欢迎点击领取 -《前端面试题进阶指南》：前端登顶之巅-最全面的前端知识点梳理总结
前言
在闲余的时间整理一份我们可能用到的前端工具库方法。
| 依赖库 |
名称 |
| cropperjs |
图片裁剪 |
| exif-js、lrz |
图片旋转问题 |
| html2canvas |
dom转图片 |
| nprogress |
路由进度条 |
| v-viewer |
图片放大多功能 |
| caret-pos |
偏移量 |
1.获取url地址参数
export function getQueryStringByStr(data) {
const url = data; // 获取url中"?"符后的字串
const theRequest = {};
if (url.indexOf('?') !== -1) {
const str = url.substr(1);
const strs = str.split('&');
for (let i = 0; i < strs.length; i += 1) {
theRequest[strs[i].split('=')[0]] = unescape(strs[i].split('=')[1]);
}
}
return theRequest;
}
2.针对检索值(搜索)统一处理空格问题
/**
* @param {Object} props
* @description 针对搜索值做统一处理
*/
export function convertParams(props) {
const newParams = {};
for (const index in props) {
const item = props[index];
const type = typeof item;
if (item && type === 'string') {
newParams[index] = item.replace(/\s/g, '');
} if (Object.prototype.toString.call(item) === '[object Object]') {
newParams[index] = convertParams(item)
} else {
newParams[index] = item;
}
}
return newParams;
};
3.权限方法判断
/**
* @param {Array|String} target 目标数组
* @param {Boolean} boolean 是否开启与的关系
* @description 判断当前用户是否在权限数据中
*/
export const authority = (target, boolean = false) => {
const str = getProps('authority') // 获取当前角色的所有权限码， 自定义获取;
if (Array.isArray(target)) {
if (boolean) {
return target.every(item => roles.indexOf(item) > -1)
}
return target.some(item => roles.indexOf(item) > -1)
}
return str && str.indexOf(target) > -1
}
4.菜单栏权限控制是否显示
/**
* 菜单栏权限显示隐藏/现在很多架构都是自动化路由，有现成的权限配置
* @param {Array} list 通过路由列表得到菜单列表
* @returns {Array}
* @description 通过用户权限控制的菜单列表（简易版）
*/
export const hasChild = (item) => {
return item.children && item.children.length !== 0
}
export const getMenuByAside = (list) => {
let res = [];
list.forEach(item => {
if (!item.access || authority(item.access)) {
let obj = {
title: item.title,
index: item.index,
icon: item.icon,
access: item.access || undefined,
}
if (hasChild(item)) obj.children = getMenuByAside(item.children)
if (hasChild(item) && authority(item.access)) {
obj.children = getMenuByAside(item.children)
}
res.push(obj)
}
})
return res
}
5.二维数组转换
/**
* @param {Array} target 目标数组
* @param {String} key 目标key值
* @param {Boolean} boolean 是否需要数组转换
* @param {Object} option 匹配的对象key值,值：label/value/boolean
* @return {Array}
* @description 处理二维数组转一维数组匹配相关字段值
*/
export const reduceConcat = (target, key, boolean, option) => {
let newTarget = [];
const { label, bool, value } = option || {};
newTarget = target && target.map(item => {
if (boolean) {
return item[key] && item[key].map(opt => ({
...item,
[key]: opt,
[label]: bool ? item[label][value] : item[label]
}))
}
return item[key];
}
).reduce((a, b) => a.concat(b));
return newTarget || [];
}
7. 针对json数组对象的去重
/**
* @param {Array} array 目标数据
* @param {String} label 匹配对象的字段
* @description 针对json数组对象的去重
*/
export function uniqueArray(array, label) {
const obj = {};
array = array.reduce((pre, next) => {
!obj[next[label]] ? (obj[next[label]] = true && pre.push(next)) : "";
return pre;
}, []);
return array;
}
6. 时间类
// 转换时间（时分秒）
/**
