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Help: attr() CSS function
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The attr() Function
Additional links:
Web developer help forum
Syntax for attr()
Syntax
CSS
attr( attribute-name )
Recommended Links
CanIUse.com: Search "attr" (compatibility information)
MDN: attr()
Search Engine Links (for more information)
Bing "CSS attr function"
Google "CSS attr function"
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Help: attr() CSS function