React Tutorial - Learn React JS - Course Lessons #7 - Form Validation and Errors - Learn ReactJS
React Tutorial - Learn React JS - Course Lessons #7 - React Forms - Validations and Errors - Learn ReactJS
React terms : Form, Form Validation, Validating Input Fields, Errors, Form Errors, Error Messages, input fields, text fields, Props, onChange, currentTarget, currentTarget.name, currentTarget.value, React state, Disable submit button for invalid form, validate on change in value, validate onBlur
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Learn how to validate the input fields in a form by defining an errors JSON in state and populating it with error messages.
Sample Codes explained in the tutorial are
Validate the form when submit button is clicked
Disable the submit button if form is invalid and enable it when the form is valid
Validate a field when it loses focus i.e. on onBlur event
Validate a field when its value changes i.e. on onChange event
With Sample Codes and Exercises, do the exercises and understand the various validation techniques.
Learn complete React in this video tutorial series. A must watch for all ReactJS beginners and learners. With lots of samples, code, practice questions and projects, learn and master React and become an awesome front end developer.
00:00 Validating forms in React
01:15 Sample Code : Implementing Form Validation on Submit
14:14 Sample Code : Adding more Validations to the React Form
20:26 Code Exercise : Disable Submit button if Form is InValid
23:20 Code Exercise : Validate field when it loses focus
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