本文最后更新于 841 天前，其中的信息可能已经有所发展或是发生改变。
1、输入一个值，返回其数据类型
function type(para) {
return Object.prototype.toString.call(para)
}
2、数组去重
function unique1(arr) {
return [...new Set(arr)]
}
function unique2(arr) {
var obj = {};
return arr.filter(ele => {
if (!obj[ele]) {
obj[ele] = true;
return true;
}
})
}
function unique3(arr) {
var result = [];
arr.forEach(ele => {
if (result.indexOf(ele) == -1) {
result.push(ele)
}
})
return result;
}
3、字符串去重
String.prototype.unique = function () {
var obj = {},
str = '',
len = this.length;
for (var i = 0; i < len; i++) {
if (!obj[this[i]]) {
str += this[i];
obj[this[i]] = true;
}
}
return str;
}
//去除连续的字符串
function uniq(str) {
return str.replace(/(\\wangyongjie)\\1+/g, '$1')
}
4、深拷贝 浅拷贝
function deepClone(obj, result) {
var result = result || {};
for (var prop in obj) {
if (obj.hasOwnProperty(prop)) {
if (typeof obj[prop] == 'object' && obj[prop] !== null) {
if (Object.prototype.toString.call(obj[prop]) == '[object Object]') {
result[prop] = {};
} else {
result[prop] = [];
}
deepClone(obj[prop], result[prop])
} else {
result[prop] = obj[prop]
}
}
}
return result;
}
function deepClone(target) {
if (typeof (target) !== 'object') {
return target;
}
var result;
if (Object.prototype.toString.call(target) == '[object Array]') {
result = []
} else {
result = {};
}
for (var prop in target) {
if (target.hasOwnProperty(prop)) {
result[prop] = deepClone(target[prop])
}
}
return result;
}
var o1 = jsON.parse(jsON.stringify(obj1));
5、reverse底层原理和扩展
Array.prototype.myReverse = function () {
var len = this.length;
for (var i = 0; i < len; i++) {
var temp = this[i];
this[i] = this[len - 1 - i];
this[len - 1 - i] = temp;
}
return this;
}
6、圣杯模式的继承
function inherit(Target, Origin) {
function F() {};
F.prototype = Origin.prototype;
Target.prototype = new F();
Target.prototype.constructor = Target;
Target.prop.uber = Origin.prototype;
}
7、找出字符串中第一次只出现一次的字母
String.prototype.firstAppear = function () {
var obj = {},
len = this.length;
for (var i = 0; i < len; i++) {
if (obj[this[i]]) {
obj[this[i]]++;
} else {
obj[this[i]] = 1;
}
}
for (var prop in obj) {
if (obj[prop] == 1) {
return prop;
}
}
}
8、找元素的第n级父元素
function parents(ele, n) {
while (ele && n) {
ele = ele.parentElement ? ele.parentElement : ele.parentNode;
n
}
return ele;
}
9、 返回元素的第n个兄弟节点
function retSibling(e, n) {
while (e && n) {
if (n > 0) {
if (e.nextElementSibling) {
e = e.nextElementSibling;
} else {
for (e = e.nextSibling; e && e.nodeType !== 1; e = e.nextSibling);
}
n--;
} else {
if (e.previousElementSibling) {
e = e.previousElementSibling;
} else {
for (e = e.previousElementSibling; e && e.nodeType !== 1; e = e.previousElementSibling);
}
n++;
}
}
return e;
}
10、封装mychildren，解决浏览器的兼容问题
function myChildren(e) {
var children = e.childNodes,
arr = [],
len = children.length;
for (var i = 0; i < len; i++) {
if (children[i].nodeType === 1) {
arr.push(children[i])
}
}
return arr;
}
11、判断元素有没有子元素
function hasChildren(e) {
var children = e.childNodes,
len = children.length;
for (var i = 0; i < len; i++) {
if (children[i].nodeType === 1) {
return true;
}
}
return false;
}
12、我一个元素插入到另一个元素的后面
Element.prototype.insertAfter = function (target, elen) {
var nextElen = elen.nextElenmentSibling;
if (nextElen == null) {
this.appendChild(target);
} else {
this.insertBefore(target, nextElen);
}
}
13、返回当前的时间（年月日时分秒）
function getDateTime() {
var date = new Date(),
year = date.getFullYear(),
month = date.getMonth() + 1,
day = date.getDate(),
hour = date.getHours() + 1,
minute = date.getMinutes(),
second = date.getSeconds();
month = checkTime(month);
day = checkTime(day);
hour = checkTime(hour);
minute = checkTime(minute);
second = checkTime(second);
function checkTime(i) {
if (i < 10) {
i = "0" + i;
}
return i;
}
return "" + year + "年" + month + "月" + day + "日" + hour + "时" + minute + "分" + second + "秒"
}
14、获得滚动条的滚动距离
function getScrollOffset() {
