To remove empty elements from an array in JavaScript, we call the filter method.
For instance, we write
const arr = [1, 2, , 3, , -3, null, , 0, , undefined, 4, , 4, , 5, , 6, , , ,];
const filtered = arr.filter(Boolean);
to call arr.filter with Boolean to return an array with all the falsy values removed.
