/**
* JS 加、减、乘、除运算避免浮点数
* @param {string | number} arg1 数字1
* @param {string | number} arg2 数字2
*/
export const accAdd = (arg1,arg2) => {
let r1,r2,m;
try{r1=arg1.toString().split(".")[1].length}catch(e){r1=0}
try{r2=arg2.toString().split(".")[1].length}catch(e){r2=0}
m=Math.pow(10,Math.max(r1,r2))
return (arg1*m+arg2*m)/m
}
export const accSub = (arg1,arg2) => {
let r1,r2,m,n;
try{r1=arg1.toString().split(".")[1].length}catch(e){r1=0}
try{r2=arg2.toString().split(".")[1].length}catch(e){r2=0}
m=Math.pow(10,Math.max(r1,r2));
n=(r1>=r2)?r1:r2;
return ((arg1*m-arg2*m)/m).toFixed(n);
}
export const accMul = (arg1,arg2) => {
let m=0,s1=arg1.toString(),s2=arg2.toString();
try{m+=s1.split(".")[1].length}catch(e){}
try{m+=s2.split(".")[1].length}catch(e){}
return Number(s1.replace(".",""))*Number(s2.replace(".",""))/Math.pow(10,m)
}
export const accDiv = (arg1,arg2) => {
let t1=0,t2=0,r1,r2;
try{t1=arg1.toString().split(".")[1].length}catch(e){}
try{t2=arg2.toString().split(".")[1].length}catch(e){}
r1=Number(arg1.toString().replace(".",""))
r2=Number(arg2.toString().replace(".",""))
return (r1/r2)*Math.pow(10,t2-t1);
}
/**
* 倒计时
* @param {string} times 剩余秒数
* @param {function} callback 回调函数
*/
export const countDown = (times,callback) => {
let timer = null;
timer = setInterval(() => {
if(times > 0){
let day = Math.floor(times / (60 * 60 * 24));
let hour = Math.floor(times / (60 * 60)) - (day * 24);
let minute = Math.floor(times / 60) - (day * 24 * 60) - (hour * 60);
let second = Math.floor(times) - (day * 24 * 60 * 60) - (hour * 60 * 60) - (minute * 60);
day = `${day < 10 ? '0' : ''}${day}`;
hour = `${hour < 10 ? '0' : ''}${hour}`;
minute = `${minute < 10 ? '0' : ''}${minute}`;
second = `${second < 10 ? '0' : ''}${second}`;
callback(`${minute}:${second}`)
times--;
}else{
clearInterval(timer);
callback(false)
}
}, 1000);
if (times <= 0) {
clearInterval(timer);
callback(false)
}
}
/**
* 驼峰字符串格式化 (默认下划线)
* @param {srting} string 目标字符串
* @param {object} options 转化类型
*/
export const decamelize = (string, options = {}) => {
let separator = options.separator || '_';
let split = options.split || /(?=[A-Z])/;
return string.split(split).join(separator).toLowerCase();
}
// console.log(decamelize("minPriceOne")); //min_price_one
// console.log(decamelize("minPriceOne", { separator: '-' })); // min-price-one
/**
* 验证手机号
* @param {srting | number} number 手机号码
*/
export const isPhone = (number) => {
let reg = /^1[3456789]\d{9}$/;
return reg.test(number);
}
/**
* 验证邮箱
* @param {srting | number} str 邮箱地址
*/
export const isEmail = (str) => {
let reg = /(^1[3456789]\d{9}$)|(^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$)/;
return reg.test(str);
}
/**
* 验证手机号或者邮箱
* @param {srting | number} str 邮箱地址或手机号码
*/
export const isPhoneEmail = (str) => {
let reg = /(^1[3456789]\d{9}$)|(^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$)/;
return reg.test(str);
}
/**
* 8到20位密码验证（字母，数字，特殊符号任意两种组合）
* @param {srting} num 密码
*/
export const isPassword = (num) => {
let reg = /^(?![a-zA-z]+$)(?!\d+$)(?![!"#$%&'()*+,-./:;<=>?^_`\{|}~@]+$)[a-zA-Z\d!"#$%&'()*+,-./:;<=>?^_`\{|}~@]{8,20}$/;
// let reg = /^(?![a-zA-z]+$)(?!\d+$)(?![_#@.]+$)[a-zA-Z\d_#@.]{8,20}$/;
return reg.test(num);
}
/**
* 验证身份证号码
* @param {srting | number} str 身份证号
*/
export const isNumberId = (str) => {
// 身份证号码为15位或者18位，15位时全为数字，18位前17位为数字，最后一位是校验位，可能为数字或字符X
let reg = /(^\d{15}$)|(^\d{18}$)|(^\d{17}(\d|X|x)$)/;
return reg.test(str);
}
/**
* 将时间戳转换成指定的日期格式
* @param {srting | number} x 时间戳
* @param {srting} y 指定格式 eg: 'yyyy-MM-dd hh:mm:ss'
*/
export const formatDate = (x,y) => {
if (!(x instanceof Date)) {
let date = new Date();
date.setTime(x * 1000);
x = date;
}
let z = {
y: x.getFullYear(),
