<\/span><\/h2>\n\n\n\nIn this solution, we first convert the array into a set. By definition, a set can have only unique items. Therefore this operation automatically drops all duplicate items. Then we convert this set into an array, using spread operator ‘…’ and array constructor.<\/p>\n\n\n\n
a = [1, 2, 2, 3];
b = new Set(a);
a = [...b];
console.log(a); \/\/ output is [1, 2, 3]<\/pre>\n\n\n\nIn the above code, if do not prefix the set with spread operator, then it will not unpack the items of the set before storing them into an array. Here is what happens if you do not use spread operator above.<\/p>\n\n\n\n
a = [1, 2, 2, 3];
b = new Set(a);
a = [b];
console.log(a); \/\/ output is [ Set(3) { 1, 2, 3 } ]<\/pre>\n\n\n\nYou can also use Array() constructor to create array from set. You will get the same output.<\/p>\n\n\n\n
a = [1, 2, 2, 3];
b = new Set(a);
a = Array(...b);
console.log(a); \/\/ output is [1, 2, 3]<\/pre>\n\n\n\nThis is the most convenient and recommended way to get unique values from JavaScript array.<\/p>\n\n\n\n