if (window.pageXOffset) {
return {
x: window.pageXOffset,
y: window.pageYOffset
}
} else {
return {
x: document.body.scrollLeft + document.documentElement.scrollLeft,
y: document.body.scrollTop + document.documentElement.scrollTop
}
}
}
15、获得视口的尺寸
function getViewportOffset() {
if (window.innerWidth) {
return {
w: window.innerWidth,
h: window.innerHeight
}
} else {
if (document.compatMode === "BackCompat") {
return {
w: document.body.clientWidth,
h: document.body.clientHeight
}
} else {
return {
w: document.documentElement.clientWidth,
h: document.documentElement.clientHeight
}
}
}
}
16、获取任一元素的任意属性
function getStyle(elem, prop) {
return window.getComputedStyle ? window.getComputedStyle(elem, null)[prop] : elem.currentStyle[prop]
}
17、绑定事件的兼容代码
function addEvent(elem, type, handle) {
if (elem.addEventListener) {
elem.addEventListener(type, handle, false);
} else if (elem.attachEvent) {
elem.attachEvent('on' + type, function () {
handle.call(elem);
})
} else {
elem['on' + type] = handle;
}
}
18、解绑事件
function removeEvent(elem, type, handle) {
if (elem.removeEventListener) {
elem.removeEventListener(type, handle, false);
} else if (elem.detachEvent) {
elem.detachEvent('on' + type, handle);
} else {
elem['on' + type] = null;
}
}
19、取消冒泡的兼容代码
function stopBubble(e) {
if (e && e.stopPropagation) {
e.stopPropagation();
} else {
window.event.cancelBubble = true;
}
}
20、检验字符串是否是回文
function isPalina(str) {
if (Object.prototype.toString.call(str) !== '[object String]') {
return false;
}
var len = str.length;
for (var i = 0; i < len / 2; i++) {
if (str[i] != str[len - 1 - i]) {
return false;
}
}
return true;
}
21、检验字符串是否是回文
function isPalindrome(str) {
str = str.replace(/\\W/g, '').toLowerCase();
console.log(str)
return (str == str.split('').reverse().join(''))
}
22、兼容getElementsByClassName方法
Element.prototype.getElementsByClassName = Document.prototype.getElementsByClassName = function (_className) {
var allDomArray = document.getElementsByTagName('*');
var lastDomArray = [];
function trimSpace(strClass) {
var reg = /\\s+/g;
return strClass.replace(reg, ' ').trim()
}
for (var i = 0; i < allDomArray.length; i++) {
var classArray = trimSpace(allDomArray[i].className).split(' ');
for (var j = 0; j < classArray.length; j++) {
if (classArray[j] == _className) {
lastDomArray.push(allDomArray[i]);
break;
}
}
}
return lastDomArray;
}
23、运动函数
function animate(obj, json, callback) {
clearInterval(obj.timer);
var speed,
current;
obj.timer = setInterval(function () {
var lock = true;
for (var prop in json) {
if (prop == 'opacity') {
current = parseFloat(window.getComputedStyle(obj, null)[prop]) * 100;
} else {
current = parseInt(window.getComputedStyle(obj, null)[prop]);
}
speed = (json[prop] - current) / 7;
speed = speed > 0 ? Math.ceil(speed) : Math.floor(speed);
if (prop == 'opacity') {
obj.style[prop] = (current + speed) / 100;
} else {
obj.style[prop] = current + speed + 'px';
}
if (current != json[prop]) {
lock = false;
}
}
if (lock) {
clearInterval(obj.timer);
typeof callback == 'function' ? callback() : '';
}
}, 30)
}
24、弹性运动
function ElasticMovement(obj, target) {
clearInterval(obj.timer);
var iSpeed = 40,
a, u = 0.8;
obj.timer = setInterval(function () {
a = (target - obj.offsetLeft) / 8;
iSpeed = iSpeed + a;
iSpeed = iSpeed * u;
if (Math.abs(iSpeed) <= 1 && Math.abs(a) <= 1) {
console.log('over')
clearInterval(obj.timer);
obj.style.left = target + 'px';
} else {
obj.style.left = obj.offsetLeft + iSpeed + 'px';
}
}, 30);
}
25、封装自己的forEach方法
Array.prototype.myForEach = function (func, obj) {
var len = this.length;
var _this = arguments[1] ? arguments[1] : window;
for (var i = 0; i < len; i++) {
func.call(_this, this[i], i, this)
}
}
26、封装自己的filter方法
Array.prototype.myFilter = function (func, obj) {
var len = this.length;
var arr = [];
var _this = arguments[1] || window;
for (var i = 0; i < len; i++) {
