Array concatenation evaluating to string "test"

Created Sep 12, 2020 Edited Sep 12, 2020

Viewed 29

Can any body breakdown why this expression evaluates to "test"

console.log((!+[]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(![]+[])[!+[]+!+[]+!+[]]+(!+[]+[])[+[]])

javascript