SOURCE

function toThousands(num){
    return (+num || 0).toLocaleString(undefined, {minimumFractionDigits:2,maximumFractionDigits:2,})
}

console.log(toThousands(10086))
console.log(toThousands('尼玛'))
console.log(toThousands('SB001'))
console.log(toThousands(Math.PI))
console.log(toThousands(1e6))