by Chris Coyier
Essentially a way to import a block of dependancies (scripts and styles) into an HTML document.
<link rel="import" href="imports.html">
It doesn't actually just plop the content from the referenced file where you call it though, like an
@import does in CSS or and include does in a server side language. HTML could very much use that.
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*May or may not contain any actual "CSS" or "Tricks".