Welcome to the Treehouse Community
Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.
Start your free trialLuke Markham
Front End Web Development Techdegree Graduate 17,289 PointsWhy does the tagName have to be capitalized?
listDiv.addEventListener('click', (event) => {
if (event.target.tagName === 'BUTTON') {
let li = event.target.parentNode;
let ul = li.parentNode;
ul.removeChild(li);
}
});
///```
Why must "button" be capitalized to "BUTTON" ?
1 Answer
Steven Parker
231,236 PointsYou need to use upper case so you can match with the stored tag name you get from the system. As described on the MDN page ( use the link for more details):
For DOM trees which represent HTML documents, the returned tag name is always in the canonical upper-case form. For example, tagName called on a <div> element returns "DIV".