how to use roundto in javascript object code example

Example 1: round to nearest decimal javascript

function round(value, precision) {
    var multiplier = Math.pow(10, precision || 0);
    return Math.round(value * multiplier) / multiplier;
}

Example 2: round to nearest decimal javascript

round(12345.6789, -1) // 12350
round(12345.6789, -2) // 12300