Submodule 5.2: Simple JavaScript file

  • JavaScript in HTML file
  • alert interaction
  • Variables
  • prompt interaction
  • Comments in JavaScript
  • Developer tools (console)

The "alert" JavaScript file

We will put our code on the head of the HTML file:

It is the simple interaction "alert".

<!DOCTYPE html>
<html lang="en">
  <head>
    <title>Example of alert()</title>
    <script>
        alert("Hello world");
    </script>
  </head>
  <body>
  </body>
</html>

Copy and paste the code into your editor to see the output. Save the file in the folder ''yourNameWEB2JS" as example05.2.02.html". Next,  open the file (Ctrl+O) in your Chrome. 

alert popup