Rediscovering JavaScript: ES6, ES7 & ES8/

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Solution Review: Place Order

Solution Review: Place Order

Now, let's discuss the solution to the "Place Order" challenge.

We'll cover the following...

Task 1

Let’s discuss the solution to the challenge presented in the previous lesson.

Solution

const placeOrder = function(id, amount, shipping = (amount < 20 ? 5 : 10),
  date = new Date()) {
  console.log(' shipping charge for id: ' +
    id + ' is $' + shipping + ' Date:' + date.getDate());
};
//shipping, if not given, is $5 if amount less than 20 else $10
//date is today's date unless given
placeOrder(1,12.10, 3, new Date('05/15/2018')); 
placeOrder(1,25.20, 10);
placeOrder(1,12.05);
placeOrder(1,25.30);
placeOrder(1,25.20);

Explanation

  • In line 1, the ternary operator is used to check the condition if the amount is less than 20 or not. Here, the default value of shipping depends on the ...