M: x.getMonth() + 1,
d: x.getDate(),
h: x.getHours(),
m: x.getMinutes(),
s: x.getSeconds()
};
return y.replace(/(y+|M+|d+|h+|m+|s+)/g, function(v) {
return ((v.length > 1 ? "0" : "") + eval("z." + v.slice(-1))).slice(
-(v.length > 2 ? v.length : 2)
);
});
}
/**
* 将日期格式转换成时间戳
* @param {srting} myDate 时间字符串
*/
export const timeStamp = (myDate) => {
let date = new Date(myDate);
return date.getTime()/1000;
}
/**
* 格林尼治时间字符串转时间字符串
* @param {string} myTimes 格林尼治时间
*/
export const formatDateGL = (myTimes) => {
let d = new Date(myTimes);
let format = d.getFullYear() + '-' + (d.getMonth() + 1) + '-' + d.getDate() + ' ' + d.getHours() + ':' + d.getMinutes() + ':' + d.getSeconds();
return this.timeStamp(format)
};
/**
* 获取N天前的日期
* @param {srting} n 几天前
*/
export const getNday = (n) => {
let date = new Date();
let newDate = new Date(date.getTime() - n * 24 * 60 * 60 * 1000);
let time = newDate.getFullYear() + "-" + (newDate.getMonth() + 1) + "-" + newDate.getDate();
return time;
}
/**
* 是否是微信环境
*/
export const inWeixin = () => {
let ua = navigator.userAgent.toLowerCase();
return ua.indexOf("micromessenger") != -1;
};
/**
* 是否是安卓环境
*/
export const isAndroid = () => {
let ua = navigator.userAgent;
return ua.indexOf('Android') > -1 || ua.indexOf('Adr') > -1;
};
/**
* 是否是iOS环境
*/
export const isiOS = () => {
let ua = navigator.userAgent;
return !!ua.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/);
};
/**
* 获取指定cookie
* @param {srting} key cookie名
*/
export const getCookie = (key) => {
let arr,
reg = new RegExp("(^| )" + key + "=([^;]*)(;|$)");
if ((arr = document.cookie.match(reg))) return decodeURI(arr[2]);
else return null;
}
/**
* 设置cookie
* @param {srting} key cookie名
* @param {srting} value cookie值
* @param {srting} expiredays cookie有效时间
*/
export const setCookie = (key,value,expiredays) => {
let exdate = new Date();
exdate.setDate(exdate.getDate() + expiredays);
document.cookie = `${key}=${escape(value)};expires=${exdate.toGMTString()};domain=${document.domain};path=/`
}
/**
* 删除指定cookie
* @param {srting} key cookie名
*/
export const clearCookie = (key) => {
let exp = new Date();
exp.setTime(exp.getTime() - 1);
let cval = getCookie(key);
if (cval != null){
document.cookie = `${key}=${cval};expires=${exdate.toGMTString()};domain=${document.domain};path=/`
}
}
/**
* 删除所有cookie
*/
export const clearCookie = () => {
let keys = document.cookie.match(/[^ =;]+(?=\=)/g);
if (keys) {
for (var i = keys.length; i--; )
document.cookie = `${keys[i]}=0;expires=${new Date(0).toUTCString()};domain=${document.domain};path=/`
}
}
/**
* 获取url参数
* @param {srting} key 参数名
*/
export const GetQueryString = (key) => {
let reg = new RegExp('(^|&)' + key + '=([^&]*)(&|$)', 'i')
let r = window.location.search.substr(1).match(reg)
if (r != null) return unescape(r[2])
return null
}
/**
* vue中js获取url参数
* @param {srting} key 参数名
*/
export const getQueryString= (name) => {
return decodeURIComponent((new RegExp('[?|&]' + name + '=' + '([^&;]+?)(&|#|;|$)').exec(location.href) || [, ''])[1].replace(/\+/g, '%20')) || null
}
/**
* 拼接对象为请求字符串
* @param {Object} obj 待拼接的对象
* @returns {string} 拼接成的请求字符串
*/
export const encodeParams = (obj) => {
let params = [];
Object.keys(obj).forEach(function(key) {
let value = obj[key];
// 如果值为undefined我们将其置空
if (typeof value === "undefined") {
value = "";
}
if (typeof value === "object") {
value = JSON.stringify(value);
}
// 对于需要编码的文本（比如说中文）我们要进行编码
params.push([key, encodeURIComponent(value)].join("="));
});
return params.join("&");
}
/**
* 获取url中"?"符后的字符串并转化为对象
*/
export const GetRequest = () => {
let url = location.search;
let theRequest = new Object();
if (url.indexOf("?") != -1) {
let str = url.substr(1);
strs = str.split("&");
