$ 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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