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Beginner2701

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Posts posted by Beginner2701

    Javascript code doesn't run

    in JavaScript

    Posted

    Hello together,

    I am learning JavaScript at the moment and I cannot run a simple code. I do not know if there is a mistake or if I have to install something first!? Quite frustrating since I am at the very beginning.

    My code is shown below. It is more or less exactly the code from a lesson I was recently doing, so it should be correct. I just wanted to do a first test to update a webpage by pressing a button. The page should present the username + "signed up" after entering the name and pressing the button. However, if I test it in my firefox it doesn't work. Does also not work in Edge. Is there a mistake in the code? I saved the file under test.html in case that's relevant.

    I would appreciate your help!

    <!DOCTYPE html>
    <html lang="en" dir="ltr">
      <head>
        <meta charset="utf-8">
        <title>test</title>
      </head>
      <body>

    <input id="usernameInput" type="text" placeholder="username">
    <button onclick="signUp()">Sign up</button>
    <p id="message"></p>

    <script type="text/javascript">

    function signUp() {
      var username = document.getElementsByID("usernameInput").value;
      document.getElementsByID("message").innerHTML = username + " signed up";
    }

    </script>

      </body>
    </html>

     

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