What does |& (vertical bar, ampersand) mean in bash?

Question

What does |& (vertical bar, ampersand) mean in bash? E.g.

node app.js |& logger -t my-app &

Answer 1

|& is syntactic sugar for 2>&1 | added in Bash 4.
I.e. it redirects both standard and error outputs of command preceding |& to standard input of the following command.

Advanced bash scripting guide documentation