Example Of React Forms

As an example you can disable the form while the form is actively submitting.

Example of react forms. In react the form is usually implemented by using controlled components. The user clicks submit button. So to start here is a form component in react using the class syntax.

At that point the application will fetch the details of that company from the github rest api so we can work with the data in react. This state username. Render return form h1 hello this state username this state age h1 p enter your name p input type text name username onchange this mychangehandler.

We re keeping this page focused on the ones that use react without third party state management libraries. Let s see bellow example react input field validation example. In this application we want to use a form to capture some input data from a user.

Import react usestate from react. Inside onsubmit the async function saveformdata makes a fetch post request to api registration. Html form elements work a little bit differently from other dom elements in react because form elements naturally keep some internal state.

Let val event target value. Class myform extends react component constructor props super props. If the form validation fails then onsubmit event handler is not invoked.

In this chapter we will learn how to use forms in react. If nam age if number val alert your age must be a number. Log name return form onsubmit handlesubmit input placeholder name value name onchange handlenamechange button submit button form.