javascript 總結（常用工具類的封裝）
阿新 • • 發佈：2018-12-08
**
JavaScript
**
1. type 型別判斷
isString (o) { //是否字串
return Object.prototype.toString.call(o).slice(8, -1) === 'String'
}
isNumber (o) { //是否數字
return Object.prototype.toString.call(o).slice(8, -1) === 'Number'
}
isObj (o) { //是否物件
return Object.prototype.toString.call(o).slice(8, -1) === 'Object' 2. Date
/**
* 格式化時間
*
* @param {time} 時間
* @param {cFormat} 格式
* @return {String} 字串
*
* @example formatTime('2018-1-29', '{y}/{m}/{d} {h}:{i}:{s}') // -> 2018/01/29 00:00:00
*/
formatTime(time, cFormat) {
if (arguments.length === 0) return null
if ((time + '').length === 10) {
time = +time * 1000
}
var format = cFormat || '{y}-{m}-{d} {h}:{i}:{s}', date
if (typeof time === 'object') {
date = time
} else {
date = new Date(time)
}
var formatObj = {
y: date.getFullYear(),
m: date.getMonth() + 1,
d: date.getDate(),
h: date.getHours(),
i: date.getMinutes(),
s: date.getSeconds(),
a: date.getDay()
}
var time_str = format.replace(/{(y|m|d|h|i|s|a)+}/g, (result, key) => {
var value = formatObj[key]
if (key === 'a') return ['一', '二', '三', '四', '五', '六', '日'][value - 1]
if (result.length > 0 && value < 10) {
value = '0' + value
}
return value || 0
})
return time_str
}
/**
* 返回指定長度的月份集合
*
* @param {time} 時間
* @param {len} 長度
* @param {direction} 方向： 1: 前幾個月; 2: 後幾個月; 3:前後幾個月 預設 3
* @return {Array} 陣列
*
* @example getMonths('2018-1-29', 6, 1) // -> ["2018-1", "2017-12", "2017-11", "2017-10", "2017-9", "2017-8", "2017-7"]
*/
getMonths(time, len, direction) {
var mm = new Date(time).getMonth(),
yy = new Date(time).getFullYear(),
direction = isNaN(direction) ? 3 : direction,
index = mm;
var cutMonth = function(index) {
if ( index <= len && index >= -len) {
return direction === 1 ? formatPre(index).concat(cutMonth(++index)):
direction === 2 ? formatNext(index).concat(cutMonth(++index)):formatCurr(index).concat(cutMonth(++index))
}
return []
}
var formatNext = function(i) {
var y = Math.floor(i/12),
m = i%12
return [yy+y + '-' + (m+1)]
}
var formatPre = function(i) {
var y = Math.ceil(i/12),
m = i%12
m = m===0 ? 12 : m
return [yy-y + '-' + (13 - m)]
}
var formatCurr = function(i) {
var y = Math.floor(i/12),
yNext = Math.ceil(i/12),
m = i%12,
mNext = m===0 ? 12 : m
return [yy-yNext + '-' + (13 - mNext),yy+y + '-' + (m+1)]
}
// 陣列去重
var unique = function(arr) {
if ( Array.hasOwnProperty('from') ) {
return Array.from(new Set(arr));
}else{
var n = {},r=[];
for(var i = 0; i < arr.length; i++){
if (!n[arr[i]]){
n[arr[i]] = true;
r.push(arr[i]);
}
}
return r;
}
}
return direction !== 3 ? cutMonth(index) : unique(cutMonth(index).sort(function(t1, t2){
return new Date(t1).getTime() - new Date(t2).getTime()
}))
}
/**
* 返回指定長度的天數集合
*
* @param {time} 時間
* @param {len} 長度
* @param {direction} 方向： 1: 前幾天; 2: 後幾天; 3:前後幾天 預設 3
* @return {Array} 陣列
*
* @example date.getDays('2018-1-29', 6) // -> ["2018-1-26", "2018-1-27", "2018-1-28", "2018-1-29", "2018-1-30", "2018-1-31", "2018-2-1"]
*/
getDays(time, len, diretion) {
var tt = new Date(time)
var getDay = function(day) {
var t = new Date(time)