func.call(_this, this[i], i, this) && arr.push(this[i]);
}
return arr;
}
27、数组map方法
Array.prototype.myMap = function (func) {
var arr = [];
var len = this.length;
var _this = arguments[1] || window;
for (var i = 0; i < len; i++) {
arr.push(func.call(_this, this[i], i, this));
}
return arr;
}
28、数组every方法
Array.prototype.myEvery = function (func) {
var flag = true;
var len = this.length;
var _this = arguments[1] || window;
for (var i = 0; i < len; i++) {
if (func.apply(_this, [this[i], i, this]) == false) {
flag = false;
break;
}
}
return flag;
}
29、数组reduce方法
Array.prototype.myReduce = function (func, initialValue) {
var len = this.length,
nextValue,
i;
if (!initialValue) {
nextValue = this[0];
i = 1;
} else {
nextValue = initialValue;
i = 0;
}
for (; i < len; i++) {
nextValue = func(nextValue, this[i], i, this);
}
return nextValue;
}
30、获取url中的参数（1）
function getWindonHref() {
var sHref = window.location.href;
var args = sHref.split('?');
if (args[0] === sHref) {
return '';
}
var hrefarr = args[1].split('#')[0].split('&');
var obj = {};
for (var i = 0; i < hrefarr.length; i++) {
hrefarr[i] = hrefarr[i].split('=');
obj[hrefarr[i][0]] = hrefarr[i][1];
}
return obj;
}
31、数组排序
function quickArr(arr) {
if (arr.length <= 1) {
return arr;
}
var left = [],
right = [];
var pIndex = Math.floor(arr.length / 2);
var p = arr.splice(pIndex, 1)[0];
for (var i = 0; i < arr.length; i++) {
if (arr[i] <= p) {
left.push(arr[i]);
} else {
right.push(arr[i]);
}
}
return quickArr(left).concat([p], quickArr(right));
}
function bubbleSort(arr) {
for (var i = 0; i < arr.length - 1; i++) {
for (var j = i + 1; j < arr.length; j++) {
if (arr[i] > arr[j]) {
var temp = arr[i];
arr[i] = arr[j];
arr[j] = temp;
}
}
}
return arr;
}
function bubbleSort(arr) {
var len = arr.length;
for (var i = 0; i < len - 1; i++) {
for (var j = 0; j < len - 1 - i; j++) {
if (arr[j] > arr[j + 1]) {
var temp = arr[j];
arr[j] = arr[j + 1];
arr[j + 1] = temp;
}
}
}
return arr;
}
32、遍历Dom树
function traverse(element, callback) {
callback(element);
var list = element.children;
for (var i = 0; i < list.length; i++) {
traverse(list[i], callback);
}
}
33、原生js封装ajax（1）
function ajax(method, url, callback, data, flag) {
var xhr;
flag = flag || true;
method = method.toUpperCase();
if (window.XMLHttpRequest) {
xhr = new XMLHttpRequest();
} else {
xhr = new ActiveXObject('Microsoft.XMLHttp');
}
xhr.onreadystatechange = function () {
if (xhr.readyState == 4 && xhr.status == 200) {
console.log(2)
callback(xhr.responseText);
}
}
if (method == 'GET') {
var date = new Date(),
timer = date.getTime();
xhr.open('GET', url + '?' + data + '&timer' + timer, flag);
xhr.send()
} else if (method == 'POST') {
xhr.open('POST', url, flag);
xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
xhr.send(data);
}
}
34、异步加载script
function loadScript(url, callback) {
var oscript = document.createElement('script');
if (oscript.readyState) {
oscript.onreadystatechange = function () {
if (oscript.readyState === 'complete' || oscript.readyState === 'loaded') {
callback();
}
}
} else {
oscript.onload = function () {
callback()
};
}
oscript.src = url;
document.body.appendChild(oscript);
}
35、cookie管理
var cookie = {
set: function (name, value, time) {
document.cookie = name + '=' + value + '; max-age=' + time;
return this;
},
remove: function (name) {
return this.setCookie(name, '', -1);
},
get: function (name, callback) {
var allCookieArr = document.cookie.split('; ');
for (var i = 0; i < allCookieArr.length; i++) {
var itemCookieArr = allCookieArr[i].split('=');
if (itemCookieArr[0] === name) {
return itemCookieArr[1]
}
}
return undefined;
}
}
36、实现bind()方法
Function.prototype.myBind = function (target) {
var target = target || window;
var _args1 = [].slice.call(arguments, 1);
var self = this;
var temp = function () {};
var F = function () {
var _args2 = [].slice.call(arguments, 0);
