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hey hows it going guys my name is dom and today im going to be showing you how easy it is to create your very own customer form validation using javascript right so this solution right here is not going to require any sort of external libraries or frameworks its all going to be done using vanilla javascript and javascript classes all right so this right here is going to be the finished product as we can see we have this validation on this username field right here as well as the preferred language drop down so ill get to the drop down later on but we can see here that it says username cannot contain numbers so if i was to remove the numbers from this username and get out of it we can see the validation is going to go away now as long as there is at least one error message on this form we are unable to submit the form as we can see right down here but as soon as i of course you know make it okay i can now submit the form all right so thats working perfectly fine now um we can see