* @param {Number|String} msd 转换时间戳
* @description 将时间戳转换成时分秒
*/
export function dealTimeToText(value) {
let time = Math.floor(value / 1000)
let h = Math.floor(Math.floor(time / 60) / 60)
let min = Math.floor(time / 60) % 60
let s = Math.round(time % 3600 % 60)
if (h > 0) {
return `${h}h${min}min${s}s`
} else if (min > 0) {
return `${min}min${s}s`
} else {
return `${s}s`
}
}
// 当天晚上23:59:59
const endTime = new Date(new Date(new Date().toLocaleDateString()).getTime() + 24 * 60 * 60 * 1000 - 1);
// 一月时间
let start = new Date();
start.setMonth(start.getMonth() - 3);
return start.getTime() > time.getTime() || time.getTime() > endTime;
// 一周时间
const operateTime = [
new Date(new Date().toLocaleDateString()).getTime() - 7 * 24 * 3600 * 1000,
new Date().setHours("23", "59", "59")
];
/**
* @param {Number|String} value
* @description 秒数转化为时分秒
*/
export const formatSeconds = (value) => {
let secondTime = parseInt(value), minuteTime = 0, hourTime = 0;
if (secondTime > 60) {
minuteTime = parseInt(secondTime / 60);
secondTime = parseInt(secondTime % 60);
if (minuteTime > 60) {
hourTime = parseInt(minuteTime / 60);
minuteTime = parseInt(minuteTime % 60);
}
}
let result = "" + parseInt(secondTime) + "秒";
if (minuteTime > 0) {
result = "" + parseInt(minuteTime) + "分" + result;
}
if (hourTime > 0) {
result = "" + parseInt(hourTime) + "小时" + result;
}
return result;
}
/**
* @param {String} dateTime 接收的日期eg: 1994-03-2 || 1569404854000
* @description 通用年龄计算公式
* */
import moment from 'moment';
export const getAgeYear = (dateTime) => {
let reg = /^(\d{4})-(\d{1,2})-(\d{1,2})$/
let time = !reg.test(dateTime) ? moment(dateTime, 'YYYY-MM-DD') : dateTime;
let regexp = time.match(/^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2})$/);
if (!regexp) return '';
let date = new Date(regexp[1], regexp[3] - 1, regexp[4]);
if (date.getFullYear() == regexp[1] && (date.getMonth() + 1) == regexp[3]
&& date.getDate() == regexp[4]) {
let year = new Date().getFullYear();
return year - regexp[1];
}
}
/**
* @param {Number} timelong 时间戳
* @param {String} format 格式类型
* @description 时间转换格式方法
* */
export const formatDate = (timelong, format = 'YYYY-MM-DD') => {
function format2n(val) {
return val < 10 ? '0' + '' + val : val;
}
let date = new Date(timelong);
let year = date.getFullYear() + '';
let month = format2n(date.getMonth() + 1) + '';
let day = format2n(date.getDate()) + '';
let hour = format2n(date.getHours()) + '';
let minute = format2n(date.getMinutes()) + '';
let second = format2n(date.getSeconds()) + '';
return format.replace(/YYYY/g, year).replace(/YYY/g, year.slice(1)).replace(/YY/g, year.slice(2)).replace(/Y/g, year.slice(1)).replace(/MM/g, month).replace(/M/g, month.slice(1)).replace(/DD/g, day).replace(/D/g, day.slice(1)).replace(/hh/g, hour).replace(/h/g, hour.slice(1)).replace(/mm/g, minute).replace(/m/g, minute.slice(1)).replace(/ss/g, second).replace(/s/g, second.slice(1));
};
/**
* @param {Number} timelong 时间戳
* @description 显示时间之前
* */
export const formatTimeAgo = (timelong) => {
const nowtime = new Date().getTime();
