Format number to always show 2 decimal places

Question

I would like to format my numbers to always display 2 decimal places, rounding where applicable.

Examples:

number     display
------     -------
1            


        

Answer 1

For the most accurate rounding, create this function:

function round(value, decimals) {
    return Number(Math.round(value +'e'+ decimals) +'e-'+ decimals).toFixed(decimals);
}

and use it to round to 2 decimal places:

console.log("seeked to " + round(1.005, 2));
> 1.01

Thanks to Razu, this article, and MDN's Math.round reference.