array of objects in javascript – remain with the unequals only (not filter the equal ones)

The first array –

const arrOne = [1, 1, 2, 3, 4, 6, 6, 7, -7, 8, -8];

The wanted output filter by equality and oppisite equality –

[2, 3, 4]

I saw a-lot of question similar to what I want to do but they always returns the unique as well. example –

const arrOne = [1, 1, 2, 3, 4, 6, 6, 7, -7, 8, -8];

output –

[1, 2, 3, 4, 6, 7, -7, 8, -8]