HTML5 and CSS3, Second Edition
Tip 34 Tip 34. Getting It All Sorted Out with Drag and Drop Since the introduction of the mouse, we’ve been trained to drag elem ...
html5_dragdrop/index.html <!DOCTYPEhtml> <htmllang='en'> <head> <metacharset="utf-8"> <title>Aweso ...
We’re using the :active pseudoclass to change the border on the card when the user clicks and holds on the element. Adding Cards ...
button, and new index cards get added to the user interface. Since we set the contenteditable attribute, we can click on each on ...
To do all of this, we want to watch the ondragstart() event on each card. Adding event handlers to each card creates a lot of ha ...
To ensure that dragging and dropping works correctly, we need to prevent the dragover event from firing, because by default the ...
html5_dragdrop/javascripts/cards.js Line 1 if('draggable'indocument.createElement('div')) { }else{ createDragAndDropEvents(); ...
As a general rule, when thinking about implementing technologies, don’t look for fallbacks only for people who are on old web br ...
CHAPTER 11 Where to Go Next We’ve covered a lot in this book, but there are many other related technologies that make web develo ...
3D Canvas with WebGL^1 Creates 3D objects on the canvas. [C8, F4, S5.1, O12] We’ll start by looking at a much better way to defi ...
<p> Duisauteiruredolorin reprehenderitin voluptatevelitessecillum doloreeu fugiatnullapariatur.Excepteursintoccaecatcupida ...
Even cooler is the fact that we can reorder the elements in the document. The main region was defined in the document first, but ...
That’s it. As long as that’s set, a modern browser will have no trouble hitting that service and handling requests. It’ll send a ...
document. The data from YouTube then gets passed to the callback function we specified. All we have to do is write the callback ...
In this case we’re sending the search term to the worker. The worker can send us messages back, and we can act on those messages ...
// API callback processResults({ "version":"1.0", "feed":{ "title":{ "$t":"Videosmatching:pragprog", "type":"text" }, "entry":[{ ...
Finally, back in javascripts/application.js, we fill in the onmessage() event handler and add each result to the page: where_nex ...
To demonstrate this we’ll set up a very basic page that will display messages from our server. The web server available in the b ...
That’s the word data, followed by a colon, followed by the message text, followed by a blank line—not just a newline character, ...
Implementing Your Own Server To pull this off in a live environment, you’ll need to write server-side code that sends continuous ...
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