摘要：瀏覽器檢查瀏覽器檢查瀏覽器檢查瀏覽器檢查源碼可以看這里檢測觸摸設備數據類型如果類型在對象中定義，那么當對象被選中時，它將返回。

/**
         * @property browser check browser agent
         * @property {Boolean} browser.webkit  Webkit 瀏覽器檢查
         * @property {Boolean} browser.mozilla  Mozilla 瀏覽器檢查
         * @property {Boolean} browser.msie  IE 瀏覽器檢查 */
        browser: {
            webkit: ("WebkitAppearance" in document.documentElement.style) ? true : false,
            mozilla: (typeof window.mozInnerScreenX != "undefined") ? true : false,
            msie: (window.navigator.userAgent.indexOf("Trident") != -1) ? true : false
        },

源碼可以看這里jui-chart core.js

        /**
         * @property {Boolean} isTouch
         * check touch device
         */
        isTouch: /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(window.navigator.userAgent)

/**
         * @method typeCheck
         * check data  type
         * @param {String} t  type string
         * @param {Object} v value object
         * @return {Boolean}
         */
        typeCheck: function (t, v) {
            function check(type, value) {
                if (typeof(type) != "string") return false;

                if (type == "string") {
                    return (typeof(value) == "string");
                }
                else if (type == "integer") {
                    return (typeof(value) == "number" && value % 1 == 0);
                }
                else if (type == "float") {
                    return (typeof(value) == "number" && value % 1 != 0);
                }
                else if (type == "number") {
                    return (typeof(value) == "number");
                }
                else if (type == "boolean") {
                    return (typeof(value) == "boolean");
                }
                else if (type == "undefined") {
                    return (typeof(value) == "undefined");
                }
                else if (type == "null") {
                    return (value === null);
                }
                else if (type == "array") {
                    return (value instanceof Array);
                }
                else if (type == "date") {
                    return (value instanceof Date);
                }
                else if (type == "function") {
                    return (typeof(value) == "function");
                }
                else if (type == "object") {
                    // typeCheck如果類型在對象中定義，那么當對象被選中時，它將返回false。 (date, array, null)
                    return (
                    typeof(value) == "object" &&
                    value !== null && !(value instanceof Array) && !(value instanceof Date) && !(value instanceof RegExp)
                    );
                }

                return false;
            }

            if (typeof(t) == "object" && t.length) {
                var typeList = t;

                for (var i = 0; i < typeList.length; i++) {
                    if (check(typeList[i], v)) return true;
                }

                return false;
            } else {
                return check(t, v);
            }
        }

jui

export function bytesToSize(value) {
  if (+value === 0) return "0 B"
  let k = 1024,
    sizes = ["B", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"],
    i = Math.floor(Math.log(value)/Math.log(k))
  return (value / Math.pow(k, i)).toPrecision(3) + " "+ sizes[i]  
}