Validating form input javascript

By default, the browser does not apply a style to these pseudo-classes, so we can define our own.

This way we ensure that our data is clean and meaningful to us and the customer.The name can’t be empty and password can’t be less than 6 characters long. The user will not be forwarded to the next page until given values are correct.When we are setting up CRM Portals to allow customers to update their information, open cases, fill out an applications, etc.For example, we don’t want to show the “required” errors if the user didn’t interact with the form yet.To give feedback to the user if a field is valid or not at a given time, we have to control the state of an input.

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Here’s how it looks: Finally, we map these properties with the data attributes of the input field to obtain the error messages.

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