let diffValue = nowtime - timelong;
const bs = (diffValue >= 0 ? '前' : '后'); // 判断时间点是在当前时间的 之前 还是 之后
diffValue = Math.abs(diffValue);
if (diffValue < 6e4) { return '刚刚' } // 小于60秒,刚刚
if (diffValue < 36e5) { return parseInt(diffValue / 6e4) + '分钟' + bs } // 小于1小时,按分钟
if (diffValue < 864e5) { return parseInt(diffValue / 36e5) + '小时' + bs } // 小于1天按小时
if (diffValue > 864e5 && diffValue < 1728e5) { return '昨天' } // 大于24小时小于48小时
if (diffValue > 1728e5 && diffValue < 31536e6) { return formatDate(timelong, 'MM-DD') } // 大于48小时小于365天
return formatDate(timelong, 'YYYY-MM-DD')
}
7.随机生成16进制颜色值，并改变状态
// 组件渲染后，500毫秒改变一次组件颜色
componentDidMount() {
this.interval = setInterval(this.getRandomColor, 500);
}
getRandomColor = () => {
this.setState({
col: '#'+('00000'+(Math.random()*0x1000000<<0).toString(16)).slice(-6),
});
}
8.背景水印简易版
/**
* @param {str} 用户需要显示的水印信息
* @description 背景水印
* */
export function addWaterMarker(str) {
const can = document.createElement('canvas');
// const { body } = document;
// body.appendChild(can);
can.width = 200;
can.height = 100;
can.style.display = 'none';
const cans = can.getContext('2d');
cans.rotate(20 * Math.PI / 180);
cans.font = '16px Microsoft JhengHei';
cans.fillStyle = 'rgba(17, 17, 17, 0.50)';
cans.textAlign = 'left';
cans.textBaseline = 'Middle';
cans.fillText(str, can.width / 3, can.height / 2);
return `url(${can.toDataURL('image/png')})`;
}
/**
* url转base64
*/
urlToBase64(url) {
return new Promise((resolve, reject) => {
let canvas = document.createElement("canvas"),
ctx = canvas.getContext("2d"),
img = new Image();
img.crossOrigin = "Anonymous";
img.src = url;
img.onload = () => {
canvas.width = img.width;
canvas.height = img.height;
ctx.drawImage(img, 0, 0, img.width, img.height);
let dataUrl = canvas.toDataURL("image/jpeg");
canvas = null;
resolve(dataUrl);
};
});
},
9.常用code码统一报错提示
const codeMessage = {
200: '服务器成功返回请求的数据。',
201: '新建或修改数据成功。',
202: '一个请求已经进入后台排队（异步任务）。',
204: '删除数据成功。',
400: '发出的请求有错误，服务器没有进行新建或修改数据的操作。',
401: '用户没有权限（令牌、用户名、密码错误）。',
403: '用户得到授权，但是访问是被禁止的。',
404: '发出的请求针对的是不存在的记录，服务器没有进行操作。',
406: '请求的格式不可得。',
410: '请求的资源被永久删除，且不会再得到的。',
422: '当创建一个对象时，发生一个验证错误。',
500: '服务器发生错误，请检查服务器。',
502: '网关错误。',
503: '服务不可用，服务器暂时过载或维护。',
504: '网关超时。',
};
10.原生ajax下载导出
/**
* @param {String} url 下载URL地址
* @param {String|Number} downloadName 下载文件名称
* @Parma {type} 下载请求方法get||post
* @description 导出Excel文件
* */
import Vue from 'vue';
import moment from 'moment';
import Cookies from "js-cookie";
const that = new Vue();
export function fileDownload(url, downloadName = moment(new Date(), 'YYYY-MM-DD') + "任务监控数据表", option) {
const { type, status, message, messageErr, params } = option;
let fileName = downloadName + '.xlsx';
let request = new XMLHttpRequest();
status ? that.$message({
type: 'warning',
showClose: true,
message: message || '已点击正在下载，请稍后...',
}) : null;
request.open(type || 'GET', url, true);
request.setRequestHeader("Authorization", Cookies.get("user-token"));
request.setRequestHeader(
"Content-Type",
params ? 'application/json' : "application/x-www-form-urlencoded; charset=UTF-8"
