Apply formatting of cents `on:blur` when the value doesn't have any cents

 If you just enter a whole number or just to the tenths -- it leaves it without formatting it with the cents.  I did it really kludgey by 
 let fd=0
const setF = () => {
        fd=2
        setFormattedValue()
        fd=0
    }

and changed 
formattedValue = isZero ? '' : formatCurrency(value, fractionDigits, fd);

and then [
(on:blur={setF})

I am sure there is a better way