[Malleys]

<template id="list-template">
	<div class="list" id="list" style="margin: 1em;">
		<div class="task" id="task">
			<div class="task-txt">
				<div class="task-header">Lorem</div>
				<div class="task-description">Lorem ipsum dolor sit amet</div>
			</div>
			<div class="task-buttons">
				<input type="button" class="task-done" value="done">
				<button class="task-edit"><i class="fas fa-edit"></i></button>
				<button class="task-delete" id="delete">Delete<i class="fas fa-trash"></i></button>
				<input type="checkbox" class="task-follow">
			</div>
		</div>
	</div>
</template>
<button id="add-button">Add</button>
<script>
	var i = 1;

	// пример добавления
	document.getElementById("add-button").addEventListener("click", function(event) {
		var list = document.getElementById("list-template").content.cloneNode(true);
		list.querySelector(".task-header").textContent += "#" + i++;
		document.body.appendChild(list);
	});
	
	// пример обработки события 
	document.addEventListener("click", function(event) {
		if(event.target.matches(".list .task-delete")) {
			event.target.closest(".list").remove();
		}
	});
</script>