Javscript-Tasks/practise.html at main · CSS-AMU/Javscript-Tasks · GitHub

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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <button id="btn">click me</button>
    <h1 id="heading"></h1>
    <script>
      const hex = [1, 2, 3, 4, 5, 6, 7, 8, 9, "A", "B", "C", "D", "E", "F"];
      window.onload = function () {
        document.getElementById("btn").addEventListener("click", changeColor);
      };

      function displayHex(hexValue) {
        document.getElementById("heading").innerHTML = hexValue;
      }

      function randomcolor() {
        let hexa = "#";
        for (let i = 0; i < 6; i++) {
          hexa += hex[getRandomNumber()];
        }
        return hexa;
      }

      function getRandomNumber() {
        return Math.floor(Math.random() * hex.length);
      }

      function changeColor() {
        color = randomcolor();
        document.body.style.backgroundColor = color;
        displayHex(color);
      }
    </script>
  </body>
</html>