Answers for "js round without decimals"

math.round js 1 decimal

var number = 12.3456789;
var rounded = Math.round( number * 10 ) / 10;
// rounded is 12.3

javascript truncate decimal without rounding

// truncate function
// in this example the default value is 2
function truncate(number, index = 2) {
  	// cutting the number
    return +number.toString().slice(0, (number.toString().indexOf(".")) + (index + 1));
}

// example
console.log(truncate(1234.56789, 3)); // 1234.567