深拷贝:
function deepCopyFn(obj1) {var obj2 = Array.isArray(obj1) ? [] : {};
if (obj1 && typeof obj1 === "object") {for (var i in obj1) {var prop = obj1[i]; // 防止互相援用造成死循环,如 obj1.a=obj
if (prop == obj1) {continue;}
if (obj1.hasOwnProperty(i)) {
// 如果子属性为援用数据类型,递归复制
if (prop && typeof prop === "object") {obj2[i] = (prop.constructor === Array) ? [] : {};
arguments.callee(prop, obj2[i]); // 递归调用
} else {
// 如果是根本数据类型,只是简略的复制
obj2[i] = prop;
}
}
}
}
return obj2;
}
日期工夫:
计算日期:
/**
* @param{DateString} -- date_str, 日期字符串,例如: 2019-01-01
* @param{Number} -- day 日期计算,相差多少天。*/
function getDateByDiffAndDateFn(date_str, day = 0) {let current_date = date_str ? new Date(date_str).getTime() : new Date().getTime();
let date = new Date(current_date + day * 3600000 * 24),
year = date.getFullYear(),
month = ("00" + (date.getMonth() + 1)).slice(-2),
days = ("00" + date.getDate()).slice(-2);
return `${year}-${month}-${days}`;
}
判断是否为平年:
/**
* 判断是否是平年
* @param{Number} -- year
*/
function isLeapYear(year) {return year % 4 == 0 && year % 100 != 0 || year % 400 == 0;}
验证字符串是否为日期字符串:
/**
* @param{String|Object} -- date 验证字符串是否为 日期字符串
*/
function checkDateString(date) {
/**
* date_str_regexp 匹配
*/
let date_str_regexp =/^[0-9]{4}(-[0-9]{2}){2}|(:[0-9]{2}){2}|(\/[0-9]{2}){2}$/;
if (!date_str_regexp.test(date)) {console.error("[Error] checkDateString 谬误传参, 请传入正确的日期字符串,例如:'2019-01-01'、'2019:01:01'、2019/01/01'。");
return false;
}
// let date_str = arg.replace(/:|\//, "-"),
let date_arr = date.split(/-|:|\//);
let thirty_one = [1, 3, 5, 7, 8, 10, 12],
thirty = [4, 6, 9, 11];
switch(true) {case +date_arr[1] > 12 || +date_arr <= 0:
console.error("[Error] checkDateString 谬误传参, 月份范畴为 1 ~ 12");
return false;
case +date_arr[1] == 2 && isLeapYear(date_arr[0]) && (+date_arr[2] > 29 || +date_arr[2] <= 0):
console.error(`[Error] checkDateString 谬误传参, 请填写存在的日期工夫,${date_arr[0]}-${date_arr[1]} 为平年, 日期的抉择范畴为 1 ~ 29`);
return false;
case +date_arr[1] == 2 && !isLeapYear(date_arr[0]) && (+date_arr[2] > 28 || +date_arr[2] <= 0):
console.error(`[Error] checkDateString 谬误传参, 请填写存在的日期工夫,${date_arr[0]}-${date_arr[1]} 为平年, 日期的抉择范畴为 1 ~ 28`);
return false;
case thirty_one.includes(+date_arr[1]) && (+date_arr[2] > 31 || +date_arr[2] <= 0):
console.error(`[Error] checkDateString 谬误传参, 请填写存在的日期工夫,${date_arr[0]}-${date_arr[1]}, 日期的抉择范畴为 1 ~ 31`);
return false;
case thirty.includes(+date_arr[1]) && (+date_arr[2] > 30 || +date_arr[2] <= 0):
console.error(`[Error] checkDateString 谬误传参, 请填写存在的日期工夫,${date_arr[0]}-${date_arr[1]}, 日期的抉择范畴为 1 ~ 30`);
return false;
default: return true;
}
}
获取日期所在的周:
/**
* 依据日期获取它所在的周的日期范畴
* @param{Object | String} -- arg
*/
function getWeeksByDate (arg) {let date = new Date(),
year = date.getFullYear(),
month = ("00" + (date.getMonth() + 1)).slice(-2),
days = ("00" + date.getDate()).slice(-2),
current_date = `${year}-${month}-${days}`;
let default_config = {
date: current_date, // 默认为以后日期
start_monday: true, // 是否按星期一为一个星期的开始工夫,默认为 true,按星期一 到 星期日, false 就按星期日到星期六
return_all: false // 返回这周所有日期
};
switch(Object.prototype.toString.call(arg)) {// case '[object Date]': break;
