As for instance, if fullName is the input field ( in lines 33-38), then the function will check the length of the value in that field. We can see that in the function there is an implementation of a Switch-case in it which rules that are specific to the input field are applied. In the handleChange function, the actual rules of validations have been applied. If an error is observed then the function outputs it over the console. The function validateForm is there to check whether any of the input fields present have any error or not. The validEmailRegex variable holds the rules of the Regex in order to check whether the given input is a valid email or not. The lines of code are explained below: Line 1-5:
As soon as you click the create button, the console tab shows if the form is valid or not. We’ll show and explain the code line-wise. In the handleChange function, form validation rules are applied that are responsible to handle the inputs from the users.
Now we are going to see a code below that assumes that the user is familiar with the elements and procedures that are needed to make a React form. After reading this article you will be able to create your own custom form validation in the React components present in our application. Join us as we walk through to add custom form validation in our React application in just a few simple steps. In this article, we will take a look at some of the most commonly used solutions for form validation and management in React.
In React, form validation allows the error message to be displayed in our application in the case when the user did not fill out the form correctly with the type of input expected from them. So, in order to implement a solution the first step is always to look for the pre-existing solutions to the same problem and that is what React is all about! It allows us to create components that are reusable so that there is no need to repeat ourselves in the code. Introduction About React Form Validation:īeing a developer, it is generally suggested that it is usually best not to reinvent the existing wheel.
0 kommentar(er)