var parasArr = _args1.concat(_args2);
return self.apply(this instanceof temp ? this : target, parasArr)
}
temp.prototype = self.prototype;
F.prototype = new temp();
return F;
}
37、实现call()方法
Function.prototype.myCall = function () {
var ctx = arguments[0] || window;
ctx.fn = this;
var args = [];
for (var i = 1; i < arguments.length; i++) {
args.push(arguments[i])
}
var result = ctx.fn(...args);
delete ctx.fn;
return result;
}
38、实现apply()方法
Function.prototype.myApply = function () {
var ctx = arguments[0] || window;
ctx.fn = this;
if (!arguments[1]) {
var result = ctx.fn();
delete ctx.fn;
return result;
}
var result = ctx.fn(...arguments[1]);
delete ctx.fn;
return result;
}
39、防抖
function debounce(handle, delay) {
var timer = null;
return function () {
var _self = this,
_args = arguments;
clearTimeout(timer);
timer = setTimeout(function () {
handle.apply(_self, _args)
}, delay)
}
}
40、节流
function throttle(handler, wait) {
var lastTime = 0;
return function (e) {
var nowTime = new Date().getTime();
if (nowTime - lastTime > wait) {
handler.apply(this, arguments);
lastTime = nowTime;
}
}
}
41、requestAnimFrame兼容性方法
window.requestAnimFrame = (function () {
return window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
function (callback) {
window.setTimeout(callback, 1000 / 60);
};
})();
42、cancelAnimFrame兼容性方法
window.cancelAnimFrame = (function () {
return window.cancelAnimationFrame ||
window.webkitCancelAnimationFrame ||
window.mozCancelAnimationFrame ||
function (id) {
window.clearTimeout(id);
};
})();
43、jsonp底层方法
function jsonp(url, callback) {
var oscript = document.createElement('script');
if (oscript.readyState) {
oscript.onreadystatechange = function () {
if (oscript.readyState === 'complete' || oscript.readyState === 'loaded') {
callback();
}
}
} else {
oscript.onload = function () {
callback()
};
}
oscript.src = url;
document.body.appendChild(oscript);
}
44、获取url上的参数（2）
function getUrlParam(sUrl, sKey) {
var result = {};
sUrl.replace(/(\\w+)=(\\w+)(?=[&|#])/g, function (ele, key, val) {
if (!result[key]) {
result[key] = val;
} else {
var temp = result[key];
result[key] = [].concat(temp, val);
}
})
if (!sKey) {
return result;
} else {
return result[sKey] || '';
}
}
45、格式化时间
function formatDate(t, str) {
var obj = {
yyyy: t.getFullYear(),
yy: ("" + t.getFullYear()).slice(-2),
M: t.getMonth() + 1,
MM: ("0" + (t.getMonth() + 1)).slice(-2),
d: t.getDate(),
dd: ("0" + t.getDate()).slice(-2),
H: t.getHours(),
HH: ("0" + t.getHours()).slice(-2),
h: t.getHours() % 12,
hh: ("0" + t.getHours() % 12).slice(-2),
m: t.getMinutes(),
mm: ("0" + t.getMinutes()).slice(-2),
s: t.getSeconds(),
ss: ("0" + t.getSeconds()).slice(-2),
w: ['日', '一', '二', '三', '四', '五', '六'][t.getDay()]
};
return str.replace(/([a-z]+)/ig, function ($1) {
return obj[$1]
});
}
46、验证邮箱的正则表达式
function isAvailableEmail(sEmail) {
var reg = /^([\\w+\\.])+@\\w+([.]\\w+)+$/
return reg.test(sEmail)
}
47、函数柯里化
function curryIt(fn) {
var length = fn.length,
args = [];
var result = function (arg) {
args.push(arg);
length--;
if (length <= 0) {
return fn.apply(this, args);
} else {
return result;
}
}
return result;
}
48、大数相加
function sumBigNumber(a, b) {
var res = '',
temp = 0;
a = a.split('');
b = b.split('');
while (a.length || b.length || temp) {
temp += ~~a.pop() + ~~b.pop();
res = (temp % 10) + res;
temp = temp > 9;
}
return res.replace(/^0+/, '');
}
49、单例模式
function getSingle(func) {
var result;
return function () {
if (!result) {
result = new func(arguments);
}
return result;
}
}
50、加载js || css || style
const loadRes = function(name, type, fn) {
let ref
if (type === 'js') {
ref = document.createElement('script')
ref.setAttribute('type', 'text/JavaScript')
ref.setAttribute('src', name)
} else if (type === 'css') {
ref = document.createElement('link')
ref.setAttribute('rel', 'stylesheet')
ref.setAttribute('type', 'text/css')
