regex - Extract values with ampersands from query string -

i want extract baz value following query string:

foo=bar&baz=qux&norf&corge=grault

the problem value of baz contains &. i've had success using lookhead this:

/baz=(.*)(?=[^=]*&)/

however, can't handle end of line or when there more 1 key-value after it.

is there regexp can handle this?

baz=([^=]*)(?=&|$)

this should you.see demo.

Dil