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Start your free trialSamuel Kleos
Front End Web Development Techdegree Student 13,307 PointsWhy can't I add a button to the <li> before adding text content to the same <li>? See my snapshot.
Here is my snapshot: https://w.trhou.se/qohzirpvk9
Please consider this button creation function which adds a button to a list item:
function addBtnRemove(li) {
let btnRemove = document.createElement('button');
btnRemove.className = 'remove';
btnRemove.textContent = "Remove";
li.appendChild(btnRemove);
}
If I add the btnRemove function after the li.textContent = input.value;
the button appears on the newly created list item just fine:
btnCreate.addEventListener('click', () => {
const input = document.querySelector('.input-main');
let ul = document.getElementsByTagName('ul')[0];
let li = document.createElement('li');
li.textContent = input.value;
addBtnRemove(li);
ul.appendChild(li);
input.value = '';
});
However, If I add the btnRemove function before li.textContent = input.value;
the button doesn't appear:
btnCreate.addEventListener('click', () => {
const input = document.querySelector('.input-main');
let ul = document.getElementsByTagName('ul')[0];
let li = document.createElement('li');
addBtnRemove(li);
li.textContent = input.value;
ul.appendChild(li);
input.value = '';
});
Why?
1 Answer
Rachel Johnson
Treehouse TeacherHey Samuel, thanks for your question! This essentially comes down to the use of .textContent
. .textContent
replaces the contents of that HTML DOM element.
By calling addBtnRemove(li)
before line 48, you're:
- appending a button to
li
- and then changing it's content to [your string here]
Essentially the button is wiped by using
.textContent
By calling addBtnRemove(li)
AFTER line 48, you're:
- changing li's contents to [your string here]
- appending a button to li Therefore both will appear because we added the button after changing the content
I hope this helps!
Samuel Kleos
Front End Web Development Techdegree Student 13,307 PointsSamuel Kleos
Front End Web Development Techdegree Student 13,307 PointsHi Rachel, can you reactivate my slack account, please? I've just rectified my subscription. Thank you