t.setDate(t.getDate() + day)
var m = t.getMonth()+1
return t.getFullYear()+'-'+m+'-'+t.getDate()
}
var arr = []
if (diretion === 1) {
for (var i = 1; i <= len; i++) {
arr.unshift(getDay(-i))
}
}else if(diretion === 2) {
for (var i = 1; i <= len; i++) {
arr.push(getDay(i))
}
}else {
for (var i = 1; i <= len; i++) {
arr.unshift(getDay(-i))
}
arr.push(tt.getFullYear()+'-'+(tt.getMonth()+1)+'-'+tt.getDate())
for (var i = 1; i <= len; i++) {
arr.push(getDay(i))
}
}
return diretion === 1 ? arr.concat([tt.getFullYear()+'-'+(tt.getMonth()+1)+'-'+tt.getDate()]) :
diretion === 2 ? [tt.getFullYear()+'-'+(tt.getMonth()+1)+'-'+tt.getDate()].concat(arr) : arr
}
/**
* @param {s} 秒數
* @return {String} 字串
*
* @example formatHMS(3610) // -> 1h0m10s
*/
formatHMS (s) {
var str = ''
if (s > 3600) {
str = Math.floor(s/3600)+'h'+Math.floor(s%3600/60)+'m'+s%60+'s'
}else if(s > 60) {
str = Math.floor(s/60)+'m'+s%60+'s'
}else{
str = s%60+'s'
}
return str
}
/*獲取某月有多少天*/
getMonthOfDay (time) {
var date = new Date(time)
var year = date.getFullYear()
var mouth = date.getMonth() + 1
var days
//當月份為二月時，根據閏年還是非閏年判斷天數
if (mouth == 2) {
days = year % 4 == 0 ? 29 : 28
} else if (mouth == 1 || mouth == 3 || mouth == 5 || mouth == 7 || mouth == 8 || mouth == 10 || mouth == 12) {
//月份為：1,3,5,7,8,10,12 時，為大月.則天數為31；
days = 31
} else {
//其他月份，天數為：30.
days = 30
}
return days
}
/*獲取某年有多少天*/
getYearOfDay (time) {
var firstDayYear = this.getFirstDayOfYear(time);
var lastDayYear = this.getLastDayOfYear(time);
var numSecond = (new Date(lastDayYear).getTime() - new Date(firstDayYear).getTime())/1000;
return Math.ceil(numSecond/(24*3600));
}
/*獲取某年的第一天*/
getFirstDayOfYear (time) {
var year = new Date(time).getFullYear();
return year + "-01-01 00:00:00";
}
/*獲取某年最後一天*/
getLastDayOfYear (time) {
var year = new Date(time).getFullYear();
var dateString = year + "-12-01 00:00:00";
var endDay = this.getMonthOfDay(dateString);
return year + "-12-" + endDay + " 23:59:59";
}
/*獲取某個日期是當年中的第幾天*/
getDayOfYear (time) {
var firstDayYear = this.getFirstDayOfYear(time);
var numSecond = (new Date(time).getTime() - new Date(firstDayYear).getTime())/1000;
return Math.ceil(numSecond/(24*3600));
}
/*獲取某個日期在這一年的第幾周*/
getDayOfYearWeek (time) {
var numdays = this.getDayOfYear(time);
return Math.ceil(numdays / 7);
}3. Array
/*判斷一個元素是否在陣列中*/
contains (arr, val) {
return arr.indexOf(val) != -1 ? true : false;
}
/**
* @param {arr} 陣列
* @param {fn} 回撥函式
* @return {undefined}
*/
each (arr, fn) {
fn = fn || Function;
var a = [];
var args = Array.prototype.slice.call(arguments, 1);
for(var i = 0; i < arr.length; i++) {
var res = fn.apply(arr, [arr[i], i].concat(args));
if(res != null) a.push(res);
}
}
/**
* @param {arr} 陣列
* @param {fn} 回撥函式
* @param {thisObj} this指向
* @return {Array}
*/
map (arr, fn, thisObj) {
var scope = thisObj || window;
var a = [];
for(var i = 0, j = arr.length; i < j; ++i) {
var res = fn.call(scope, arr[i], i, this);
if(res != null) a.push(res);
}
return a;
}
/**
* @param {arr} 陣列
* @param {type} 1：從小到大 2：從大到小 3：隨機
* @return {Array}
*/