ref.setAttribute('href', name)
} else if (type === 'style') {
ref = document.createElement('style')
ref.innerhtml = name
}
if (typeof ref !== 'undefined') {
document.getElementsByTagName('head')[0].appendChild(ref)
ref.onload = function() {
typeof fn === 'function' && fn()
}
}
}
51、获取url参数（3）
const getUrlParam = function(name) {
let reg = new RegExp('(^|&?)' + name + '=([^&]*)(&|$)', 'i')
let r = window.location.href.substr(1).match(reg)
if (r != null) {
return decodeURI(r[2])
}
return undefined
}
52、本地存储
const store = {
set: function(name, value, day) {
let d = new Date()
let time = 0
day = (typeof(day) === 'undefined' || !day) ? 1 : day
time = d.setHours(d.getHours() + (24 * day))
localStorage.setItem(name, JSON.stringify({
data: value,
time: time
}))
},
get: function(name) {
let data = localStorage.getItem(name)
if (!data) {
return null
}
let obj = JSON.parse(data)
if (new Date().getTime() > obj.time) {
localStorage.removeItem(name)
return null
} else {
return obj.data
}
},
clear: function(name) {
if (name) {
localStorage.removeItem(name)
} else {
localStorage.clear()
}
}
}
53、cookie操作【set，get，del】
const cookie = {
set: function(name, value, day) {
let oDate = new Date()
oDate.setDate(oDate.getDate() + (day || 30))
document.cookie = name + '=' + value + ';expires=' + oDate + "; path=/;"
},
get: function(name) {
let str = document.cookie
let arr = str.split('; ')
for (let i = 0; i < arr.length; i++) {
let newArr = arr[i].split('=')
if (newArr[0] === name) {
return newArr[1]
}
}
},
del: function(name) {
this.set(name, '', -1)
}
}
54、Js获取元素样式【支持内联】
const getRealStyle = function(obj, styleName) {
var realStyle = null
if (obj.currentStyle) {
realStyle = obj.currentStyle[styleName]
} else if (window.getComputedStyle) {
realStyle = window.getComputedStyle(obj, null)[styleName]
}
return realStyle
}
55、时间格式化
const formatDate = function(fmt, date) {
if (typeof date !== 'object') {
date = !date ? new Date() : new Date(date)
}
var o = {
'M+': date.getMonth() + 1,
'd+': date.getDate(),
'h+': date.getHours(),
'm+': date.getMinutes(),
's+': date.getSeconds(),
'q+': Math.floor((date.getMonth() + 3) / 3),
'S': date.getMilliseconds()
}
if (/(y+)/.test(fmt)) {
fmt = fmt.replace(RegExp.$1, (date.getFullYear() + '').substr(4 - RegExp.$1.length))
}
for (var k in o) {
if (new RegExp('(' + k + ')').test(fmt)) {
fmt = fmt.replace(RegExp.$1, (RegExp.$1.length === 1) ? (o[k]) : (('00' + o[k]).substr(('' + o[k]).length)))
}
}
return fmt
}
56、原生ajax操作（2）
const ajax = function(conf) {
let url = conf.url,
data = conf.data,
senData = [],
async = conf.async !== undefined ? conf.async : true,
type = conf.type || 'get',
dataType = conf.dataType || 'json',
contenType = conf.contenType || 'application/x-www-form-urlencoded',
success = conf.success,
error = conf.error,
isForm = conf.isForm || false,
header = conf.header || {},
xhr = ''
if (data == null) {
senData = ''
} else if (typeof data === 'object' && !isForm) {
for (var k in data) {
senData.push(encodeURIComponent(k) + '=' + encodeURIComponent(data[k]))
}
senData = senData.join('&')
} else {
senData = data
}
try {
xhr = new ActiveXObject('microsoft.xmlhttp')
} catch (e1) {
try {
xhr = new XMLHttpRequest()
} catch (e2) {
if (error != null) {
error('不支持ajax请求')
}
}
};
xhr.open(type, type !== 'get' ? url : url + '?' + senData, async)
if (type !== 'get' && !isForm) {
xhr.setRequestHeader('content-type', contenType)
}
for (var h in header) {
xhr.setRequestHeader(h, header[h])
}
xhr.send(type !== 'get' ? senData : null)
xhr.onreadystatechange = function() {
if (xhr.readyState === 4) {
if (xhr.status >= 200 && xhr.status < 300) {
if (dataType === 'json' && success != null) {
let res = ''
try {
res = eval('(' + xhr.responseText + ')')
} catch (e) {
console.log(e)
}
success(res)
};
} else {
if (error != null) {
error('通讯失败!' + xhr.status)
}
}
}
}
}
57、fetch请求的封装
const fetch = function(url, setting) {