for (let i = 0; i < strs.length; i++) {
theRequest[strs[i].split("=")[0]] = unescape(strs[i].split("=")[1]);
}
}
return theRequest;
}
/**
* 保留n位小数,不会进行四舍五入
* @param {string | number } cnum 原数字
* @param {string | number } cindex 保留位数默认2位
*/
export const toDecimal = (cnum,cindex = 2) => {
let value = String(cnum);
if (value.indexOf(".") > 0) {
let left = value.substr(0, value.indexOf("."));
let right = value.substr(value.indexOf(".") + 1, value.length);
if (right.length > cindex) {
right = right.substr(0, cindex);
}
value = left + "." + right;
return value;
}else {
return cnum;
}
}
/**
* 获取小数点位数
* @param {string | number } num 原数字
*/
export const decimalLength = (num) => {
return String(num).length - (String(num).indexOf('.') + 1);
}
/**
* 科学计数法
* @param {string | number } num 原数字
*/
export const science = (num) => {
if ((num + '').indexOf('E-') > -1 || (num + '').indexOf('e-') > -1) {
var a = (num + '').indexOf('E-') > -1 ? (num + '').split('E-') : (num + '').split('e-'),
b = a[0],
c = parseInt(a[1]),
d = [],
i;
for (i = 0; i < c - 1; i++) {
d[i] = 0;
}
num = '0.' + d.join('') + (b * 100);
}
return num
}
/**
* 数组对象排序 大到小 eg:arr.sort(maxSort("age")) //根据key = "age" 做排序
* @param {string } prop 排序条件
*/
export const maxSort = (prop) => {
return function (obj1, obj2) {
let val1 = obj1[prop];
let val2 = obj2[prop];
if (!isNaN(Number(val1)) && !isNaN(Number(val2))) {
val1 = Number(val1);
val2 = Number(val2);
}
if (val1 > val2) {
return -1;
} else if (val1 < val2) {
return 1;
} else {
return 0;
}
}
}
/**
* 数组对象排序 小到大 eg:arr.sort(minSort("age"))//根据key = "age" 做排序
* @param {string } prop 排序条件
*/
export const maxSort = (prop) => {
return function (obj1, obj2) {
let val1 = obj1[prop];
let val2 = obj2[prop];
if (!isNaN(Number(val1)) && !isNaN(Number(val2))) {
val1 = Number(val1);
val2 = Number(val2);
}
if (val1 < val2) {
return -1;
} else if (val1 > val2) {
return 1;
} else {
return 0;
}
}
}
/**
* 数字千分位格式化
* @param {string | number} num 数字
*/
export const comdify = (num) => {
return num.toString().replace(/\d+/, function (n) { // 先提取整数部分
return n.replace(/(\d)(?=(\d{3})+$)/g, function ($1) { // 对整数部分添加分隔符
return $1 + ",";
});
});
}
/**
* 将base64的图片转为Blob格式
* @param {string} dataurl base64地址
*/
export const dataURLtoBlob = (dataurl) => {
let arr = dataurl.split(','), mime = arr[0].match(/:(.*?);/)[1],
bstr = atob(arr[1]), n = bstr.length, u8arr = new Uint8Array(n);
while (n--) {
u8arr[n] = bstr.charCodeAt(n);
}
return new Blob([u8arr], { type: mime });
}
/**
* 将base64图片转file文件
* @param {string} dataurl base64地址
* @param {string} filename
*/
export const dataURLtoFile = (dataurl, filename) => {
let arr = dataurl.split(','), mime = arr[0].match(/:(.*?);/)[1],
bstr = atob(arr[1]), n = bstr.length, u8arr = new Uint8Array(n);
while(n--){
u8arr[n] = bstr.charCodeAt(n);
}
return new File([u8arr], filename, {type:mime});
}
/**
* 复制功能（iOS下某些版本不兼容）
* @param {string} copyInfo 需要复制的内容
*/
export const Copy = (copyInfo) => {
return new Promise((resolve, reject) => {
let copyUrl = document.createElement("input");//创建一个input框获取需要复制的文本内容
copyUrl.value = copyInfo;
let appDiv = document.getElementById('app');
appDiv.appendChild(copyUrl);
copyUrl.select();
document.execCommand("Copy");
copyUrl.remove()
resolve(true);
})
}
/**
* 随机生成uuid
*/
export const generateUUID = () => {
let d = new Date().getTime();
if (window.performance && typeof window.performance.now === "function") {
d += performance.now();
}
let uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
let r = (d + Math.random() * 16) % 16 | 0;
d = Math.floor(d / 16);
return (c == 'x' ? r : (r & 0x3 | 0x8)).toString(16);
});
return uuid;
};
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