);
request.responseType = "blob";
request.onload = function () {
if (this.status === 200) {
let blob = this.response;
if (window.navigator.msSaveOrOpenBlob) {
window.navigator.msSaveBlob(blob, fileName);
} else {
let downloadLink = document.createElement("a");
let contentTypeHeader = request.getResponseHeader("Content-Type");
downloadLink.href = window.URL.createObjectURL(
new Blob([blob], { type: contentTypeHeader })
);
downloadLink.download = fileName;
document.body.appendChild(downloadLink);
downloadLink.click();
document.body.removeChild(downloadLink);
window.URL.revokeObjectURL(downloadLink.href)
}
} else {
that.$message({
type: 'error',
showClose: true,
message: messageErr ||'文件下载失败...',
});
}
};
request.send(params ? JSON.stringify(params) : void null);
}
10.file文件转码
const toDataUrl = (blob) => {
return new Promise(resolve => {
let file = new FileReader();
file.onload = event => {
resolve(event.target.result);
};
file.readAsDataURL(blob);
});
},
11. url参数加密
export const Base64 = {
//加密
encode(params) {
return btoa(encodeURIComponent(params).replace(/%([0-9A-F]{2})/g,
function toSolidBytes(match, option) {
return String.fromCharCode('0x' + option);
}));
},
//解密
decode(params) {
return decodeURIComponent(atob(params.replace(/\s/g, '+')).split('').map(option => '%' + ('00' + option.charCodeAt(0).toString(16)).slice(-2)).join(''));
}
}
\s : 表示 space ，空格
+： 一个或多个
^： 开始，^\s，以空格开始 结束，\s$，以空格结束
|：或者
/g：global， 全局
12. 背景水印
'use strict'
const watermark = {};
/**
* @param {String} str // 要设置的水印的内容
* @param {String} container // 需要设置水印的容器
*/
const id = '1.23452384164.123412415';
const setWatermark = (str, container) => {
if (!container) return false;
if (document.getElementById(id) !== null) { // 查看页面上有没有，如果有则删除
const childelement = document.getElementById(id)
childelement.parentNode.removeChild(childelement)
}
const containerWidth = container.offsetWidth // 获取父容器宽
const containerHeight = Math.max(container.scrollHeight, document.body.clientHeight); // 获取父容器高
container.style.position = 'relative' // 设置布局为相对布局
const can = document.createElement('canvas') // 创建canvas元素(先制作一块背景图)
can.width = 300 // 设置每一块的宽度
can.height = 200 // 高度
const cans = can.getContext('2d') // 获取canvas画布
cans.rotate(20 * Math.PI / 180) // 逆时针旋转π/9
cans.font = '14px Microsoft JhengHei'; // 设置字体
cans.fillStyle = 'rgba(17, 17, 17, 0.2)' // 设置字体的颜色
cans.textAlign = 'left' // 文本对齐方式
cans.textBaseline = 'Middle' // 文本基线
cans.fillText(str, can.width / 3, can.height / 2); // 绘制文字
const div = document.createElement('div') // 创建一个div元素
div.id = id // 设置id
div.style.pointerEvents = 'none' // 取消所有事件
div.style.top = '0px'
div.style.left = '0px'
div.style.position = 'absolute'
div.style.zIndex = '10000'
div.style.width = containerWidth + 'px'
div.style.height = containerHeight + 'px'
div.style.background = 'url(' + dataURLtoBlob(can.toDataURL('image/png')) + ')'
container.appendChild(div) // 追加到页面
return id
}
function dataURLtoBlob(dataurl) {
let arr = dataurl.split(',');
let mime = arr[0].match(/:(.*?);/)[1];
