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JavaScript

Posted by luisgomez7
luisgomez7
5,557 Points

I'm having trouble answering this question from the video series titled "Javascript and the DOM."

Here's the link for the question from the challenge: https://teamtreehouse.com/library/javascript-and-the-dom-3/getting-a-handle-on-the-dom/select-by-id

This is the question: "Declare a variable named button. Assign the variable the <button> element with the ID btn-phrase. Use the method that returns an element matching the specified ID."

// Complete the challenge by writing JavaScript below

let button = button.getElementById();

button.addEventListener('click', () => {
  alert(input.value);
});

My answer, as you can see above is "let button = button.getElementById();" However, the website keeps telling me button is not defined when I have clearly defined it. What am I doing wrong?

Saim Diaz
Saim Diaz
10,095 Points
Saim Diaz
Saim Diaz
10,095 Points

I am also having trouble with this quiz. Can someone help me with the answer?

3 Answers

luisgomez7
luisgomez7
5,557 Points
luisgomez7
luisgomez7
5,557 Points

My method produced a correct answer message from the website. Perhaps you're referring to a different question.

jb30
jb30
44,806 Points
jb30
jb30
44,806 Points

Try passing the id btn-phrase to button.getElementById().

luisgomez7
luisgomez7
5,557 Points

Unfortunately, that didn't work.

luisgomez7
luisgomez7
5,557 Points

Never mind. I figured it out.

luisgomez7
luisgomez7
5,557 Points
luisgomez7
luisgomez7
5,557 Points

Saim: The correct answer is let listItems = document.getElementsByTagName('li');. I've discovered using "const" instead of "let" works as well.

Saim Diaz
Saim Diaz
10,095 Points
Saim Diaz
Saim Diaz
10,095 Points

Thank you for responding Luis. However, aren't we supposed to declare a variable with the name button? And aren't we supposed to use a method that returns an ID? On mine I have: const button = document.getElementByID('btn-phrase'); but it says that document.getElementByID isn't a function. Not sure what I'm doing wrong.

jb30
jb30
44,806 Points

Try changing document.getElementByID to document.getElementById with a lowercase d in Id.

Saim Diaz
Saim Diaz
10,095 Points
Saim Diaz
Saim Diaz
10,095 Points

Thank you jb30! That's exactly what was wrong. Appreciate the help. And no worries Luis, I think we were talking about a different question as well. Thanks for the help anyways!