(isMember ? '$2.00' : '$10.00')
isMember ? '$2.00' : '$10.00' // isMember true => output: "$2.00" // isMember false => output: "$10.00" // isMember null => output: "$10.00"
(condition ? doIfTrue : doIfFalse) //exemple : function getFee(isMember) { return (isMember ? '$2.00' : '$10.00'); } console.log(getFee(true)); // expected output: "$2.00" console.log(getFee(false)); // expected output: "$10.00" console.log(getFee(null)); // expected output: "$10.00"