It is important to validate the form submitted by the user because it can have inappropriate values. So, validation is must to authenticate user.
In this example, we are going to validate the name and password. The name can’t be empty and password can’t be less than 6 characters long.
Here, we are validating the form on form submit. The user will not be forwarded to the next page until given values are correct.Test it Now
Let's validate the textfield for numeric value only. Here, we are using isNaN() function.Test it Now
There are many criteria that need to be follow to validate the email id such as:
Let's see the simple example to validate the email field.Test it Now