Use rel="noopener" for your hyperlinks with target="_blank"

July, 2020

Using  `target="_blank"` can be dangerous and affect performance since `window.opener` will have reference to previous window.


window.opener returns a reference to the window that opened the window using `open()`.

( if the window A opens a window B, B.opener returns A)


To prevent this (set window.opener to null ) use ` rel="noopener" ` for older browser support use  ` rel="noreferrer`


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