Ternary Operators in JavaScript

This is just some example code I wrote for notetaking:

condition ? expression(truthy) : expression(falsy)

Example Code Snippet:

const exerciseTimeMins = 40
const message = exerciseTimeMins < 30 ? 'You need to try harder!' : 'Doing good!'

Equivalent if statement:

let message = ''

if (exerciseTimeMins < 30) {
    message = 'You need to try harder!'
}
else {
    message = 'Doing good!'
}

If you don't have an "else" statement for your ternary, you can use "null" or an empty string to indicate that the expression should do nothing if the outcome is "falsy".