let opts = {
method: (setting.method || 'GET').toUpperCase(),
headers: setting.headers || {},
credentials: setting.credentials || true,
body: setting.body || {},
mode: setting.mode || 'no-cors',
redirect: setting.redirect || 'follow',
cache: setting.cache || 'default'
}
let dataType = setting.dataType || 'json'
let data = setting.data || ''
let paramsFormat = function(obj) {
var str = ''
for (var i in obj) {
str += \`${i}\=${obj[i]}&\`
}
return str.split('').slice(0, -1).join('')
}
if (opts.method === 'GET') {
url = url + (data ? \`?${paramsFormat(data)}\` : '')
} else {
setting.body = data || {}
}
return new Promise((resolve, reject) => {
fetch(url, opts).then(async res => {
let data = dataType === 'text' ? await res.text() : dataType === 'blob' ? await res.blob() : await res.json()
resolve(data)
}).catch(e => {
reject(e)
})
})
}
58、设备判断：android、ios、web
const isDevice = function() {
var ua = navigator.userAgent.toLowerCase()
if (ua.match(/iPhone\\sOS/i) === 'iphone os' || ua.match(/iPad/i) === 'ipad') {
return 'iOS'
}
if (ua.match(/Android/i) === 'android') {
return 'Android'
}
return 'Web'
}
59、判断是否为微信
const isWx = function() {
var ua = window.navigator.userAgent.toLowerCase()
if (ua.match(/MicroMessenger/i) === 'micromessenger') {
return true
}
return false
}
60、文本复制功能
const copyTxt = function(text, fn) {
if (typeof document.execCommand !== 'function') {
console.log('复制失败，请长按复制')
return
}
var dom = document.createElement('textarea')
dom.value = text
dom.setAttribute('style', 'display: block;width: 1px;height: 1px;')
document.body.appendChild(dom)
dom.select()
var result = document.execCommand('copy')
document.body.removeChild(dom)
if (result) {
console.log('复制成功')
typeof fn === 'function' && fn()
return
}
if (typeof document.createRange !== 'function') {
console.log('复制失败，请长按复制')
return
}
var range = document.createRange()
var div = document.createElement('div')
div.innerhtml = text
div.setAttribute('style', 'height: 1px;fontSize: 1px;overflow: hidden;')
document.body.appendChild(div)
range.selectNode(div)
var selection = window.getSelection()
console.log(selection)
if (selection.rangeCount > 0) {
selection.removeAllRanges()
}
selection.addRange(range)
document.execCommand('copy')
typeof fn === 'function' && fn()
console.log('复制成功')
}
61、判断是否是一个数组
const isArray = function(arr) {
return Object.prototype.toString.call(arr) === '[object Array]'
}
62、判断两个数组是否相等
const arrayEqual = function(arr1, arr2) {
if (arr1 === arr2) return true;
if (arr1.length != arr2.length) return false;
for (let i = 0; i < arr1.length; ++i) {
if (arr1[i] !== arr2[i]) return false;
}
return true;
}
63、时间与时间戳转换
const stamp = {
getTime: function(time) {
let date = time ? new Date(time) : new Date()
return Math.round(date.getTime() / 1000)
},
timeToStr: function(time, fmt) {
return new Date(time * 1000).pattern(fmt || 'yyyy-MM-dd')
}
}
64、常用正则验证
const checkStr = function(str, type) {
switch (type) {
case 'phone':
return /^1[3|4|5|6|7|8|9][0-9]{9}$/.test(str)
case 'tel':
return /^(0\\d{2,3}-\\d{7,8})(-\\d{1,4})?$/.test(str)
case 'card':
return /(^\\d{15}$)|(^\\d{18}$)|(^\\d{17}(\\d|X|x)$)/.test(str)
case 'pwd':
return /^[a-zA-Z]\\w{5,17}$/.test(str)
case 'postal':
return /[1-9]\\d{5}(?!\\d)/.test(str)
case 'QQ':
return /^[1-9][0-9]{4,9}$/.test(str)
case 'email':
return /^[\\w-]+(\\.[\\w-]+)*@[\\w-]+(\\.[\\w-]+)+$/.test(str)
case 'money':
return /^\\d*(?:\\.\\d{0,2})?$/.test(str)
case 'URL':
return /(http|ftp|https):\\/\\/[\\w\-_]+(\\.[\\w\-_]+)+([\\w\-\\.,@?^=%&:/~\\+#]*[\\w\-\\@?^=%&/~\\+#])?/.test(str)
case 'IP':
return /((?:(?:25[0-5]|2[0-4]\\d|[01]?\\d?\\d)\\.){3}(?:25[0-5]|2[0-4]\\d|[01]?\\d?\\d))/.test(str)
case 'date':
return /^(\\d{4})\-(\\d{2})\-(\\d{2}) (\\d{2})(?:\\:\\d{2}|:(\\d{2}):(\\d{2}))$/.test(str) ||
/^(\\d{4})\-(\\d{2})\-(\\d{2})$/.test(str)
case 'number':
return /^[0-9]$/.test(str)
