Sites such as Facebook, track user clicks by adding the "ref" parameter to each navigational element. Below is an example of how Facebook links their logo.
拿Facebook为例，它为每一个导航元素增加了“ref”属性来跟踪用户点击。
Sites such as Facebook, track user clicks by adding the "ref" parameter to each navigational element. Below is an example of how Facebook links their logo.
拿Facebook为例，它为每一个导航元素增加了“ref”属性来跟踪用户点击。
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