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JavaScript JavaScript and the DOM Getting a Handle on the DOM Select by ID

Posted by Nicholas Mason
Nicholas Mason
2,313 Points

I'm super confused

Someone please tell me what I'm doing wrong.

app.js 
// Complete the challenge by writing JavaScript below
const button = button.getElementById('button', btn-phrase);

button.addEventListener('click', () => {
  alert(input.value);
});
index.html 
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <title>Phrase Sayer</title>
  </head>
  <body>
    <p><label for="input-phrase">Type a phrase</label></p>
    <p><input type="text" id="input-phrase"></p>
    <p><button id="btn-phrase">Say Phrase</button></p>
    <script src="app.js"></script>
  </body>
</html>

2 Answers

Steven Parker
Steven Parker
231,269 Points
Steven Parker
Steven Parker
231,269 Points

There's a few issues here:

  • you can't reference "button" while you are creating it
  • generally (and in this case for sure), you will call getElementById on the document element
  • the getElementById function takes only one argument, the ID
  • in this case, the ID should be a literal (enclosed in quotes)

So a corrected version might look like this:

const button = document.getElementById('btn-phrase');
Nicholas Mason
Nicholas Mason
2,313 Points
Nicholas Mason
Nicholas Mason
2,313 Points

I ended up figuring it out. Thank you.