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When you hear the word validation in the context of a web application, you generally think of validating user input on a form. This usually evokes thoughts of writing event-handler code to perform various checks on form input before submitting it. All of this can quickly become rather messy. No matter how well you externalize your scripts and set up basic event-handler code that just calls functions, the simple fact is that these validations are scattered throughout your code—it’s just a question of to what degree that’s true.
KeywordsConfiguration File Validation Error Event Handler Field Validation Format String
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