javascript - 向上取整 0.10

Question

我需要四舍五入到最接近的 0.10，最小为 2.80

 var panel;
 if (routeNodes.length > 0 && (panel = document.getElementById('distance')))   
 {              
   panel.innerHTML = (dist/1609.344).toFixed(2) + " miles = £" + (((dist/1609.344 - 1) * 1.20) + 2.80).toFixed(2); 
 }

任何帮助，将不胜感激

Answer 1

var number = 123.123;

Math.max( Math.round(number * 10) / 10, 2.8 ).toFixed(2);