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Why is it necessary to do both client-side and server side validation?
Validation should always be performed server-side – you can never trust client-side validation. Client-side validation is always in the sense of providing a better User Experience (UX), so the user doesn’t have to submit and reload a page simply because a value in a form isn’t valid – it makes things more dynamic.
Why do we use server side validation?
Server-side code is used to validate the data before the data is saved in the database or otherwise used by the application. If the data fails validation, a response is sent back to the client with corrections that the user needs to make. It can be done using programming languages like C#.NET, VB.NET, etc.
What do u mean by client-side validation?
When you enter data, the browser and/or the web server will check to see that the data is in the correct format and within the constraints set by the application. Validation done in the browser is called client-side validation, while validation done on the server is called server-side validation.
What’s the difference between client side and server side validation?
Server-side validation treats all incoming data as untrusted, it’s the gateway into the rest of the system. Client-side validation helps make the experience smooth for an end user and attempt to reduce some load from the server. With both in place, you hit the whole punch-list of options above.
Is it safe to use client side validation in JavaScript?
While client-side validation can provide a responsive, intuitive and smooth user experience, it’s necessary to remember that it’s not reliable and adds no security as it can be easily turned off by the user if they simply disable JavaScript or remove the HTML validations using standard developer tools.
Is it OK to not validate user input?
Not validating user input is like trusting people and not installing locks on your house. Validation should always be performed server-side – you can never trust client-side validation.
Can you use server side validation in IE 9?
Also keep in mind that HTML5 validations are not supported by many older browsers and won’t work in IE 9 and earlier. Server-side validation is the consistent, secure validation that we trust will execute without fail on all input.