什么是内存泄露？
已经不再使用的内存未能被程序释放，叫内存泄露(memory leak)。
内存泄露会带来什么样的后果？
内存泄露会因为减少可用内存数量从而降低计算机性能，严重的可能导致设备停止正常工作，或者应用程序崩溃。
什么情况下出现内存泄漏？
首先了解一下垃圾回收[……]
分类：JavaScript
JS设备横屏给出提示界面
效果图：
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JS获取移动端系统信息(操作系统、操作系统版本、横竖屏状态、设备类型、网络状态、生成浏览器指纹)
GitHub: https://github.com/skillnull/Get-Device-Info
在线实例：http://skillnull.com/others/GetDeviceInfo/index.html
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var DeviceInfo = (function () { var root = typeof self !== 'undefined' ? self : this var _window = root || {} // 变量库 var VariableLibrary = { navigator: typeof root.navigator != 'undefined' ? root.navigator : {}, // 信息map infoMap: { engine: ['WebKit', 'Trident', 'Gecko', 'Presto'], browser: ['Safari', 'Chrome', 'Edge', 'IE', 'Firefox', 'Firefox Focus', 'Chromium', 'Opera', 'Vivaldi', 'Yandex', 'Arora', 'Lunascape', 'QupZilla', 'Coc Coc', 'Kindle', 'Iceweasel', 'Konqueror', 'Iceape', 'SeaMonkey', 'Epiphany', '360', '360SE', '360EE', 'UC', 'QQBrowser', 'QQ', 'Baidu', 'Maxthon', 'Sogou', 'LBBROWSER', '2345Explorer', 'TheWorld', 'XiaoMi', 'Quark', 'Qiyu', 'Wechat', 'Taobao', 'Alipay', 'Weibo', 'Douban', 'Suning', 'iQiYi'], os: ['Windows', 'Linux', 'Mac OS', 'Android', 'Ubuntu', 'FreeBSD', 'Debian', 'iOS', 'Windows Phone', 'BlackBerry', 'MeeGo', 'Symbian', 'Chrome OS', 'WebOS'], device: ['Mobile', 'Tablet', 'iPad'] } } // 方法库 var MethodLibrary = (function () { return { // 获取匹配库 getMatchMap: function (u) { return { // 内核 'Trident': u.indexOf('Trident') > -1 || u.indexOf('NET CLR') > -1, 'Presto': u.indexOf('Presto') > -1, 'WebKit': u.indexOf('AppleWebKit') > -1, 'Gecko': u.indexOf('Gecko/') > -1, // 浏览器 'Safari': u.indexOf('Safari') > -1, 'Chrome': u.indexOf('Chrome') > -1 || u.indexOf('CriOS') > -1, 'IE': u.indexOf('MSIE') > -1 || u.indexOf('Trident') > -1, 'Edge': u.indexOf('Edge') > -1, 'Firefox': u.indexOf('Firefox') > -1 || u.indexOf('FxiOS') > -1, 'Firefox Focus': u.indexOf('Focus') > -1, 'Chromium': u.indexOf('Chromium') > -1, 'Opera': u.indexOf('Opera') > -1 || u.indexOf('OPR') > -1, 'Vivaldi': u.indexOf('Vivaldi') > -1, 'Yandex': u.indexOf('YaBrowser') > -1, 'Arora': u.indexOf('Arora') > -1, 'Lunascape': u.indexOf('Lunascape') > -1, 'QupZilla': u.indexOf('QupZilla') > -1, 'Coc Coc': u.indexOf('coc_coc_browser') > -1, 'Kindle': u.indexOf('Kindle') > -1 || u.indexOf('Silk/') > -1, 'Iceweasel': u.indexOf('Iceweasel') > -1, 'Konqueror': u.indexOf('Konqueror') > -1, 'Iceape': u.indexOf('Iceape') > -1, 'SeaMonkey': u.indexOf('SeaMonkey') > -1, 'Epiphany': u.indexOf('Epiphany') > -1, '360': u.indexOf('QihooBrowser') > -1 || u.indexOf('QHBrowser') > -1, '360EE': u.indexOf('360EE') > -1, '360SE': u.indexOf('360SE') > -1, 'UC': u.indexOf('UC') > -1 || u.indexOf(' UBrowser') > -1, 'QQBrowser': u.indexOf('QQBrowser') > -1, 