摘要：限制數(shù)字且最多輸入小數(shù)的位數(shù)輸入的對象輸入長度最后一個字符是如果符號超過一個存在符號并且不止一位數(shù)注在調(diào)用的時候需要用原生來綁定對象日期轉(zhuǎn)換函數(shù)，可以根據(jù)需求來設(shè)置前幾天后幾天或或或或單位自動轉(zhuǎn)換單位

/**
 * 限制數(shù)字且最多輸入小數(shù)的位數(shù)
 * @param  {[type]} elem 輸入的對象
 * @param  {[type]} len  輸入長度
 * @return {[type]}      [description]
 */
function limitNumber(elem, len) {
    elem.addEventListener("input",function(e){
        var result = "";
        var val = e.target.value;
        //最后一個字符是.
        if (val[val.length - 1] === ".") {
            //如果.符號超過一個
            if (val.split(".").length > 2) {
                val = val.slice(0, -1);
            } else if (val.split(".").length === 2 && val.slice(val.indexOf("."), val.length - 1).length > 2) {
                val = val.slice(0, val.indexOf(".") + 2)
            }
        }
        //存在.符號并且不止一位數(shù)
        else if (val[val.length - 1] !== "." && val.indexOf(".") !== -1) {
            val = val.slice(0, val.indexOf(".") + (len || 2 + 1))
        }
        e.target.value = val.replace(/[^d.]/g, "");
    })
}

注：在調(diào)用的時候需要用原生來綁定對象

日期轉(zhuǎn)換函數(shù)，可以根據(jù)需求來設(shè)置前幾天后幾天

Date.prototype.format = function(pattern) {
    function zeroize(num) {
        return num < 10 ? "0" + num : num;
    };
    var pattern = pattern; //    YYYY-MM-DD 或 MM-DD-YYYY 或 YYYY-MM-DD , hh : mm : ss
    var dateObj = {
        "Y": this.getFullYear(),
        "M": zeroize(this.getMonth() + 1),
        "D": zeroize(this.getDate()),
        "h": zeroize(this.getHours()),
        "m": zeroize(this.getMinutes()),
        "s": zeroize(this.getSeconds())
    };
    return pattern.replace(/YYYY|MM|DD|hh|mm|ss/g, function(match) {
        switch (match) {
            case "YYYY":
                return dateObj.Y;
            case "MM":
                return dateObj.M;
            case "DD":
                return dateObj.D;
            case "hh":
                return dateObj.h;
            case "mm":
                return dateObj.m;
            case "ss":
                return dateObj.s;
        };
    });
};
Date.prototype.past = function(pattern, pastDays) {
    function zeroize(num) {
        return num < 10 ? "0" + num : num;
    };
    var pastday = new Date((this - 0) - 1000 * 60 * 60 * 24 * pastDays);
    var pattern = pattern; //    YYYY-MM-DD 或 MM-DD-YYYY 或 YYYY-MM-DD , hh : mm : ss
    var dateObj = {
        "Y": pastday.getFullYear(),
        "M": zeroize(pastday.getMonth() + 1),
        "D": zeroize(pastday.getDate()),
        "h": zeroize(pastday.getHours()),
        "m": zeroize(pastday.getMinutes()),
        "s": zeroize(pastday.getSeconds())
    };
    return pattern.replace(/YYYY|MM|DD|hh|mm|ss/g, function(match) {
        switch (match) {
            case "YYYY":
                return dateObj.Y;
            case "MM":
                return dateObj.M;
            case "DD":
                return dateObj.D;
            case "hh":
                return dateObj.h;
            case "mm":
                return dateObj.m;
            case "ss":
                return dateObj.s;
        };
    });
};
Date.prototype.yestoday = function(pattern) {
    return this.past(pattern, 1);
};
Date.prototype.tomorrow = function(pattern) {
    return this.past(pattern, -1);
};

單位自動轉(zhuǎn)換

function getKit(array,radix,units){
        var result = [];

        //單位轉(zhuǎn)換
        function getUnit(array){
            var temp = {};
            var unit = ["byte","KB","MB","GB","TB"];

            //存儲所有配置單位的最大值
            function max(){
                var str=[];
                for(var i=1;i array ){
                    temp.num=(array / Math.pow(radix,i)).toFixed(2),
                    temp.unit = unit[i];
                    break;
                }
            }
            return temp;
        }
        for(var i=0;i