js基础5 — 将十六进制颜色转为rgba()

    var colors = ['#eEE','#ffffff','#000000','#cf8','#be2626'];
    String.prototype.colorRgb = function(){
        var color = this.toLowerCase();
        var pattern = /^#([0-9|a-f]{3}|[0-9|a-f]{6})$/;
        if(color && pattern.test(color)) {
            if(color.length == 4) {
                // 将三位转换为六位
                  color = '#' + color[1] + color[1] + color[2] + color[2] + color[3] + color[3];
            }
            //处理六位的颜色值
            var colorNew = [];
            for (var i=1; i<7; i+=2) {
                colorNew.push(parseInt("0x"+color.slice(i, i+2)));  
            }
            return "RGB(" + colorNew.join(",") + ")";
        }
            return color;
    };
    var arr2 = [];
    for(var i=0; i<colors.length; i++) {
        arr2.push(colors[i].colorRgb());
    }
    console.log(arr2);