There are many ways to remove duplicates from an array in Javascript, but ES6 specifically offers some interesting and functional methods for doing so.
const array = ["my", "array", "my", "array", "elements", "array"];
// Using filter
array.filter((item, index) => array.indexOf(item) === index);
// Using reduce
array.reduce((accum, item) => accum.includes(item) ? accum : [...accum, item], []);
// Using Set
[...new Set(array)];