Using Lodash:

_.last(array)

Your fastest options will be either:

array[array.length - 1]

Or the slice() method:

array.slice(-1)[0]

The fastest methods:

array[array.length - 1]

array.slice(-1)[0]

Other methods:

Pop():

array.pop()

[...array].pop()

reduceRight():

array.reduceRight(a => a)

splice():

let [last] = array.splice(-1)

reverse():

array.reverse()[0]

Lodash:

_.last(array)

jQuery:

$(array).get(-1)

Mozilla wrote their Servo browser engine with Rust.

Try this:

{
  [...Array(5)].map((item, index) => {
    return (
      <div key={index}>
        <span>My Element</span>
      </div>
    )
  })
}

This will render the div 5 times. Replace 5 in that code with whatever count you want.