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Boonsuen Oh
18,788 PointsJS and DOM quiz
Question How would you select the body element using document.getElementsByTagName, and store it in the variable body?
const body = ______________;
My answer const body = document.getElementsByTagName("body");
And it got wrong.
Jonathan Grieve
Treehouse Moderator 91,254 PointsIs the semi colon not given as part of the answer though? So in this case you don't need to supply it! :-)
Dennis Brown
28,742 PointsI didn't see one on the body question. I did see one on the future question. Oversight?
1 Answer
Steven Parker
243,656 Points
You forgot to convert from a collection to an element.
Since the function returns a collection, but you are being asked to store just the element, you must convert. In this case, since there is only one element of that type in the document, you can convert by simply subscripting with the index 0:
const body = document.getElementsByTagName("body")[0];
The correct answer is scored properly with or without the ending semicolon. Semicolons are optional (but considered a "best practice") in JavaScript when the statement is followed by a newline.
Boonsuen Oh
18,788 PointsThanks!
Boonsuen Oh
18,788 PointsWhat if I want to select multiple elements?
Dennis Brown
28,742 PointsLeave the index off.
document.getElementsByTagName("body");
Dennis Brown
28,742 PointsDennis Brown
28,742 PointsYes, I had this same issue. There is a similar question in a future quiz, and leaving the semi-colon off allowed it to be excepted as a valid answer. I think the body one is too early to answer using the .querySelector, but it's quite possible it's out of order. This particular course is extremely particular about it's answers, making it extremely annoying.