I am new in JavaScript and still learning various things. Right now i'm stuck with adding and removing li elements from the list. I did the exercise just fine using jQuery, but now have difficulties with the pure JS version of the same task.
The main idea is to add a new li element by clicking on the button, and remove the the element by clicking on the X button right next to it. I have tried using 'this' and other advices mentioned in similar questions here on Stackoverflow, but nothing worked for me. Could you, please, guide me what am I doing wrong?
P.S. the adding function seems to be working in snippet, but console logs error: cannot read property 'addeventlistener' of null.
//declaring the variables
var btn = document.getElementsByClassName('btn');
var list = document.getElementById('list');
var add = document.getElementById('add');
//adding a new element to the list
add.addEventListener('click', function(){
var newElement = document.createElement('LI');
list.appendChild(newElement);
newElement.innerHTML= "I am a new element<button class='btn'>X</button>";
});
//removing the clicked element
btn.addEventListener('click', function(){
list.parentNode.removeChild(this);
});ul li {
decoration: none;
display: block;
margin-top: 1em;
text-align: center;
font-family: 'Avant Garde', Avantgarde, 'Century Gothic', CenturyGothic, AppleGothic, sans-serif;
font-size: 18px;
}
#add {
background-color: black;
color: white;
border: none;
width: 280px;
font-color: white;
border-radius: 8px;
font-size: 16px;
padding: 15px;
outline: none;
text-align: center;
margin: 20px auto;
display: block;
}
#add:hover {
background-color: #28364d;
color: white;
border: none;
outline: none;
}
#add:active {
position: relative;
bottom: 2px;
}
.btn{
margin-left: 10px;
border-radius: 10px;
background-color: #000;
color: white;
border: none;
outline: none;
font-size: 14px;
font-family: sans-serif;
}
.btn:active {
position: relative;
bottom: 2px;
}<div>
<ul id="list">
<li class="element">I am a new element<button class="btn">X</button></li>
<li class="element">I am a new element<button class="btn">X</button></li>
<li class="element">I am a new element<button class="btn">X</button></li>
<li class="element">I am a new element<button class="btn">X</button></li>
<li class="element">I am a new element<button class="btn">X</button></li>
</ul>
<button id="add">Add an element to the list</button>
</div>