Disable Button in Angular 2

Question

I want if the input \'Contract type\' is empty, the button \'Save\' is not clickable

Save button:

Answer 1

I tried use [disabled]="!editmode" but it not work in my case.

This is my solution [disabled]="!editmode ? 'disabled': null" , I share for whom concern.

            
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Stackbliz https://stackblitz.com/edit/angular-af55ep