0 == ['0']['0'], 0 == ['0']['0']['0']

(0.1).toFixed(20)

!Number.POSITIVE_INFINITY, !Number.NEGATIVE_INFINITY

Infinity - Infinity, Infinity - - Infinity

null == undefined

[1, 2, 3][-1]

function f(a,b,c,d = 5,x,y,z) {}; f.length?