![]() Enough for introduction, let’s get our hands dirty. For instance, rejecting creation of an employee if the manager of the department is not assigned yet. Also, we validate constraints that need more logical operations on server-side. Briefly, server-side validation is our last chance to reject incorrect inputs properly. Here’s where server-side validation comes into play. If we go on with the above image, we should create a validation mechanism that rejects any other number than 911 as input. Here’s a great representation what it is like to trust any kind of client-side validation. pattern, length, characters)īut client-side validations can be considered useless since they can be easily manipulated or disabled. So we can say that client-side validations are mostly used to give user fast feedback and validate syntactical things. If we control and reject any incorrect input value on the client-side we eliminate the time for this request to go server-side and get rejected. Also, we have a pattern that validates phone number. So, first of all, we should prevent user to type any character other than numbers. For instance, we have a field that accepts phone number. In web applications, we generally use both client-side and server-side validations for form data or any other data that goes to server-side.īecause we use client-side validation to validate and respond quickly. Why do we need both client-side and server-side validation? ![]() Creating Your Own Validation Annotations.Why do we need both client-side and server-side validation?.
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