let bstr = atob(arr[1]);
let n = bstr.length;
let u8arr = new Uint8Array(n);
while (n--) {
u8arr[n] = bstr.charCodeAt(n);
}
return URL.createObjectURL(new Blob([u8arr], { type: mime }));
}
let _interval = null;
// 该方法只允许调用一次
watermark.set = (str, container) => {
let id = setWatermark(str, container)
_interval = setInterval(() => {
if (document.getElementById(id) === null) {
id = setWatermark(str, container)
}
}, 500)
window.onresize = () => { // 监听页面大小的变化
setWatermark(str, container)
}
}
export default watermark;
12. 随机生成颜色
getArrRandomly() {
const tagsColor = ["info", "warning", "danger", ""];
var colorIndex = Math.floor(Math.random() * tagsColor.length);
var color = tagsColor[colorIndex];
tagsColor.splice(colorIndex, 1);
return color;
},
13. 倒计时
startTime(bolean, endTimer) {
let minute = 0
let second = 0
const that = this
if (endTimer) {
;[minute, second] = this.callinTime.split(':')
minute = Number(minute)
second = Number(second)
}
if (bolean === true) {
that.timer = setInterval(() => {
if (second >= 0) {
second = second + 1
}
if (second >= 60) {
second = 0
minute = minute + 1
}
if (endTimer && that.callinTime === endTimer) {
this.suspendStatus = false
this.callinTime = '00:00'
return clearInterval(that.timer)
}
that.callinTime =
(minute < 10 ? '0' + minute : minute) +
':' +
(second < 10 ? '0' + second : second)
}, 1000)
} else {
clearInterval(that.timer)
}
}
14. 金额转换
function toThousands(num) {
if (num && num.toString().length > 4) {
const result = num.toString().replace(/(\d)(?=(?:\d{4})+$)/g, '$1.')
return Number(result).toFixed(1) + 'w'
}
return num
}
15. 页面滚动监听事件，实现滚动加载
// 页面滚动监听事件
export function scrollToBottom(callBack: any) {
window.onscroll = () => {
let scrollTop = 0
let bodyScrollTop = 0
let documentScrollTop = 0
if (document.body) {
bodyScrollTop = document.body.scrollTop
}
if (document.documentElement) {
documentScrollTop = document.documentElement.scrollTop
}
scrollTop =
bodyScrollTop - documentScrollTop > 0 ? bodyScrollTop : documentScrollTop
let scrollHeight = 0
let bodyScrollHeight = 0
let documentScrollHeight = 0
if (document.body) {
bodyScrollHeight = document.body.scrollHeight
}
if (document.documentElement) {
documentScrollHeight = document.documentElement.scrollHeight
}
// 获取文档元素的内容垂直滚动的像素数
scrollHeight =
bodyScrollHeight - documentScrollHeight > 0
? bodyScrollHeight
: documentScrollHeight
let windowHeight = 0
// 判断当前文档的渲染模式是混杂模式还是"标准模式"
if (document.compatMode === 'CSS1Compat') {
// “标准模式”或者“准标准模式(almost standards mode)”
windowHeight = document.documentElement.clientHeight
} else {
// 混杂模式,值为"BackCompat"
windowHeight = document.body.clientHeight
}
// 若文档内容垂直滚动像素 + 当前窗口高度的像素 === document.body.scrollHeight或document.documentElement.scrollHeight返回Promise对象，执行后续操作
if (scrollHeight - (scrollTop + windowHeight) < 1000) {
callBack()
}
}
}
// 使用
scrollToBottom(() => {
if (!this.loadMore) return false
this.getDataList()
})
16. 两数组重组json
// 数据匹配重组
function filterDataList(data, targetArr, option) {
const { lable } = option
const array = [];
for (let i = 0; i < data.length; i++) {
