Check if a value has self equality
npm install has-self-equalityjavascript
const assert = require('assert-fn')
const hasSelfEquality = require('has-self-equality')
const ERROR_MESSAGE = 'this error will never be shown'
assert(hasSelfEquality(2))
assert(hasSelfEquality(undefined))
assert(hasSelfEquality(null))
assert(hasSelfEquality(false))
assert(!hasSelfEquality(NaN))
``