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

Nicholas Mason
Nicholas Mason
2,062 Points
Posted by Nicholas Mason
Nicholas Mason
2,062 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
229,771 Points
Steven Parker
Steven Parker
229,771 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
2,062 Points
Nicholas Mason
Nicholas Mason
2,062 Points

I ended up figuring it out. Thank you.