We can simplify an if...else statement using a ternary operator.

Consider the following example:

let batteryLevel = 0.02

if (batteryLevel < 0.01) {
  console.log("Activate battery saving mode.")
} else {
  console.log("Do not activate battery saving mode.")
}

// Do not activate battery saving mode.

We can use a ternary operator to perform the same functionality:

let batteryLevel = 0.02

batteryLevel < 0.01
  ? console.log("Activate the battery saving mode.")
  : console.log("Do not activate the battery saving mode.")

// Do not activate the battery saving mode.

In the example above:

• The condition batteryLevel < 0.01 is provided before the ?.
• Two expressions follow the ? and are separated by a colon :.
• If the condition evaluates to true, the first expression executes.
• If the condition evaluates to false, the second expression executes.

Like if...else statements, ternary operators can be used for conditions which evaluate to true or false.