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in the previous lectures we have learned how to add a validation on a form control using angulars built-in validators now in this lecture we are going to learn how to create our own custom validators and how to use it on a form control we will also learn what is an error code for a validator and how we can use that error code in our app for our own use every validator has an error code and an error code is nothing but a text which is returned by a validator when the validation fails on a form control for example on this first name form control we are using the required validator now let me go ahead and open developer console lets clear everything and lets click on this submit button if i go ahead and expand this form group inside this we have this controls and here we have this personal details form group and inside this personal details form group we again have this controls and we have this first name control so if you notice this first name control has this errors property and th