const item = data[i]
array.push(item);
for (let j = 0; j < targetArr.length; j++) {
if (item[lable] === item[lable]) {
array[i] = Object.assign({}, item, targetArr[j]); //合并对象
targetArr.splice(j, 1); //删除本次合并的对象，增加性能
break;
}
}
}
return array;
}
17. 图片压缩
const MAX_SIZE = 10485760 //图片最大字节数
function compressImg(file, quality) {
let reader = new FileReader()
let image = new Image()
let canvas = document.createElement('canvas');
let context = canvas.getContext('2d');
return new Promise(resolve => {
reader.readAsDataURL(file) // 文件base64化，以便获知图片原始尺寸
reader.onload = e => image.src = e.target.result;
image.onload = _ => {
let originWidth = image.width;
let originHeight = image.height;
let targetWidth = originWidth, targetHeight = originHeight;
canvas.width = targetWidth; // canvas对图片进行缩放
canvas.height = targetHeight;
context.clearRect(0, 0, targetWidth, targetHeight); // 清除画布
context.drawImage(image, 0, 0, targetWidth, targetHeight); // 图片压缩
canvas.toBlob(blob => { //压缩后的图片base64 url /*canvas.toDataURL(mimeType, qualityArgument),mimeType 默认值是'image/jpeg'; * qualityArgument表示导出的图片质量，只要导出为jpg和webp格式的时候此参数才有效果，默认值是0.92*/
if (blob.size > MAX_SIZE) {
alert('最大只允许上传10MB哦～')
resolve()
} else {
resolve(blob)
}
}, 'image/jpeg', quality)
}
})
}
//计算压缩质量
function computedQuality(size, max, count = 1) {
if (size >= max) {
if (count > 1) {
return 0.1 * count - .1
} else {
return 0.1 * count
}
} else {
if (max - EVA <= 0) {
return .9
} else {
return computedQuality(size, max - EVA, ++count)
}
}
}
18. 计算两个日期时间相差的年数、月数、天数、日期时间
/**
* 计算两个日期时间相差的年数、月数、天数、日期时间
* console.log(formatExpirationTime('2019-6-30', '2020-10-01'))
*/
export const formatExpirationTime = (startTime, endTime) => {
function getDays(mouth, year) {
let days = 30
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
) {
days = 31
}
return days
}
const start: any = new Date(startTime)
const end: any = new Date(endTime)
const diffValue = end - start
const startYear = start.getFullYear()
const endYear = end.getFullYear()
const startMouth = start.getMonth() + 1
const endMouth = end.getMonth() + 1
const startDay = start.getDate()
const endDay = end.getDate()
const startHours = start.getHours()
const endHours = end.getHours()
const startMinutes = start.getMinutes()
const endMinutes = end.getMinutes()
const startSeconds = start.getSeconds()
const endSeconds = end.getSeconds()
if (diffValue >= 8.64e7 * 30) {
const diffYear = endYear - startYear
const startDays = getDays(startMouth, startYear)
const endDays = getDays(endMouth, endYear)
const diffStartMouth =
(startDays - (startDay + (startHours * 60 + startMinutes + startSeconds / 60) / 60 / 24 - 1)) /
startDays
const diffEndMouth = (endDay + (endHours * 60 + endMinutes + endSeconds / 60) / 60 / 24 - 1) / endDays
const diffMouth = diffStartMouth + diffEndMouth + (12 - startMouth - 1) + endMouth + (diffYear - 1) * 12
if (diffValue >= 8.64e7 * 365) {
const diffYear = Math.floor((diffMouth / 12) * 100) / 100
const year = parseInt((((diffMouth / 12) * 100) / 100).toString())
const mouth = (diffYear % year) * 12
