JS Math.random()生成随機色

RGB生成随機顔色

function createColor() {
        var r = Math.floor(Math.random() * 255);
        var g = Math.floor(Math.random() * 255);
        var b = Math.floor(Math.random() * 255);
        return "rgb(" + r + "," + g + "," + b + ")";
    }
           

生成十六進制的顔色值 #000000

function createColor2() {
           return "#" + function (color) {
               return new Array(7 - color.length).join("0") + color;//不夠六位則在前面補0
           }((Math.random() * 0x1000000 << 0).toString(16));
       }