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.

Ch         


        

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

Answer 2

We can look at source code of material checkbox:

event.source = this;
event.checked = this.checked;

this._controlValueAccessorChangeFn(this.checked);
this.change.emit(event);

https://github.com/angular/material2/blob/2.0.0-alpha.11/src/lib/checkbox/checkbox.ts#L288-L292

So you can do it like:

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