sort (arr, type = 1) {
return arr.sort( (a, b) => {
switch(type) {
case 1:
return a - b;
case 2:
return b - a;
case 3:
return Math.random() - 0.5;
default:
return arr;
}
})
}
/*去重*/
unique (arr) {
if ( Array.hasOwnProperty('from') ) {
return Array.from(new Set(arr));
}else{
var n = {},r=[];
for(var i = 0; i < arr.length; i++){
if (!n[arr[i]]){
n[arr[i]] = true;
r.push(arr[i]);
}
}
return r;
}
}
/*求兩個集合的並集*/
union (a, b) {
var newArr = a.concat(b);
return this.unique(newArr);
}
/*求兩個集合的交集*/
intersect (a, b) {
var _this = this;
a = this.unique(a);
return this.map(a, function(o) {
return _this.contains(b, o) ? o : null;
});
}
/*刪除其中一個元素*/
remove (arr, ele) {
var index = arr.indexOf(ele);
if(index > -1) {
arr.splice(index, 1);
}
return arr;
}
/*將類陣列轉換為陣列的方法*/
formArray (ary) {
var arr = [];
if(Array.isArray(ary)) {
arr = ary;
} else {
arr = Array.prototype.slice.call(ary);
};
return arr;
}
/*最大值*/
max (arr) {
return Math.max.apply(null, arr);
}
/*最小值*/
min (arr) {
return Math.min.apply(null, arr);
}
/*求和*/
sum (arr) {
return arr.reduce( (pre, cur) => {
return pre + cur
})
}
/*平均值*/
average (arr) {
return this.sum(arr)/arr.length
}4. String 字串操作
/**
* 去除空格
* @param {str}
* @param {type}
* type: 1-所有空格 2-前後空格 3-前空格 4-後空格
* @return {String}
*/
trim (str, type) {
type = type || 1
switch (type) {
case 1:
return str.replace(/\s+/g, "");
case 2:
return str.replace(/(^\s*)|(\s*$)/g, "");
case 3:
return str.replace(/(^\s*)/g, "");
case 4:
return str.replace(/(\s*$)/g, "");
default:
return str;
}
}
/**
* @param {str}
* @param {type}
* type: 1:首字母大寫 2：首頁母小寫 3：大小寫轉換 4：全部大寫 5：全部小寫
* @return {String}
*/
changeCase (str, type) {
type = type || 4
switch (type) {
case 1:
return str.replace(/\b\w+\b/g, function (word) {
return word.substring(0, 1).toUpperCase() + word.substring(1).toLowerCase();
});
case 2:
return str.replace(/\b\w+\b/g, function (word) {
return word.substring(0, 1).toLowerCase() + word.substring(1).toUpperCase();
});
case 3:
return str.split('').map( function(word){
if (/[a-z]/.test(word)) {
return word.toUpperCase();
}else{
return word.toLowerCase()
}
}).join('')
case 4:
return str.toUpperCase();
case 5:
return str.toLowerCase();
default:
return str;
}
}
/*
檢測密碼強度
*/
checkPwd (str) {
var Lv = 0;
if (str.length < 6) {
return Lv
}
if (/[0-9]/.test(str)) {
Lv++
}
if (/[a-z]/.test(str)) {
Lv++
}
if (/[A-Z]/.test(str)) {
Lv++
}
if (/[\.|-|_]/.test(str)) {
Lv++
}
return Lv;
}
/*過濾html程式碼(把<>轉換)*/
filterTag (str) {
str = str.replace(/&/ig, "&");
str = str.replace(/</ig, "<");
str = str.replace(/>/ig, ">");
str = str.replace(" ", " ");
return str;
}5. Number
/*隨機數範圍*/
random (min, max) {
if (arguments.length === 2) {
return Math.floor(min + Math.random() * ( (max+1) - min ))
}else{
return null;
}
}
/*將阿拉伯數字翻譯成中文的大寫數字*/
numberToChinese (num) {
var AA = new Array("零", "一", "二", "三", "四", "五", "六", "七", "八", "九", "十");
var BB = new Array("", "十", "百", "仟", "萬", "億", "點", "");
var a = ("" + num).replace(/(^0*)/g, "").split("."),
k = 0,
re = "";
for(var i = a[0].length - 1; i >= 0; i--) {
switch(k) {
case 0:
re = BB[7] + re;
