Remove duplicate values from an array in Javascript

If you want to remove all duplicate values from a javascript array or want to get the unique values array then you can use the below code.

var my_array = [5, 4, 7, 8, 9, 2, 7, 5, 4, 8, 7];

// First Method
unique_array = my_array.filter((item, index, array) => array.indexOf(item) === index);
console.log("Unique Array is : " + unique_array);

// Second Method
var another_uni_arr = [...new Set(my_array)];
console.log("Another Unique Array is : " + another_uni_arr);

In the first method, we are using Array.filter() method and checking if the item already exists in the array or not by using .indexOf() method.

Example Demo

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