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<!DOCTYPE html> | |
<html> | |
<head> | |
<title></title> | |
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.js"></script> | |
<script src="application.js"></script> | |
<link href="application.css" type="text/css" rel="stylesheet"></link> | |
</head> | |
<body> | |
<div id="todo"> | |
<div class="toolbox"> | |
<input type="text" /><button class="add">Add Todo</button> | |
</div> | |
<div class="todo_list"> | |
</div> | |
<div id="todo_template" style="display: none;"> | |
<div class="todo" draggable="true"> | |
<h2>Todo Name</h2> | |
<ul> | |
<li><a href="#" class="delete">Delete</a></li> | |
<li><a href="#" class="complete">Complete</a></li> | |
</ul> | |
</div> | |
</div> | |
</div> | |
</body> | |
</html> |
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#todo { | |
width: 200px; | |
margin-left: auto; | |
margin-right: auto; | |
} | |
.toolbox { | |
text-align: center; | |
} | |
.todo.complete h2 { | |
text-decoration: line-through; | |
} | |
h2 { | |
margin-top:0.2em; | |
} | |
ul { | |
list-style-type: none; | |
margin:0; | |
padding:0; | |
} | |
.todo.over { | |
border: 2px dashed #000; | |
} | |
.todo { | |
height: 100px; | |
width: 200px; | |
float: left; | |
border: 2px solid #666666; | |
background-color: #ccc; | |
margin: 5px; | |
-webkit-border-radius: 10px; | |
-ms-border-radius: 10px; | |
-moz-border-radius: 10px; | |
border-radius: 10px; | |
-webkit-box-shadow: inset 0 0 3px #000; | |
-ms-box-shadow: inset 0 0 3px #000; | |
box-shadow: inset 0 0 3px #000; | |
text-align: center; | |
cursor: move; | |
} | |
[draggable] { | |
-moz-user-select: none; | |
-khtml-user-select: none; | |
-webkit-user-select: none; | |
user-select: none; | |
/* Required to make elements draggable in old WebKit */ | |
-khtml-user-drag: element; | |
-webkit-user-drag: element; | |
} |
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$(document).ready(function() { | |
function bindEvents() { | |
$('#todo').on('click',function(e) { | |
if(e.target && e.target.className == 'add') | |
{ | |
addTodo(); | |
} | |
if(e.target && e.target.className == 'delete') | |
{ | |
deleteTodo(e.target) | |
} | |
if(e.target && e.target.className == 'complete') | |
{ | |
completeTodo(e.target) | |
} | |
}) | |
} | |
function addTodo() { | |
var new_todo = $('#todo_template div').clone(); | |
new_todo.find('h2').text($('input').val()); | |
$('.todo_list').append($(new_todo)); | |
$('input').val(''); | |
} | |
function deleteTodo(element) { | |
console.log($(element).closest('.todo').remove()); | |
} | |
function completeTodo(element) { | |
console.log($(element).closest('.todo').toggleClass('complete')); | |
} | |
bindEvents(); | |
function handleDragStart(e) { | |
this.style.opacity = '0.4'; // this / e.target is the source node. | |
} | |
var todos = document.querySelectorAll('.todo div'); | |
[].forEach.call(todos, function(todo) { | |
todo.addEventListener('dragstart', handleDragStart, false); | |
}); | |
function handleDragOver(e) { | |
if (e.preventDefault) { | |
e.preventDefault(); | |
} | |
e.dataFransfer.dropEffect = 'move'; | |
} | |
function handleDragEnter(e) { | |
this.classList.add('over'); | |
} | |
function handleDragLeave(e) { | |
this.classList.remove('over'); | |
} | |
function get_todos(){ | |
document.querySelector('#columns .column'); | |
} | |
if(get_todos() != null) | |
{ | |
[].forEach.call(get_todos(), function(todo) { | |
todo.addEventListener('dragstart', handleDragStart, false); | |
todo.addEventListener('dragenter', handleDragenter, false); | |
todo.addEventListener('dragover', handleDragOver, false); | |
todo.addEventListener('dragleave', handleDragLeave, false); | |
}); | |
} | |
}); |
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sdv |
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## Overview | |
Understanding how to bind and handle events is a core part of being a web developer. This challenge tasks you to take a reasonably well factored Javascript application and extend it to include event bindings. Some of the good practices you'll see in the provided code are: | |
1. Using templates from the HTML to add elements. | |
3. Using functions to scope variables (i.e. todoTemplate is accessible within buildTodo, but *not* in the global scope. [Why?](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions_and_function_scope?redirectlocale=en-US&redirectslug=JavaScript%2FReference%2FFunctions_and_function_scope)) | |
3. Using functions to do only one thing (i.e. building the Todo DOM Element vs | |
building the element *and* adding it to the list) | |
This should provide you with a solid foundation to complete the remaining | |
features. | |
### Core | |
This challenge requires you to manipulate objects that have been added | |
dynamically. You may want to brush up on [Event | |
Delegation](http://davidwalsh.name/event-delegate). | |
#### Objectives | |
Download the [todo | |
skeleton](http://s3.amazonaws.com/dbc_socrates/challenges/js-events.zip) and | |
modify it so: | |
1. A todo may be added to the page. | |
2. A todo may be marked as complete. | |
3. A todo may be removed from the page. | |
(Hint: Create named functions and bind them to the appropriate buttons) | |
### Stretch | |
When creating lists, you often want to reorder them. Use [HTML5 Drag and | |
Drop](http://www.html5rocks.com/en/tutorials/dnd/basics/) events to allow manual | |
sorting of the todo list. |
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