Q: How to make a checkbox checked based on its parent div clicked inside ngFor? I have a list of checkboxes inside ngFor. Each checkbox has its own parent div. I want checkboxes to be checked once the div clicked.
Here is my code.
<div *ngFor="let option of qustions; let i = index" (click)="doCheckboxCheck()">
  <input type="checkbox" [value]="option.value">
  <span>Checkbox {{i}}</span>
</div>


A: You could assign an Angular template reference variable to the <input> element and toggle it's checked property in the <div>'s click or mouseup event.
Now this could modify the default behavior of checkbox's own click event, so you could bind the [checked] toggle to <input> too.
<div 
  class="checkbox-container" 
  *ngFor="let option of questions; let i = index"
  (mouseup)="inputCheckbox.checked = !inputCheckbox.checked"
>
  <input
    #inputCheckbox
    class="checkbox"
    type="checkbox"
    [value]="option.value"
    (mouseup)="inputCheckbox.checked = !inputCheckbox.checked"
  >
  <span>Checkbox {{ option.value }}</span>
</div>

Working example: Stackblitz

A: We can change the state of the checkbox on div click by passing the index to the even handler. Please refer to the link below which is having a working solution,
import { Component } from "@angular/core";

@Component({
  selector: "my-app",
  templateUrl: "./app.component.html",
  styleUrls: ["./app.component.css"]
})
export class AppComponent {
  questions = [
    { value: "Checkbox-1", checked: false },
    { value: "Checkbox-2", checked: false },
    { value: "Checkbox-3", checked: false },
    { value: "Checkbox-4", checked: false },
    { value: "Checkbox-5", checked: false }
  ];

  doCheckboxCheck(index: number): void {
     this.questions[index].checked = !this.questions[index].checked;
  }
}

Template:

<div *ngFor="let option of questions; let i = index" (click)="doCheckboxCheck(i)">
  <input type="checkbox" [value]="option.value" [checked]="option.checked">
  <span>Checkbox {{i}}</span>
</div>


editor url - https://stackblitz.com/edit/checkbox-click?file=src/app/app.component.ts
