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<!DOCTYPE html> <html> <head> <style> [class|=top] { background: yellow; } </style> </head> <body> <h1 class="top-header">Welcome</h1> <p class="top-text">Hello world!</p> <p class="content">Are you learning CSS?</p> <p><b>Note:</b> For [<i>attribute</i>|=<i>value</i>] to work in IE8 and earlier, a DOCTYPE must be declared.</p> </body> <!-- Mirrored from www.w3schools.com/cssref/tryit.asp?filename=trycss_sel_attribute_hyphen by HTTrack Website Copier/3.x [XR&CO'2014], Fri, 23 Jan 2015 08:14:16 GMT --> </html>
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