I am working on stepper, i want to disable next step until all filled should be filled so i made linear to true in html file <mat-horizontal-stepper [linear]="true" #stepper> <mat-step [stepControl]="firstFormGroup"> <form [formGroup]="firstFormGroup"> it's working fine but whenever i am going to next step, "1" becomes "cre" on inspecting i got i didn't user create anywhere in my code it's coming from mat-icon Continue reading...