angular - How to check is checkbox is checked angular2

Question

I want to check is checkbox is checked or unchecked in an if and else statement.

<md-checkbox id="mon" (change)="mon($event)" [checked]="true">Checked</md-checkbox>



mon(e){
    if(e.target.checked){
      console.log("This is checked")
    } else {
      console.log("unchecked");
    }
  }

I think I am doing it really wrong. I keep getting can't get checked of undefined. How is the way to do this?

Answer 1

declare a variable called it filter

filter: boolean= false;

then use ngModel in html part to access and assign its value.

<input type="checkbox" [(ngModel)]="filter" (click)="filterData()">

it will call a function filterData() which you can use to do all your functionality

filter(){
  this.filter = !this.filter;// this will change value of it true and false 
}

for more checkbox you can use declare more variable like filter1: boolean