// 数字2位转换
export function toDouble(num) {
if (num < 10) {
return '0' + num;
} else {
return num;
}
}
// 数字位数，只获取整数位
export function getNumBit(num) {
let intNum = num.toFixed(0);
return intNum.length;
}
// 动态加载js
export function loadApi(src) {
return new Promise((resolve, reject) => {
const script = document.createElement('script');
script.type = '';
script.src = src;
script.async = 'async';
document.head.appendChild(script);
script.onload = () => { resolve(); };
script.onerror = () => { reject(); };
});
}
// 动态加载css
export function loadCss(src) {
return new Promise((resolve, reject) => {
const link = document.createElement('link');
link.rel = 'stylesheet';
link.href = src;
document.head.appendChild(link);
});
}
// 对象取值
export function getVal(obj, path, returnedVal = '') {
if (!path) return returnedVal;
const pathArr = path.split('.');
let current = obj;
for (let i = 0, l = pathArr.length; i < l; i++) {
if (!current) break;
const prop = pathArr[i];
current = current[prop];
}
if (current || current === 0) {
return current;
} else {
return returnedVal;
}
}
// 冒泡排序
export function bubbleSort(arr) {
let i = arr.length - 1;
while (i > 0) {
let maxIndex = 0;
for (let j = 0; j < i; j++) {
if (arr[j] > arr[j + 1]) {
let temp = arr[j + 1];
arr[j + 1] = arr[j];
arr[j] = temp;
maxIndex = j;
}
}
i = maxIndex;
}
return arr;
};
// 通过属性值冒泡排序
export function bubbleSortByProp(arr, prop) {
let i = arr.length - 1;
while (i > 0) {
let maxIndex = 0;
for (let j = 0; j < i; j++) {
if (arr[j][prop] > arr[j + 1][prop]) {
let temp = arr[j + 1];
arr[j + 1] = arr[j];
arr[j] = temp;
maxIndex = j;
}
}
i = maxIndex;
}
return arr;
}
// 按照属性值把数组分类
export function arrClassifyByProp(arr, prop) {
let result = {};
arr.forEach(item => {
const key = item[prop];
if (result[key]) {
result[key].push(item);
} else {
result[key] = [item];
}
});
return result;
}
// 通过属性值查找数组某一项
export function findArrItemByPropVal(arr, prop, val) {
let result = null;
for (let i = 0, l = arr.length; i < l; i++) {
if (arr[i][prop] === val) {
result = arr[i];
break;
}
}
return result;
}
// 获取指定月份天数
export function getDateByMon(year, month){
let d = new Date(year, month, 0);
return d.getDate();
}
// 判断时间是不是今天
export function isTodayDate(time) {
if (time.toDateString() === new Date().toDateString()) {
return true;
} else {
return false;
}
}
// 对象判空
export function isObjEmpty(obj) {
if (obj && obj.constructor === Object) {
return Object.keys(obj).length;
}
if (obj && obj.constructor === Array) {
return obj.length;
}
}
// 扁平化对象数组
export function flatObjArr(obj) {
let result = [];
Object.keys(obj).forEach(key => {
const list = obj[key];
result = result.concat(list);
});
return result;
}
// 数组对象属性值转换映射对象 (参数 'a:b' [{a: c, b: d}] --> {c: d})
export function arrPropValToMap(arr, format) {
const pArr = format.split(':');
const p1 = pArr[0];
const p2 = pArr[1];
let res = {};
for (let i = 0, l = arr.length; i < l; i++) {
let v1 = arr[i][p1];
let v2 = arr[i][p2];
result[v1] = result[v2];
}
return res;
}
// 首字母大写
export const capitalizeFirstLetter = (string) => {
return string.charAt(0).toUpperCase() + string.slice(1);
};
// 过滤值为空字符串或者为null的参数
export function getQuery(query) {
let res = {};
for (let [key, val] of Object.entries(query)) {
if (typeof val === 'string') {
if (!val.trim() || val === 'null') continue;
} else {
if (val === null || val === undefined) continue;
}
res[key] = val;
};
return res;
}
export function isImage(fileName) {
if (typeof fileName !== 'string') return;
let name = fileName.toLowerCase();
return name.endsWith('.png') || name.endsWith('.jpeg') || name.endsWith('.jpg') || name.endsWith('.png') || name.endsWith('.bmp');
}
export function isH5Video(fileName) {
if (typeof fileName !== 'string') return;
let name = fileName.toLowerCase();
return name.endsWith('.mp4') || name.endsWith('.webm') || name.endsWith('.ogg');
}
export function isPdf(fileName) {
if (typeof fileName !== 'string') return;
let name = fileName.toLowerCase();
return name.endsWith('.pdf');
}
export function isWord(fileName) {
if (typeof fileName !== 'string') return;
let name = fileName.toLowerCase();
return name.endsWith('.doc') || name.endsWith('.docx');
}
export function isExcel(fileName) {
if (typeof fileName !== 'string') return;
let name = fileName.toLowerCase();
return name.endsWith('.xlsx') || name.endsWith('.xls');
}
export const sStorage = {
set(key, val) {
let valStr = JSON.stringify(val);
if (sessionStorage !== null) {
sessionStorage.setItem(key, valStr);
}
},
get(key) {
if (sessionStorage !== null) {
let valStr = sessionStorage.getItem(key);
return JSON.parse(valStr);
} else {
return null;
}
},
clear() {
if (sessionStorage !== null) {
sessionStorage.clear();
}
}
}
export const lStorage = {
set(key, val) {
let valStr = JSON.stringify(val);
if (localStorage !== null) {
localStorage.setItem(key, valStr);
}
},
get(key) {
if (localStorage !== null) {
let valStr = localStorage.getItem(key);
return JSON.parse(valStr);
} else {
return null;
}
},
clear() {
if (localStorage !== null) {
localStorage.clear();
}
}
};
export function openFullScreen(dom) {
let el = dom,
rfs =
el.requestFullScreen ||
el.webkitRequestFullScreen ||
el.mozRequestFullScreen ||
el.msRequestFullScreen,
wscript;
if (typeof rfs !== "undefined" && rfs) {
rfs.call(el);
return;
}
if (typeof window.ActiveXObject !== "undefined") {
wscript = new ActiveXObject("WScript.Shell");
if (wscript) {
wscript.SendKeys("{F11}");
}
}
};
export function exitFullscreen() {
if (document.exitFullscreen) {
document.exitFullscreen();
} else if (document.mozCancelFullScreen) {
document.mozCancelFullScreen();
} else if (document.webkitExitFullscreen) {
document.webkitExitFullscreen();
}
};
