Course Content

  • custom hook and forms

Course Content


  • $ npm install create-react-app create-react-app create-react-app create-react-app create-react-app create $ react-form-validation-demo create-react-app
  • $ npm start react-form-validation-demo/
  • $ npm install react-bootstrap — this will save you time. $ npm install bootstrap@3 — don't forget to save.
  • Include 'bootstrap/dist/css/bootstrap' in your imports.

Input validation is a method of systematically rejecting or accepting input according to a set of rules. Before processing user input or data from untrusted systems, this is a basic software coding technique.

Input validation prevents data from entering an information system that has been incorrectly formatted. Because detecting a hostile user attempting to attack software is challenging, programmes should examine and validate all data submitted into a system.

  • inputElement.checkValidity() returns true or false.
  • The validity-state object is returned by inputElement.validity. True or false is returned by inputElement.validity.valid.

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