HTML5 and CSS3, Second Edition

Web Workers

Process intensive or long running tasks in a background thread. [C4, S4,

F3.5, IE10, O12.1, iOS5, A2.1]

Referenced in Section 11.3, Web Workers, on page 243

Server-Sent Events

Allows one-way messaging from the server to connected clients. [C6, F6,

S5, O11, iOS4]

Referenced in Section 11.4, Server-Sent Events, on page 247

3D Canvas with WebGL^1

Creates 3D objects on the canvas. [C8, F4, S5.1, O12]

Referenced in Section 11.6, WebGL, on page 252

1. This may be disabled by default or require the most recent video drivers to work
   properly.

report erratum • discuss

Additional APIs • 261

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