What are the ways we can break out of a loop in JavaScript?

Here is a for loop:

const list = ['a', 'b', 'c']
for (let i = 0; i < list.length; i++) {

}

We can break at any point in time the execution using the break keyword:

const list = ['a', 'b', 'c']
for (let i = 0; i < list.length; i++) {
  if (list[i] === 'b') break
  console.log(list[i])
}

break also works in for..of loops:

const list = ['a', 'b', 'c']
for (const item of list) {
  if (item === 'b') break
  console.log(item)
}

And in while:

const list = ['a', 'b', 'c']
let i = 0
while (i < list.length) {
  if (i === 'b') break
  console.log(list[i])
  i++
}

The continue keyword lets us skip one iteration, in the for and for..of and while loops. The loop does end that iteration, and will continue from the next one.

A for..in loop can't use break. It's not possible to end it in this way.