case '[object Object]':
if (arg.date && !checkDateString(arg.date)) {return false;}
arg.date = arg.date.replace(/:|\//, "-");
default_config = Object.assign(default_config, arg);
break;
case '[object String]':
if (!checkDateString(arg)) {return false;}
default_config.date = arg.replace(/:|\//, "-");
break;
default: {console.error("[Error] getWeeksByDate 谬误传参!");
return false;
}
}
let start_num = 0;
week_day = new Date(default_config.date).getDay();
if (default_config.start_monday && week_day == 0) {start_num = -6;} else if (default_config.start_monday) {start_num = -week_day + 1;} else {start_num = -week_day;}
let start_date = getDateByDiffAndDate(default_config.date, start_num);
end_date = getDateByDiffAndDate(start_date, 6);
let hebdomad = Array.from({length: 7}, (_item, i) => getDateByDiffAndDate(start_date, i));
let hebdomadWithWeek = hebdomad.map((item) => {let week = new Date(item).getDay();
let weekChinese = "";
switch (week) {
case 0: weekChinese = "星期日"; break;
case 1: weekChinese = "星期一"; break;
case 2: weekChinese = "星期二"; break;
case 3: weekChinese = "星期三"; break;
case 4: weekChinese = "星期四"; break;
case 5: weekChinese = "星期五"; break;
case 6: weekChinese = "星期六"; break;
}
return {
date: item,
week: weekChinese
}
});
// 返回后果
let result = {
start_date: start_date,
end_date: end_date,
hebdomad: hebdomad,
hebdomadWithWeek: hebdomadWithWeek
};
if (default_config.return_all) {result.weeks = [start_date];
for (let i = 1; i < 7; i++) {result.weeks.push(getDateByDiffAndDate(i, start_date));
}
}
return result;
}
获取 输出年份 以及 将来或过来 几年:
/**
* @param {string|number} year - example: 2020
* @param {integer} afterNumber - greater than zero and default is three
*/
function getYearArrays (year, afterNumber = 3) {year = parseInt(year);
afterNumber = parseInt(afterNumber);
let length = Math.abs(afterNumber) + 1;
let negative_bool = afterNumber < 0;
let years = Array.from({length: length}).map((_item, index) => negative_bool ? year - index : year + index);
years.sort();
return years;
}
比拟两个日期大小:
/**
* 比拟两个日期构造
* gt 如果第一个日期晚于第二个日期,则返回 lt,反之亦然。如果两个日期相等,eq 则返回。* @param {string} date1 - 例如: 2020-10-10
* @param {string} date2 - 例如: 2020-10-10
*/
Date.prototype.compare = function (date1, date2) {
let platform = navigator.platform,
regexp = /(iphone|ios)/i;
// 如果是 IOS 零碎,须要的是 UTC 格局
if (regexp.test(platform)) {date1 = date1.replace("","T");
date2 = date2.replace("","T");
}
let date1_timestamp = new Date(date1).getTime(),
date2_timestamp = new Date(date2).getTime();
switch (true) {
case date1_timestamp > date2_timestamp:
return "gt";
case date1_timestamp < date2_timestamp:
return "lt";
default:
return "eq";
}
}
将获取到 week 0 ~ 6 转换成中文:
/**
* 把 获取到的星期几 转成 中文
* @param {integer} week - rang/ 范畴: 0 ~ 6
* @param {string} str - 字符串,拼接在 转换前的字符串
*/
function replaceWeekToChinese(week, str = "") {switch (week) {
case 0: str += "日"; break;
case 1: str += "一"; break;
case 2: str += "二"; break;
case 3: str += "三"; break;
case 4: str += "四"; break;
case 5: str += "五"; break;
case 6: str += "六"; break;
default: str = "输出谬误"; break;
