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CSS

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Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

HTML

              
                <!--PEN CODE-->
<div id="tasker" class="tasker">
	<div id="error" class="error">Please enter a task</div>
	<div id="tasker-header" class="tasker-header">
		<input type="text" id="input-task" placeholder="Enter a task">
		<button id="add-task-btn"><i class="fa fa-fw fa-plus"></i>
		</button>
	</div>
	<div class="tasker-body">
		<ul id="tasks"></ul>
	</div>
</div>
<!--END PEN CODE-->
              
            
!

CSS

              
                $primary: #313e50;
$grey: #cdcdcd;
$secondary: #1dd2af;

%reset {
	margin: 0;
	padding: 0;
	border: none;
	outline: none;
	background: transparent;
}

%transition {
	transition: all 0.2s ease;
	-webkit-transition: all 0.2s ease;
}

body {
	background: #f1f1f1;
	margin-top: 2rem;
}

/*PEN STYLES*/
.tasker {
	max-width: 400px;
	margin: 0 auto;
	.error {
		display: none;
		background: rgba(237, 28, 36, 0.7);
		color: #fff;
		padding: 14px;
		margin-bottom: 10px;
		border-radius: 5px;
		text-align: center;
	}

	ul {
		@extend %reset;
		background: #fff;
	}

	li,
	.error,
	button,
	input {
		@extend %reset;
		font: 18px/1.25em Helvetica, Arial, Sans-serif;
	}
}

.tasker-header {
	display: inline-flex;
	background: $primary;
	justify-content: space-between;
	width: 100%;
	input,
	button {
		color: #fff;
		box-sizing: border-box;
		font-size: 1.25em;
		padding: 14px;
	}

	input {
		flex-grow: 2;
	}

	button {
		@extend %transition;
		background: $secondary;
		border-left: 1px solid ($secondary * 1.05);
		&:hover {
			background: $secondary * 1.1;
		}
	}
}

.tasker-body {
	.task {
		display: block;
		position: relative;
		padding: 14px 40px 14px 14px;
		border-bottom: 1px solid rgba(0, 0, 0, 0.1);
		&:last-child {
			border-bottom: none;
		}

		&:hover > button {
			opacity: 1;
		}

		&.completed {
			color: $grey;
			text-decoration: line-through;
		}

		input {
			margin-right: 10px;
		}

		button {
			@extend %transition;
			color: $grey;
			margin: 14px;
			position: absolute;
			top: 0;
			right: 0;
			opacity: 0;
			&:hover {
				color: #ed1c24;
			}
		}
	}
}
              
            
!

JS

              
                (function() {
	'use strict';
	var tasker = {
		init: function() {
			this.cacheDom();
			this.bindEvents();
			this.evalTasklist();
		},
		cacheDom: function() {
			this.taskInput = document.getElementById("input-task");
			this.addBtn = document.getElementById("add-task-btn");
			this.tasklist = document.getElementById("tasks");
			this.tasklistChildren = this.tasklist.children;
			this.errorMessage = document.getElementById("error");
		},
		bindEvents: function() {
			this.addBtn.onclick = this.addTask.bind(this);
			this.taskInput.onkeypress = this.enterKey.bind(this);
		},
		evalTasklist: function() {
			var i, chkBox, delBtn;
			//BIND CLICK EVENTS TO ELEMENTS
			for (i = 0; i < this.tasklistChildren.length; i += 1) {
				//ADD CLICK EVENT TO CHECKBOXES
				chkBox = this.tasklistChildren[i].getElementsByTagName("input")[0];
				chkBox.onclick = this.completeTask.bind(this, this.tasklistChildren[i], chkBox);
				//ADD CLICK EVENT TO DELETE BUTTON
				delBtn = this.tasklistChildren[i].getElementsByTagName("button")[0];
				delBtn.onclick = this.delTask.bind(this, i);
			}
		},
		render: function() {
			var taskLi, taskChkbx, taskVal, taskBtn, taskTrsh;
			//BUILD HTML
			taskLi = document.createElement("li");
			taskLi.setAttribute("class", "task");
			//CHECKBOX
			taskChkbx = document.createElement("input");
			taskChkbx.setAttribute("type", "checkbox");
			//USER TASK
			taskVal = document.createTextNode(this.taskInput.value);
			//DELETE BUTTON
			taskBtn = document.createElement("button");
			//TRASH ICON
			taskTrsh = document.createElement("i");
			taskTrsh.setAttribute("class", "fa fa-trash");
			//INSTERT TRASH CAN INTO BUTTON
			taskBtn.appendChild(taskTrsh);

			//APPEND ELEMENTS TO TASKLI
			taskLi.appendChild(taskChkbx);
			taskLi.appendChild(taskVal);
			taskLi.appendChild(taskBtn);

			//ADD TASK TO TASK LIST
			this.tasklist.appendChild(taskLi);

		},
		completeTask: function(i, chkBox) {
			if (chkBox.checked) {
				i.className = "task completed";
			} else {
				this.incompleteTask(i);
			}
		},
		incompleteTask: function(i) {
			i.className = "task";
		},
		enterKey: function(event) {
			if (event.keyCode === 13 || event.which === 13) {
				this.addTask();
			}
		},
		addTask: function() {
			var value = this.taskInput.value;
			this.errorMessage.style.display = "none";

			if (value === "") {
				this.error();
			} else {
				this.render();
				this.taskInput.value = "";
				this.evalTasklist();
			}
		},
		delTask: function(i) {
			this.tasklist.children[i].remove();
			this.evalTasklist();
		},
		error: function() {
			this.errorMessage.style.display = "block";
		}
	};

	tasker.init();
}());
              
            
!
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