break;
case 4:
if(!new RegExp("0{4}//d{" + (a[0].length - i - 1) + "}$")
.test(a[0]))
re = BB[4] + re;
break;
case 8:
re = BB[5] + re;
BB[7] = BB[5];
k = 0;
break;
}
if(k % 4 == 2 && a[0].charAt(i + 2) != 0 && a[0].charAt(i + 1) == 0)
re = AA[0] + re;
if(a[0].charAt(i) != 0)
re = AA[a[0].charAt(i)] + BB[k % 4] + re;
k++;
}
if(a.length > 1) // 加上小數部分(如果有小數部分)
{
re += BB[6];
for(var i = 0; i < a[1].length; i++)
re += AA[a[1].charAt(i)];
}
if(re == '一十')
re = "十";
if(re.match(/^一/) && re.length == 3)
re = re.replace("一", "");
return re;
}
/*將數字轉換為大寫金額*/
changeToChinese (Num) {
//判斷如果傳遞進來的不是字元的話轉換為字元
if(typeof Num == "number") {
Num = new String(Num);
};
Num = Num.replace(/,/g, "") //替換tomoney()中的“,”
Num = Num.replace(/ /g, "") //替換tomoney()中的空格
Num = Num.replace(/￥/g, "") //替換掉可能出現的￥字元
if(isNaN(Num)) { //驗證輸入的字元是否為數字
//alert("請檢查小寫金額是否正確");
return "";
};
//字元處理完畢後開始轉換，採用前後兩部分分別轉換
var part = String(Num).split(".");
var newchar = "";
//小數點前進行轉化
for(var i = part[0].length - 1; i >= 0; i--) {
if(part[0].length > 10) {
return "";
//若數量超過拾億單位，提示
}
var tmpnewchar = ""
var perchar = part[0].charAt(i);
switch(perchar) {
case "0":
tmpnewchar = "零" + tmpnewchar;
break;
case "1":
tmpnewchar = "壹" + tmpnewchar;
break;
case "2":
tmpnewchar = "貳" + tmpnewchar;
break;
case "3":
tmpnewchar = "叄" + tmpnewchar;
break;
case "4":
tmpnewchar = "肆" + tmpnewchar;
break;
case "5":
tmpnewchar = "伍" + tmpnewchar;
break;
case "6":
tmpnewchar = "陸" + tmpnewchar;
break;
case "7":
tmpnewchar = "柒" + tmpnewchar;
break;
case "8":
tmpnewchar = "捌" + tmpnewchar;
break;
case "9":
tmpnewchar = "玖" + tmpnewchar;
break;
}
switch(part[0].length - i - 1) {
case 0:
tmpnewchar = tmpnewchar + "元";
break;
case 1:
if(perchar != 0) tmpnewchar = tmpnewchar + "拾";
break;
case 2:
if(perchar != 0) tmpnewchar = tmpnewchar + "佰";
break;
case 3:
if(perchar != 0) tmpnewchar = tmpnewchar + "仟";
break;
case 4:
tmpnewchar = tmpnewchar + "萬";
break;
case 5:
if(perchar != 0) tmpnewchar = tmpnewchar + "拾";
break;
case 6:
if(perchar != 0) tmpnewchar = tmpnewchar + "佰";
break;
case 7:
if(perchar != 0) tmpnewchar = tmpnewchar + "仟";
break;
case 8:
tmpnewchar = tmpnewchar + "億";
break;
case 9:
tmpnewchar = tmpnewchar + "拾";
break;
}
var newchar = tmpnewchar + newchar;
}
//小數點之後進行轉化
if(Num.indexOf(".") != -1) {
if(part[1].length > 2) {
// alert("小數點之後只能保留兩位,系統將自動截斷");
part[1] = part[1].substr(0, 2)
}
for(i = 0; i < part[1].length; i++) {
tmpnewchar = ""
perchar = part[1].charAt(i)
switch(perchar) {
case "0":
tmpnewchar = "零" + tmpnewchar;
break;
case "1":
tmpnewchar = "壹" + tmpnewchar;
break;
case "2":
tmpnewchar = "貳" + tmpnewchar;
break;
case "3":
tmpnewchar = "叄" + tmpnewchar;
break;
case "4":
tmpnewchar = "肆" + tmpnewchar;
break;
case "5":
tmpnewchar = "伍" + tmpnewchar;
break;
case "6":
tmpnewchar = "陸" + tmpnewchar;
break;
case "7":
tmpnewchar = "柒" + tmpnewchar;
break;
case "8":
tmpnewchar = "捌" + tmpnewchar;
break;
case "9":
tmpnewchar = "玖" + tmpnewchar;
break;
}
if(i == 0) tmpnewchar = tmpnewchar + "角";
if(i == 1) tmpnewchar = tmpnewchar + "分";