阻止冒泡、默認行為、事件捕獲
/* funname preventEventPropagation
* desc 阻止冒泡事件&阻止默認行為&阻止事件捕獲
* params {name: string}參數名稱
* return {string or null}
*/
var preventEventPropagation = function(evt) {
var e = evt || window.event;
if (e) {
e.preventDefault();
e.stopPropagation();
}
return false;
};獲取地址參數
/* funname getQueryString
* desc 獲取地址參數
* params {name: string}參數名稱
* return {string or null}
*/
var getQueryString = function(name) {
var r, reg;
reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)", "i");
r = window.location.search.substr(1).match(reg);
if (r !== null) {
return r[2]; //不解碼
}
return null;
};
判斷微信環境
/*
*desc:判斷微信環境
*params：null
*/
var isInWechat = function() {
var ua = navigator.userAgent.toLowerCase();
if (ua.match(/MicroMessenger/i) == "micromessenger") {
return true;
} else {
return false;
}
};
獲取環境參數
/*
*funname:platformFn
*des:獲取環境參數
*params:
*return: [object]
*/
var platformFn = function() {
var u = navigator.userAgent,
app = navigator.appVersion;
return {
webKit: u.indexOf('AppleWebKit') > -1, //蘋果、谷歌內核
mobile: !!u.match(/AppleWebKit.*Mobile.*/), //是否為移動終端
ios: !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/), //ios終端
android: u.indexOf('Android') > -1 || u.indexOf('Adr') > -1, //android終端
iPhone: u.indexOf('iPhone') > -1, //是否為iPhone或者QQHD瀏覽器
iPad: u.indexOf('iPad') > -1, //是否iPad
webApp: u.indexOf('Safari') == -1, //是否web應該程序，沒有頭部與底部
weixin: u.indexOf('MicroMessenger') > -1, //是否微信 （2015-01-22新增）
};
};
判斷是否為數組
// 判斷是否為數組
/*
*funname:isArray
*des:判斷是否為數組
*params: [array] arr
*return: [bolean]
*/
function isArray(arr) {
if (arr typeof arr === 'object' && arr.constructor == Array) {
return true;
}
return false;
}
數組除重
// 數組除重
/*
*funname:arrayUnique
*des:數組去重
*params: [array] arr
*return: [array]
*/
var arrayUnique = function(arr) {
var newArr = [];
var temp = {};
var len = arr.length;
for (var index = 0; index < len; index++) {
var key = typeof(arr[index]) + arr[index];
if (temp[key] !== 1) {
newArr.push(arr[index]);
temp[key] = 1;
}
}
return newArr;
};
獲取cookie
/*
*funname:getCookie
*des:獲取cookie
*params: [array] arr
*return: [array]
*/
function getCookie(c_name) {
if (document.cookie.length > 0) {
c_start = document.cookie.indexOf(c_name + "=")
if (c_start != -1) {
c_start = c_start + c_name.length + 1
c_end = document.cookie.indexOf(";", c_start)
if (c_end == -1) c_end = document.cookie.length
return unescape(document.cookie.substring(c_start, c_end))
}
}
return ""
}
設置cookie
/*
*funname:setCookie
*des:設置cookie
*params: [string] c_name,[string] value,expiredays
*return: [array]
*/
function setCookie(c_name, value, expiredays) {
var exdate = new Date()
exdate.setDate(exdate.getDate() + expiredays)
document.cookie = c_name + "=" + escape(value) +
((expiredays == null) ? "" : ";expires=" + exdate.toGMTString())
}
檢測cookie
/*
*funname:checkCookie
*des:檢測cookie
*params:
*return:
*/
function checkCookie() {
username = getCookie('username')
if (username != null && username != "") {
return true;
} else {
return false;
}
}獲取localstorage
/*
*funname:getLocalStorage
*des:獲取localstorage
*params: [string] key
*return: [string]
*/
function getLocalStorage(key) {
if (localStorage) {
return localStorage.getItem(key);
} else {
// 使用cookie獲取
return getCookie(key);
}
return '';
}設置localstorage
/*
*funname:setLocalStorage
*des:設置localstorage
*params:
*return: null
*/
function setLocalStorage(key, value, expiredays) {
if (localStorage) {
console.log(setLocalStorage);
localStorage.setItem(key, value);
} else {
// 使用cookie保存
setCookie(key, value, expiredays);
}
}清空localstorage
/*
*funname:clearLocalStorage
*des:清空localstorage
*params: [string] key
*return: [string]
*/
function clearLocalStorage(key) {
if (localStorage) {
localStorage.removeItem(key);
} else {
// 使用cookie獲取
clearCookie(key)
}
}解決ios滾動問題的插件
/**
* ScrollFix v0.1
* http://www.joelambert.co.uk
*
* Copyright 2011, Joe Lambert.
* Free to use under the MIT license.
* http://www.opensource.org/licenses/mit-license.php
* des: 解決ios滾動問題的插件
*/
var ScrollFix = function(elem) {
// Variables to track inputs
var startY, startTopScroll;
elem = elem || document.querySelector(elem);
// If there is no element, then do nothing
if (!elem)
return;
// Handle the start of interactions
elem.addEventListener('touchstart', function(event) {
startY = event.touches[0].pageY;
startTopScroll = elem.scrollTop;
if (startTopScroll <= 0)
elem.scrollTop = 1;
if (startTopScroll + elem.offsetHeight >= elem.scrollHeight)
elem.scrollTop = elem.scrollHeight - elem.offsetHeight - 1;
}, false);
};
動態加載js
/*
*funname:loadScript
*des:動態加載js
*params: [string] filepath,[function] onloadCallback
*return: null
*/
function loadScript(filepath, onloadCallback) {
var scriptDom = document.createElement("script");
scriptDom.onload = scriptDom.onreadystatechange = onloadCallback;
scriptDom.type = "text/javascript";
scriptDom.src = filepath;
document.body.appendChild(scriptDom);
}克隆對象
/*
*desc:針對純 JSON 數據對象的深拷貝
*params：[object] obj
*/
var cloneObj = function(obj) {
if (obj) {
var newObj = JSON.stringify(obj)
newObj = JSON.parse(newObj)
return newObj
}
return null
};
局限性：
- 無法復制函數
- 原型鏈沒了，對象就是object，所屬的類沒了。
移動端返回上一頁
/*
*desc:移動端返回上一頁
*params：
*/
var appGoBack = function() {
if (!url || url == '') {
window.history.go(-1);
setTimeout(function() {
// 如果不支持history.go，返回首頁
location.replace('/');
}, 300);
} else {
// ios的.history.go和history.back有bug
location.replace(url);
}
return false;
}獲取隨機數
/*
* funname:GetRandomNum
*params:[number]
* des:獲取隨機數
*return:
*/
var getRandom = function(Min, Max) {
var Range = Max - Min;
var Rand = Math.random();
return (Min + Math.round(Rand * Range));
};11位手機號碼驗證
function checkPhone(phone ){
if(/^1(3|4|5|7|8)\d{9}$/.test(phone)){
return true;
}
return false;
}判斷是否是漢字
function isChinese(str){
var reg = /[\u4E00-\u9FA5\uF900-\uFA2D]/;
return reg.test(str);
}
//u4e00-u9fbf: unicode CJK(中日韓)統一表意字符。u9fa5后至u9fbf為空
//uF900-uFAFF: unicode CJK 兼容象形文字 。uFA2D后至uFAFF為空不定期更新，看心情更新~
本文轉載於:猿2048js常用的函數庫