JAVASCRIPT

conditional (ternary) operator function parameter

serveDrink(userIsYoungerThan4 ? 'Milk' : userIsYoungerThan21 ? 'Grape Juice' : 'Wine');

Use the Conditional (Ternary) Operator

function checkEqual(a, b)
{
return a === b ? “Equal” : “Not Equal” ;
}
checkEqual(1, 2);

conditional (ternary) operator function parameter

//Instead of:
var welcomeMessage  = 'Hello ' + (username ? username : 'guest');

//Can use:
var welcomeMessage  = 'Hello ' + (username || 'guest');

Conditional ternary operator

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"