Reactive forms validation error

[Sailesh]

I have a reactive forms. I am trying to validate a username as required. So, I am using form.get(‘username’).touched property. However compiler throws an error. Can someone help please? I am new to Angular.

[husain.asfak]

Perhaps it can help you

typescript file

[husain.asfak]

Html file

[smahmoodi]

change the syntax needs to be like this

it works for me.