}
return str;
}
主观逻辑工具函数:
上面的工具函数, 具备主观逻辑性,定的规定解决,不肯定适宜使用者,请审慎应用
计算岁数 / 孕周
/**
* 全局 的定义工夫 比照办法 date1 比照 date2 的
*/
Date.prototype.diff = function (date1, date2) {let date1_timestamp = new Date(date1).getTime(),
date2_timestamp = new Date(date2).getTime();
let diff_days = (date1_timestamp - date2_timestamp) / (3600000 * 24);
return parseInt(diff_days);
}
// 比拟两个日期构造
// gt 如果第一个日期晚于第二个日期,则返回 lt,反之亦然。如果两个日期相等,eq 则返回。Date.prototype.compare = function (date1, date2) {
let platform = navigator.platform,
regexp = /(iphone|ios)/i;
// 如果是 IOS 零碎,须要的是 UTC 格局
if (regexp.test(platform)) {date1 = date1.replace("","T");
date2 = date2.replace("","T");
}
let date1_timestamp = new Date(date1).getTime(),
date2_timestamp = new Date(date2).getTime();
switch (true) {
case date1_timestamp > date2_timestamp:
return "gt";
case date1_timestamp < date2_timestamp:
return "lt";
default:
return "eq";
}
}
/**
* 获取 零碎以后日期
* @param {integer} day - 默认为 0 就是以后日期,* 如果是 负数,就是明天的后几天
* 如果是 正数,就是明天的前几天
*/
function getDate(day = 0) {let current_date = new Date().getTime();
let date = new Date(current_date + day * 3600000 * 24);
let year = date.getFullYear();
let month = ("00" + (date.getMonth() + 1)).slice(-2);
let days = ("00" + date.getDate()).slice(-2);
return `${year}-${month}-${days}`;
}
/**
* 通过日期 计算日期
* @param {integer} day - 计算数, 正负整数
* @param {string} date - 日期,默认是明天 格局:2019-01-01
*/
function calcDateByNum(day, date = getDate()) {if ([undefined, null].includes(day)) {console.error("[error] utils.js calcDateByNum 的 num 不能为空!");
return;
}
let temp = new Date(date).getTime();
let new_date = new Date(temp + day * 3600000 * 24);
let year = new_date.getFullYear();
let month = ("00" + (new_date.getMonth() + 1)).slice(-2);
let days = ("00" + new_date.getDate()).slice(-2);
return `${year}-${month}-${days}`;
}
/**
* 计算月龄,返回 几个月零几天,例如:12.30 - 12 个月 30 日
* @param {String} birthday 出生日期
* @param {String} otherday 其余日期(默认是 明天)*/
function calculateAgeByDate(birthday, otherday = getDate()) {otherday = calcDateByNum(1, otherday);
let birthday_arr = birthday.split("-"),
otherday_arr = otherday.split("-");
let date_compare = new Date().compare(otherday, birthday);
switch (date_compare) {
case "gt":
let months = 12 * (otherday_arr[0] - birthday_arr[0]) + (otherday_arr[1] - birthday_arr[1]);
/**
* 1、如果 otherdays_arr[2] > birthday_arr[2],那就是曾经满了一个月了,还多进去多少天,用 otherdays_arr[2] - birthday_arr[2] 取得。*
* 2、otherdays_arr[2] == birthday_arr[2] 那就刚刚好满一个月。days 为 0
*/
if (otherday_arr[2] > birthday_arr[2]) {days = otherday_arr[2] - birthday_arr[2];
} else if (otherday_arr[2] < birthday_arr[2]) {
/**
* otherdays_arr[2] < birthday_arr[2] 有上面的状况
* 1、otherdays_arr[2] 和 birthday_arr[2] 都是那个月的最初一天。咱们认为是刚好满一个月。* 例如:生日是 31 以后是 30
*
* 2、birthday_arr[2] 是那个月的最初一天, 并且 otherdays 上一个月的总天数小于 birthday_arr[2],* days 等于 otherdays_arr[2]),* 例如:生日是 31 以后的上一个月最初一天是 28
*
* 3、其余状况,都是计算 birthday_arr[2] 到 otherdays 上一个月的总天数 差 加上 otherdays_arr[2]
* 例如:* calc_age("2006-02-28", "2008-02-29") 输入 2 岁 1 天
* calc_age("2006-02-28", "2008-03-01") 输入 2 岁 2 天
* 因为 2006 是平年,2 月只有 28 天,2008 是平年,最初一天是 29.
