Template Literals in ES6 / ES2015

The ECMAScript 2015 specification (ES6) brings us template literals for string interpolation and multiline strings. The character used to define template literals is the back-thick (`), which is located to the right of the 1 on most keyboard layouts. Here's an example of string interpolation with template literals:

function greeting(firstName, lastName) {
  let message = `Hello ${firstName} ${lastName}`;
  return message;
}

And here’s an example of a multiline string:

console.log(`Right now
  is the perfect time to
  learn JavaScript`);

And here’s yet another example of the power of string interpolation and multiline strings with template literals:

var user = { name: "Joe", email: "joe@example.com" };
var item = { quantity: 3, price: 4.99 };

var message = `Name: ${user.name}
Email: ${user.email}
-----
Total price: ${item.quantity * item.price}`;

console.log(message);

Here’s the message that will be logged to the console from the above example:

Name: Joe
Email: joe@example.com
-----
Total price: 14.97
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