Pick Random Array Item in JavaScript

This simple JavaScript snippet accepts an array and returns a random item from it, using the good old Math.random method:

const randomItem = (arr) => {
    return arr[Math.floor(Math.random() * arr.length)];
};

To use it, just pass in an array:

const arr = [`dog`, `cat`, `bird`, `fish`, `dinosaur`];

const item = randomItem(arr);

After the code in the above snippet has executed, item will equal one of the strings from arr.

And I’ll leave you with a one-liner variant of randomItem with the same functionality:

const randomItem = (arr) => arr[Math.floor(Math.random() * arr.length)];

Conclusion

Anyway, that’s all you need to start randomly picking items from your JavaScript arrays. Enjoy!