JSFiddle - React, Tailwind, and code Playground

by quantum_leap123

HTML

<!DOCTYPE html>
<html lang="en">


  <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width,
 initial-scale=1.0">
    <title>RegEx
      mailadres</title>
  </head>


  <body>
    <script>
      function
      vraagEmail() {
        const
          inputEmail =
          prompt("Wat is je e-mailadres?");


        const
          emailRegEx =
          /^[A-Za-z0-9_]+([.-][A-Za-z0-9_]+)*@[A-Za-z0-9_]+([.-]?[A-Za-z0-9_]+)*(\.[A-Za-z0-9_]+([.-]?[A-Za-z0-9_]+)*)*(?<!\.vlaanderen)$/;


        if (emailRegEx.test(inputEmail)) {
          document.write(`<p>${inputEmail}
 is een geldig e-mailadres.</p>`);
        } else {
          document.write(`<p>${inputEmail}
 is geen geldig e-mailadres.</p>`);
        }
      }


      vraagEmail();

    </script>
  </body>


</html>