09. Timers Intervals 👩‍🏫🧑‍🏫

index.html

<!DOCTYPE html>
<html lang="en-gb">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Timers and Intervals</title>
</head>
<body>  
    <h1 class="time" style="text-align:center;"></h1>
    <div id="main"></div>

    <script src="./script.js"></script>
</body>
</html>

script.js

// Selects element by class
var timeEl = document.querySelector(".time");

// Selects element by id
var mainEl = document.getElementById("main");

var secondsLeft = 10;

function setTime() {
  // Sets interval in variable
  var timerInterval = setInterval(function() {
    secondsLeft--;
    timeEl.textContent = secondsLeft + " seconds left till colorsplosion.";

    if(secondsLeft === 0) {
      // Stops execution of action at set interval
      clearInterval(timerInterval);
      // Calls function to create and append image
      sendMessage();
    }

  }, 1000);
}

// Function to create and append colorsplosion image
function sendMessage() {
  timeEl.textContent = " ";
  var imgEl = document.createElement("img");
  imgEl.setAttribute("src", "images/image_1.jpg");
  mainEl.appendChild(imgEl);

}

setTime();