data)">Go to 
        </a> 
      </td> 
    </tr>
  </tbody>
</table>

if you see there is one go to button i have in table when i click on any specific data it should show me complete info about current clicked but in my case i want to bind the data in another component when i click on go to for specific that all td data should be display in new component(child).

simple i want to track click event for selected data in child component . and the table is rendered in parent component.

attached is the data table I have.

Answer 1

You can use the @Input and @Output decorator to achieve the required output:

Changes:

In parent Component:

HTML Code:

<div>
  <table *ngIf="isVisible === true">
    <tr>
      <th>
        Id
      </th>
      <th>
        name
      </th>
      <th>
        username
      </th>
      <th>
        email
      </th>
    </tr>
    <tr *ngFor="let data of userInformation">
      <td>{{data.id}}
      </td>
      <td>{{data.name}}
      </td>
      <td>{{data.username}}
      </td>
      <td>{{data.email}}
      </td>
      <td>
        <a (click)="onSelect(data)">Go to
        </a>
      </td>
    </tr>
  </table>

  <div *ngIf="isVisible === false">
    <app-test-child [userInfo]="clickedUser" (notify)="backToList($event)"></app-test-child>
  </div>
</div>

TS Code:

Local variables:

userInformation: any;
isVisible : boolean = true;
clickedUser: any;

Two functions in the parent component:

onSelect(data)
{
   this.isVisible = false;
   this.clickedUser = data;
}

backToList(flag) {
  this.isVisible = flag;
  console.log(flag)
}

In Child Component:

HTML code:

<table>
  <tr>
    <th>
      Id
    </th>
    <th>
      name
    </th>
    <th>
      username
    </th>
    <th>
      email
    </th>
  </tr>
  <tr>
    <td>{{clickedUser.id}}
    </td>
    <td>{{clickedUser.name}}
    </td>
    <td>{{clickedUser.username}}
    </td>
    <td>{{clickedUser.email}}
    </td>
    <td>
      <a (click)="backToList()">Back
      </a>
    </td>
  </tr>
</table>

TS Code:

import { Component, OnInit, Input, EventEmitter, Output } from '@angular/core';


@Input() userInfo: any;
@Output() notify: EventEmitter<any> = new EventEmitter<any>();

clickedUser: any;

constructor() { }

ngOnInit() {
  this.clickedUser = this.userInfo;
}

backToList() {
  var flag = true;
  this.notify.emit(flag);
}