JavaScript preprocessors can help make authoring JavaScript easier and more convenient. For instance, CoffeeScript can help prevent easy-to-make mistakes and offer a cleaner syntax and Babel can bring ECMAScript 6 features to browsers that only support ECMAScript 5.
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.
You can apply a script from anywhere on the web to your Pen. Just put a URL to it here and we'll add it, in the order you have them, before the JavaScript in the Pen itself.
If the script you link to has the file extension of a preprocessor, we'll attempt to process it before applying.
You can also link to another Pen here, and we'll pull the JavaScript from that Pen and include it. If it's using a matching preprocessor, we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.
HTML Settings
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.
<ol data-draggable="target">
<li data-draggable="item">Item 0</li>
<li data-draggable="item">Item 1</li>
<li data-draggable="item">Item 2</li>
<li data-draggable="item">Item 3</li>
</ol>
<ol data-draggable="target">
<li data-draggable="item">Item 4</li>
<li data-draggable="item">Item 5</li>
</ol>
<ol data-draggable="target">
<li data-draggable="item">Item 6</li>
<li data-draggable="item">Item 7</li>
</ol>
<ol data-draggable="target">
<li data-draggable="item">Item 8</li>
</ol>
/* canvas styles */
html, body
{
font:normal normal normal 100%/1.4 tahoma, sans-serif;
background:#f9f9f9;
color:#000;
}
body
{
font-size:0.8em;
}
/* draggable targets */
[data-draggable="target"]
{
float:left;
list-style-type:none;
width:42%;
height:7.5em;
overflow-y:auto;
margin:0 0.5em 0.5em 0;
padding:0.5em;
border:2px solid #888;
border-radius:0.2em;
background:#ddd;
color:#555;
}
/* draggable items */
[data-draggable="item"]
{
display:block;
list-style-type:none;
margin:0 0 2px 0;
padding:0.2em 0.4em;
border-radius:0.2em;
line-height:1.3;
}
(function()
{
//exclude older browsers by the features we need them to support
//and legacy opera explicitly so we don't waste time on a dead browser
if
(
!document.querySelectorAll
||
!('draggable' in document.createElement('span'))
||
window.opera
)
{ return; }
//get the collection of draggable items and add their draggable attribute
for(var
items = document.querySelectorAll('[data-draggable="item"]'),
len = items.length,
i = 0; i < len; i ++)
{
items[i].setAttribute('draggable', 'true');
}
//variable for storing the dragging item reference
//this will avoid the need to define any transfer data
//which means that the elements don't need to have IDs
var item = null;
//dragstart event to initiate mouse dragging
document.addEventListener('dragstart', function(e)
{
//set the item reference to this element
item = e.target;
//we don't need the transfer data, but we have to define something
//otherwise the drop action won't work at all in firefox
//most browsers support the proper mime-type syntax, eg. "text/plain"
//but we have to use this incorrect syntax for the benefit of IE10+
e.dataTransfer.setData('text', '');
}, false);
//dragover event to allow the drag by preventing its default
//ie. the default action of an element is not to allow dragging
document.addEventListener('dragover', function(e)
{
if(item)
{
e.preventDefault();
}
}, false);
//drop event to allow the element to be dropped into valid targets
document.addEventListener('drop', function(e)
{
//if this element is a drop target, move the item here
//then prevent default to allow the action (same as dragover)
if(e.target.getAttribute('data-draggable') == 'target')
{
e.target.appendChild(item);
e.preventDefault();
}
}, false);
//dragend event to clean-up after drop or abort
//which fires whether or not the drop target was valid
document.addEventListener('dragend', function(e)
{
item = null;
}, false);
})();
Also see: Tab Triggers