return year + '年' + (mouth ? mouth + '月' : '')
} else {
return Math.floor(diffMouth) + '月'
}
} else if (diffValue >= 8.64e7) {
const d = parseInt((diffValue / 1000 / 60 / 60 / 24).toString())
return d + '天'
} else {
return endTime
}
}
19. bytesToSize
export const bytesToSize = (size) => {
if (!size) return '0.00';
const pow1024 = (num) => Math.pow(1024, num)
if (size < pow1024(1)) return size + ' B';
if (size < pow1024(2)) return (size / pow1024(1)).toFixed(2) + ' KB';
if (size < pow1024(3)) return (size / pow1024(2)).toFixed(2) + ' MB';
if (size < pow1024(4)) return (size / pow1024(3)).toFixed(2) + ' GB';
return (size / pow1024(4)).toFixed(2) + ' TB'
}
20. 用js实现可终止的轮询请求
- 按照需要选择是否立即发起请求再进入轮询
- 上一次的请求响应后到了指定的时间间隔后再继续执行下一次请求
- 当轮询的请求发生报错的时候应该停止轮询
- 被停止的轮询可以根据需要再次发起轮询
/**
* @descripting 轮询功能
* @param {Function} callback 回调事件
* @param {Number} interval 轮询间隔时间
*/
export const pollingHttp = (callback, interval = 2000) => {
let timer, isStop = false
const stop = () => {
isStop = true
clearTimeout(timer)
}
const start = async () => {
isStop = false
await loopEvent()
}
const loopEvent = async () => {
try {
await callback(stop)
} catch (err) {
throw new Error('轮询出错：', err)
}
if (isStop) return
return (timer = setTimeout(loopEvent, interval))
}
return { start, stop }
}
模拟请求使用
import { pollingHttp } from '@/utils/utilTool'
const arr = ref<any[]>([])
const intervalManager = pollingHttp(async (stop) => {
const res: any = await api.hostmanage({ curPage: 1, pageSize: 10 }, 'get')
if (res?.code === 0) {
const { data, durationSecond } = res.data
arr.value.push(...data)
console.log(arr, 'res')
if (durationSecond === 100) {
stop()
}
}
}
}, 3000)
21. 一维数组将相同id放置到一个对象内，组成新数组
formatterDataSource(data) {
const groupedData = data.reduce((acc, curr) => {
const id = curr.graphType === 8 ? curr.serverMeta?.id : false ;
if (!id) {
return acc;
}
if (!acc[id]) {
acc[id] = [];
}
acc[id].push(curr);
return acc;
}, {});
const newData = Object.values(groupedData).map((group) => {
if (group.length === 1) {
return group[0];
}
const obj = { graphType: 11.11, ...group[0] };
group.forEach((item, index) => {obj[index] = item });
return obj;
});
return [ ...data, ...newData]
};
22. 获取天、周、本月、上月时间戳
getCurrentDateTime() {
const currentNowDate = Math.round(Date.now() / 1000)
const now = new Date();
now.setHours(0, 0, 0, 0);
const firstDayOfMonth = new Date(now.getFullYear(), now.getMonth(), 1); // 当前月1号的时间戳
const firstDayTimestamp = Math.floor(firstDayOfMonth.getTime() / 1000); // 当前月时间
const lastMonthFirstDay = new Date(now.getFullYear(), now.getMonth() - 1, 1);
const lastMonthLastDay = new Date(now.getFullYear(), now.getMonth(), 0);
const lastMonthFirstDayTimestamp = Math.floor(lastMonthFirstDay.getTime() / 1000); // 上个月1号的时间戳
const lastMonthLastDayTimestamp = Math.floor(lastMonthLastDay.getTime() / 1000) + 86400; // 上个月最后一天的时间戳
this.startDateTime = {
1: [currentNowDate - 8.64e4, currentNowDate],
2: [currentNowDate - 8.64e4 * 7, currentNowDate],
3: [firstDayTimestamp, currentNowDate],
4: [lastMonthFirstDayTimestamp, lastMonthLastDayTimestamp]
}
},
