Angular4 responsive form add validation

this.invoiceForm = this.formBulider.group(new Invoice());

how do I add validator Validators? if I create a form in this way

Mar.09,2021

one way:

this.invoiceForm = this.formBuilder.group({
    control1: new FormControl('',[Validators.required,...]),
    control2: new FormControl('',[Validators.required,...])
})
The

Invoice object should contain multiple FormControl attributes.

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