case 'english':
return /^[a-zA-Z]+$/.test(str)
case 'chinese':
return /^[\\u4E00-\\u9FA5]+$/.test(str)
case 'lower':
return /^[a-z]+$/.test(str)
case 'upper':
return /^[A-Z]+$/.test(str)
case 'HTML':
return /<("[^"]*"|'[^']*'|[^'">])*>/.test(str)
default:
return true
}
}
65、是否为PC端
const isPC = function() {
let userAgentInfo = navigator.userAgent
let Agents = ['Android', 'iPhone', 'SymbianOS', 'Windows Phone', 'iPad', 'iPod']
let flag = true
for (let v = 0; v < Agents.length; v++) {
if (userAgentInfo.indexOf(Agents[v]) > 0) {
flag = false
break
}
}
return flag
}
66、去除字符串空格
const trim = function(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
}
}
67、字符串大小写转换
const changeCase = function(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
}
}
68、过滤html代码
const filterTag = function(str) {
str = str.replace(/&/ig, '&')
str = str.replace(/</ig, '<')
str = str.replace(/>/ig, '>')
str = str.replace(' ', ' ')
return str
}
69、生成随机数范围
const random = function(min, max) {
if (arguments.length === 2) {
return Math.floor(min + Math.random() * ((max + 1) - min))
} else {
return null
}
}
70、阿拉伯数字转中文大写数字
const numberToChinese = function(num) {
let AA = new Array('零', '一', '二', '三', '四', '五', '六', '七', '八', '九', '十')
let BB = new Array('', '十', '百', '仟', '萬', '億', '点', '')
let a = ('' + num).replace(/(^0*)/g, '').split('.')
let k = 0
let re = ''
for (let 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) {
re += BB[6]
for (let 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
}
71、原生dom操作
const dom = {
$: function(selector) {
let type = selector.substring(0, 1)
if (type === '#') {
if (document.querySelecotor) return document.querySelector(selector)
return document.getElementById(selector.substring(1))
} else if (type === '.') {
if (document.querySelecotorAll) return document.querySelectorAll(selector)
return document.getElementsByClassName(selector.substring(1))
} else {
return document['querySelectorAll' ? 'querySelectorAll' : 'getElementsByTagName'](selector)
}
},
hasClass: function(ele, name) {
return ele.className.match(new RegExp('(\\s|^)' + name + '(\\s|$)'))
},
addClass: function(ele, name) {
if (!this.hasClass(ele, name)) ele.className += ' ' + name
},
removeClass: function(ele, name) {
if (this.hasClass(ele, name)) {
let reg = new RegExp('(\\s|^)' + name + '(\\s|$)')
ele.className = ele.className.replace(reg, '')
}
},
replaceClass: function(ele, newName, oldName) {
this.removeClass(ele, oldName)
this.addClass(ele, newName)
},
siblings: function(ele) {
console.log(ele.parentNode)
let chid = ele.parentNode.children,
eleMatch = []
for (let i = 0, len = chid.length; i < len; i++) {
if (chid[i] !== ele) {
eleMatch.push(chid[i])
}
}
return eleMatch
},
getByStyle: function(obj, name) {
if (obj.currentStyle) {
return obj.currentStyle[name]
} else {
return getComputedStyle(obj, false)[name]
}
},
domToStirng: function(htmlDOM) {
var div = document.createElement('div')
div.appendChild(htmlDOM)
return div.innerHTML
},
stringToDom: function(htmlString) {
var div = document.createElement('div')
div.innerHTML = htmlString
return div.children[0]
}
}
72、判断图片加载完成
const imgLoadAll = function(arr, callback) {
let arrImg = []
for (let i = 0; i < arr.length; i++) {
let img = new Image()
img.src = arr[i]
img.onload = function() {
arrImg.push(this)
if (arrImg.length == arr.length) {
callback && callback()
}
}
}
}
73、音频加载完成操作
const loadAudio = function(src, callback) { // 音频加载
var audio = new Audio(src)
audio.onloadedmetadata = callback
audio.src = src
}
74、光标所在位置插入字符
const insertAtCursor = function(dom, val) { // 光标所在位置插入字符
if (document.selection) {
dom.focus()
let sel = document.selection.createRange()
sel.text = val
sel.select()
} else if (dom.selectionStart || dom.selectionStart == '0') {
let startPos = dom.selectionStart
let endPos = dom.selectionEnd
let restoreTop = dom.scrollTop
