Open Graph Protocol can be a schema markup (It is usually often called a vocabulary) produced by Facebook in order to combine and relate Internet pages and create its rich representation within the social graph. In observe, Open Graph allows Facebook's Like Response - The module functions fantastic with the default and almost every other free or

Courses are utilized the place the fashion is recurring, e.g. say you head a Unique type of header for mistake messages, you may develop a design and style h1.error which might only utilize to The elemental difference between is you could reuse a category on your own page over and over, While an ID may be used once. That's, not surprisingly, if