*/
let last_days = new Date(otherday_arr[0], otherday_arr[1], 0).getDate();
let last_month_last_days = new Date(otherday_arr[0], otherday_arr[1] - 1, 0).getDate();
let is_birthday_last_days = new Date(birthday_arr[0], birthday_arr[1], 0).getDate() == parseInt(birthday_arr[2]);
let is_otherday_last_days = last_days == parseInt(otherday_arr[2]);
let compare_days = parseInt(birthday_arr[2]);
if (is_birthday_last_days && is_otherday_last_days) {days = "00";} else if (is_birthday_last_days && parseInt(birthday_arr[2]) > last_days) {
months -= 1;
days = parseInt(otherday_arr[2]);
} else {
months -= 1;
days = last_month_last_days - parseInt(birthday_arr[2]) + parseInt(otherday_arr[2]);
}
} else {days = "00";}
return `${months}.${('0' + days).slice(-2)}`;
case "eq":
return 0;
default:
return -1;
console.error("&1 不能小于 &2");
}
}
/**
* 计算 出生日期 到 比照日期 的岁数
* 出生日期要 少于等于 比照日期
* @param {String} birthdays - 出生日期
* @param {String} otherday - 比照日期 默认是明天
* @returns {String} 例如: 1 岁 2 月 3 天
*/
function calculateAgeString(birthdays, otherday = getDate()) {let age = calculateAgeByDate(birthdays, otherday);
if (age == 0) {return `0 天 `;}
let age_months = new String(age).split(".")[0],
age_days = new String(age).split(".")[1];
let year = parseInt(age_months / 12),
months = parseInt(age_months % 12),
days = parseInt(age_days);
let year_str = `${year} 岁 `,
months_str = `${months} 个月 `,
days_str = `${days} 天 `;
if (!year) {year_str = "";}
if (!months) {months_str = "";}
if (!days) {days_str = "";}
return year_str + months_str + days_str;
}
/**
* 反推计算以后怀孕的天数
* @param {String} birthday - 预产期
*/
function calculateGestationalDays(birthday, now = getDate()) {let diff_days = new Date().diff(birthday, now);
let total_days = 40 * 7;
switch (true) {
case diff_days > 0:
return {
gestational_days: total_days - diff_days,
progress_percent: (total_days - diff_days) / total_days * 100
};
case diff_days == 0:
return {
gestational_days: total_days,
progress_percent: 100
};
default:
return {
gestational_days: total_days - diff_days,
progress_percent: 100
};
}
}
/**
* 把反推的怀孕多少天。转成文字版
* @param {Integer} gestational_days - 怀孕多少天
* */
function getGestationalShow(gestational_days) {let week = Math.floor(gestational_days / 7),
days = gestational_days % 7;
switch (true) {
case week == 0:
return `${days} 天 `;
case days == 0:
return `${week} 周 `;
default:
return `${week} 周 ${days} 天 `;
}
}
/**
* 获取以后工夫,替换问候语
* */
function getGeetings() {let date = new Date();
let txt = "";
let hour = date.getHours();
switch (true) {
case hour >= 6 && hour < 12:
txt = "上午好";
break;
case hour >= 12 && hour < 18:
txt = "下午好";
break;
default:
txt = "早晨好";
}
return txt;
}