dom.value = dom.value.substring(0, startPos) + val + dom.value.substring(endPos, dom.value.length)
if (restoreTop > 0) {
dom.scrollTop = restoreTop
}
dom.focus()
dom.selectionStart = startPos + val.length
dom.selectionEnd = startPos + val.length
} else {
dom.value += val
dom.focus()
}
}
75、图片地址转base64
const getBase64 = function(img) { //传入图片路径，返回base64，使用getBase64(url).then(function(base64){},function(err){});
let getBase64Image = function(img, width, height) { //width、height调用时传入具体像素值，控制大小,不传则默认图像大小
let canvas = document.createElement("canvas");
canvas.width = width ? width : img.width;
canvas.height = height ? height : img.height;
let ctx = canvas.getContext("2d");
ctx.drawImage(img, 0, 0, canvas.width, canvas.height);
let dataURL = canvas.toDataURL();
return dataURL;
}
let image = new Image();
image.crossOrigin = '';
image.src = img;
let deferred = $.Deferred();
if (img) {
image.onload = function() {
deferred.resolve(getBase64Image(image));
}
return deferred.promise();
}
}
76、base64图片下载功能
const downloadFile = function(base64, fileName) {
let base64ToBlob = function(code) {
let parts = code.split(';base64,');
let contentType = parts[0].split(':')[1];
let raw = window.atob(parts[1]);
let rawLength = raw.length;
let uInt8Array = new Uint8Array(rawLength);
for (let i = 0; i < rawLength; ++i) {
uInt8Array[i] = raw.charCodeAt(i);
}
return new Blob([uInt8Array], {
type: contentType
});
};
let aLink = document.createElement('a');
let blob = base64ToBlob(base64);
let evt = document.createEvent("HTMLEvents");
evt.initEvent("click", true, true);
aLink.download = fileName;
aLink.href = URL.createObjectURL(blob);
aLink.click();
}
77、浏览器是否支持webP格式图片
const isSupportWebP = function() {
return !![].map && document.createElement('canvas').toDataURL('image/webp').indexOf('data:image/webp') == 0;
}
78、url参数转对象
const parseQueryString = function(url) {
url = !url ? window.location.href : url;
if (url.indexOf('?') === -1) {
return {};
}
let search = url[0] === '?' ? url.substr(1) : url.substring(url.lastIndexOf('?') + 1);
if (search === '') {
return {};
}
search = search.split('&');
let query = {};
for (let i = 0; i < search.length; i++) {
let pair = search[i].split('=');
query[decodeURIComponent(pair[0])] = decodeURIComponent(pair[1] || '');
}
return query;
}
79、对象序列化【对象转url参数】
const stringfyQueryString = function(obj) {
if (!obj) return '';
let pairs = [];
for (let key in obj) {
let value = obj[key];
if (value instanceof Array) {
for (let i = 0; i < value.length; ++i) {
pairs.push(encodeURIComponent(key + '[' + i + ']') + '=' + encodeURIComponent(value[i]));
}
continue;
}
pairs.push(encodeURIComponent(key) + '=' + encodeURIComponent(obj[key]));
}
return pairs.join('&');
}
80、H5软键盘缩回、弹起回调
const h5Resize = function(downCb, upCb) {
var clientHeight = window.innerHeight;
downCb = typeof downCb === 'function' ? downCb : function() {}
upCb = typeof upCb === 'function' ? upCb : function() {}
window.addEventListener('resize', () => {
var height = window.innerHeight;
if (height === clientHeight) {
downCb();
}
if (height < clientHeight) {
upCb();
}
});
}
81、函数防抖
const debounce = function(func, wait, immediate) {
let timeout;
return function() {
let context = this;
let args = arguments;
if (timeout) clearTimeout(timeout);
if (immediate) {
var callNow = !timeout;
timeout = setTimeout(() => {
timeout = null;
}, wait)
if (callNow) func.apply(context, args)
} else {
timeout = setTimeout(function() {
func.apply(context, args)
}, wait);
}
}
}
82、函数节流
const throttle = function(func, wait ,type) {
if(type===1){
let previous = 0;
}else if(type===2){
let timeout;
}
return function() {
let context = this;
let args = arguments;
if(type===1){
let now = Date.now();
if (now - previous > wait) {
func.apply(context, args);
previous = now;
}
}else if(type===2){
if (!timeout) {
timeout = setTimeout(() => {
timeout = null;
func.apply(context, args)
}, wait)
}
}
}
}
