Phone Number Verification without Regular Expression
Blog post from Twilio
The article discusses how to verify phone numbers without using regular expressions, leveraging the Twilio Lookup API. It begins by setting up a basic Node.js project with Express and serving an HTML form that prompts users to enter their phone number. The server-side code uses the Twilio helper library to make requests to the Lookup API, which returns a HTTP 404 response if the number is invalid, indicating that it's not a valid phone number. The article then shows how to consume this route from the front-end using JavaScript and the Fetch API, verifying the input number in real-time and displaying visual feedback to the user based on the validity of the number.
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