/*
  原生的保留小数有问题
*/
export function formatAbsNum(num: string | number, n: number = 2): string {
  const abs: string = Number(num).toFixed(n + 1);
  return abs.slice(0, abs.length - 1);
}


export function colorRgb (color: string, opacity: number = 1) {
  // 16进制颜色值的正则
  var reg = /^#([0-9a-fA-f]{3}|[0-9a-fA-f]{6})$/;
  // 把颜色值变成小写
  color = color.toLowerCase();
  if (reg.test(color)) {
    // 如果只有三位的值，需变成六位，如：#fff => #ffffff
    if (color.length === 4) {
      var colorNew = "#";
      for (var i = 1; i < 4; i += 1) {
        colorNew += color.slice(i, i + 1).concat(color.slice(i, i + 1));
      }
      color = colorNew;
    }
    // 处理六位的颜色值，转为RGB
    var colorChange = [];
    for (var i = 1; i < 7; i += 2) {
      colorChange.push(parseInt("0x" + color.slice(i, i + 2)));
    }
    colorChange.push(opacity);
    return "rgba(" + colorChange.join(",") + ")";
  }
  return color;
}