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I'm trying to implement select all checkbox on angular material. When user click on specifc checkbox (item), master checkbox should show Indeterminate and turn to checked if all checkboxes are selected. Currently I'm having some weird behaviour. Can anyone let me know where I made mistake? Here is stackblitz. Here is my sample code:

app.html

<fieldset class="demo-fieldset">
  <div>
    <mat-checkbox aria-label="Select All" [checked]="isChecked(selected3, itemsObject)" [indeterminate]="isIndeterminate(selected3, itemsObject)" (click)="toggleAll(selected3, itemsObject)">
      Select All list of user (Array of objects) {{isChecked(selected3, itemsObject)}}
    </mat-checkbox>
  </div>
  <div class="demo-select-all-checkboxes" *ngFor="let item of itemsObject">
    <mat-checkbox [checked]="exists(item, selected3)" (click)="toggle(item, selected3)">
      {{ item.val }}
    </mat-checkbox>
    {{exists(item, selected3)}}

  </div>
</fieldset>

Try this code:

Component:

import {Component} from '@angular/core';
import {

  MatCheckboxChange
} from '@angular/material';

/**
 * @title Configurable checkbox
 */
@Component({
  selector: 'checkbox-configurable-example',
  templateUrl: 'checkbox-configurable-example.html',
  styleUrls: ['checkbox-configurable-example.css'],
})
export class CheckboxConfigurableExample {
  itemsObject = [{
    id: 1,
    val: 'john'
  }, {
    id: 2,
    val: 'jane'
  }];
  selected3 = [];

  toggle(item,event: MatCheckboxChange) {
     if (event.checked) {
      this.selected3.push(item);
    } else {
      const index = this.selected3.indexOf(item);
      if (index >= 0) {
        this.selected3.splice(index, 1);
      }
    }
   console.log(item + "<>", event.checked);
  }

  exists(item) {
    return this.selected3.indexOf(item) > -1;
  };

  isIndeterminate() {
    return (this.selected3.length > 0 && !this.isChecked());
  };

  isChecked() {
    return this.selected3.length === this.itemsObject.length;
  };



  toggleAll(event: MatCheckboxChange) { 

    if ( event.checked ) {

       this.itemsObject.forEach(row => {
          // console.log('checked row', row);
          this.selected3.push(row)
          });

        // console.log('checked here');
    } else {
      // console.log('checked false');
       this.selected3.length = 0 ;
    }
}
}

Template:

<fieldset class="demo-fieldset">
  <div>
     <mat-checkbox aria-label="Select All" [checked]="isChecked()" [indeterminate]="isIndeterminate()" (change)="$event ? toggleAll($event) : null">
      Select All list of user (Array of objects) {{isChecked(selected3)}}
    </mat-checkbox>
  </div>
  <div class="demo-select-all-checkboxes" *ngFor="let item of itemsObject">
    <mat-checkbox (click)="$event.stopPropagation()"
                    (change)="$event ? toggle(item, $event) : null"
                    [checked]="exists(item)">
      {{ item.val }}
    </mat-checkbox>
    {{exists(item)}}

  </div>
</fieldset>

mat-select, Which versions of Angular, Material, OS, TypeScript, browsers are affected I suppose that one checkbox "Select all" on the top would be more  This tutorial is updated and compatible with all Angular versions including 6,7,8 and 9 Select/ Unselect Checkbox List Items in Angular 9 In the app.component.ts file, we will define an object of items using which we will create a list. This object will have an id, value and a boolean to check if the current item is selected or not.


A different strategy might be to bind to values on an object and component, instead of calling methods. This way, you may be able to manage the state more effectively in your component.

For example, you could introduce the following in your object model:

public itemsObject = [{
  id: 1,
  val: 'john',
  isChecked: false
}, {
  id: 2,
  val: 'jane',
  isChecked: false
}];

You can then bind this to the checkboxes using:

[checked]="item.isChecked"

Binding the the "change" event will also let you know when things are changed, and you can then act accordingly:

<mat-checkbox [checked]="item.isChecked" (change)="itemChanged(item,$event)">

I created a Stackblitz which shows a working example:-

https://stackblitz.com/edit/angular-uuw7qh-ninwen

angular-material-select-all, Starter project for Angular apps that exports to the Angular CLI. @Component({​. selector: 'app-select-check-all',. template: `. <mat-checkbox class="mat-option". Refer material angular basics @ Material Angular Io. Refer How to Start Material Angular @ InterfaceCreator. Refer How to Start Angular 6 step by step @ InterfaceCreator. Here we go for the steps to achieve Material multi-Select drop down with select all checkbox (Mat Checkbox). Material Angular Modules Used :


In your checkbox-configurable-example.html you use:

[checked] = "isChecked(selected3, itemsObject)"

I simply changed this to:

value="isChecked(selected3, itemsObject)"

And it looks as you expect? I suspect some more tweaking is needed for the overall project, but this might get you in the direction?

Implement Select All Option for MatSelect in Angular Material , Handle select change event, which will be used for setting the values on the select. select-check-all.component.html: < mat-checkbox  Angular Checkbox Select All Deselect All. Here I am going to discuss about implementing a select all/deselect all checkbox using Angular 2+. I have explained the same using Angular js 1 and Jquery. If you want to compare the implementation please check those as well. Select all/deselect all checkbox using angular


On your Html, Add something like below:

<table class="table">
              <thead>
                <tr>
                  <th>
                    <mat-checkbox (change)="onChangeSelectAll($event)">Select/Deselect All</mat-checkbox>
                  </th>

                </tr>
              </thead>
              <tbody>
                <tr *ngFor="let item of offers">
                  <td>
                    <mat-checkbox [checked]="item.selected" (change)="selection($event, i, item)" name="chkInvoice"></mat-checkbox>
                  </td>                      
                </tr>
              </tbody>
            </table>

ON your typescript file,

onChangeSelectAll(event) {
    if (event.checked) {
        this.offers.forEach(obj => {
            obj.selected = true;
        });
    }
    else {
        this.offers.forEach(obj => {
            obj.selected = false;
        });
    }
}

Select All checkbox Angular material 5, While the indeterminate property of the checkbox is true, it will render as indeterminate regardless of the checked value. Any interaction with the checkbox by a  In this Angular 9 tutorial, we’ll create a Multi checkbox list using the Material UI library’s mat-checkbox component. This checkbox list can be checked and unchecked by clicking a master checkbox which will also display indeterminate state.


Checkbox, This object will have an id, value and a boolean to check if the current item is selected or not. Also, Read Angular Material 8/7 | Check/ Uncheck  To select all and unselect all value from a checkbox list, we used the following approach. The onCheckboxChange () method takes one argument, and this value referred to the checkbox value when a user clicked on it.


Angular 9|8|7 How to Check All/ Uncheck All Checkbox List, <div class="demo-select-all-checkboxes" flex="100" ng-repeat="item in items">. 18. <md-checkbox ng-checked="exists(item, selected)" ng-click="toggle(item,  The <mat-select> also supports all of the form directives from the core FormsModule (NgModel) and ReactiveFormsModule (FormControl, FormGroup, etc.) As with native <select>, <mat-select> also supports a compareWith function. (Additional information about using a custom compareWith function can be found in the Angular forms documentation).


Angular material checkbox select all, Select all/deselect all checkbox using angular. Check below component code, here I have used angular loop concept to loop the value in UI. UI component infrastructure and Material Design components for mobile and desktop Angular web applications.