'QQ': u.indexOf('QQ/') > -1, 'Baidu': u.indexOf('Baidu') > -1 || u.indexOf('BIDUBrowser') > -1, 'Maxthon': u.indexOf('Maxthon') > -1, 'Sogou': u.indexOf('MetaSr') > -1 || u.indexOf('Sogou') > -1, 'LBBROWSER': u.indexOf('LBBROWSER') > -1, '2345Explorer': u.indexOf('2345Explorer') > -1, 'TheWorld': u.indexOf('TheWorld') > -1, 'XiaoMi': u.indexOf('MiuiBrowser') > -1, 'Quark': u.indexOf('Quark') > -1, 'Qiyu': u.indexOf('Qiyu') > -1, 'Wechat': u.indexOf('MicroMessenger') > -1, 'Taobao': u.indexOf('AliApp(TB') > -1, 'Alipay': u.indexOf('AliApp(AP') > -1, 'Weibo': u.indexOf('Weibo') > -1, 'Douban': u.indexOf('com.douban.frodo') > -1, 'Suning': u.indexOf('SNEBUY-APP') > -1, 'iQiYi': u.indexOf('IqiyiApp') > -1, // 系统或平台 'Windows': u.indexOf('Windows') > -1, 'Linux': u.indexOf('Linux') > -1 || u.indexOf('X11') > -1, 'Mac OS': u.indexOf('Macintosh') > -1, 'Android': u.indexOf('Android') > -1 || u.indexOf('Adr') > -1, 'Ubuntu': u.indexOf('Ubuntu') > -1, 'FreeBSD': u.indexOf('FreeBSD') > -1, 'Debian': u.indexOf('Debian') > -1, 'Windows Phone': u.indexOf('IEMobile') > -1 || u.indexOf('Windows Phone') > -1, 'BlackBerry': u.indexOf('BlackBerry') > -1 || u.indexOf('RIM') > -1, 'MeeGo': u.indexOf('MeeGo') > -1, 'Symbian': u.indexOf('Symbian') > -1, 'iOS': u.indexOf('like Mac OS X') > -1, 'Chrome OS': u.indexOf('CrOS') > -1, 'WebOS': u.indexOf('hpwOS') > -1, // 设备 'Mobile': u.indexOf('Mobi') > -1 || u.indexOf('iPh') > -1 || u.indexOf('480') > -1, 'Tablet': u.indexOf('Tablet') > -1 || u.indexOf('Nexus 7') > -1, 'iPad': u.indexOf('iPad') > -1 } }, // 在信息map和匹配库中进行匹配 matchInfoMap: function (_this) { var u = VariableLibrary.navigator.userAgent || {} var match = MethodLibrary.getMatchMap(u) for (var s in VariableLibrary.infoMap) { for (var i = 0; i < VariableLibrary.infoMap[s].length; i++) { var value = VariableLibrary.infoMap[s][i] if (match[value]) { _this[s] = value } } } }, // 获取当前操作系统 getOS: function () { var _this = this MethodLibrary.matchInfoMap(_this) return _this.os }, // 获取操作系统版本 getOSVersion: function () { var _this = this var u = VariableLibrary.navigator.userAgent || {} _this.osVersion = '' // 系统版本信息 var osVersion = { 'Windows': function () { var v = u.replace(/^.*Windows NT ([\d.]+);.*$/, '$1') var oldWindowsVersionMap = { '6.4': '10', '6.3': '8.1', '6.2': '8', '6.1': '7', '6.0': 'Vista', '5.2': 'XP', '5.1': 'XP', '5.0': '2000' } return oldWindowsVersionMap[v] || v }, 'Android': function () { return u.replace(/^.*Android ([\d.]+);.*$/, '$1') }, 'iOS': function () { return u.replace(/^.*OS ([\d_]+) like.*$/, '$1').replace(/_/g, '.') }, 'Debian': function () { return u.replace(/^.*Debian\/([\d.]+).*$/, '$1') }, 'Windows Phone': function () { return u.replace(/^.*Windows Phone( OS)? ([\d.]+);.*$/, '$2') }, 'Mac OS': function () { return u.replace(/^.*Mac OS X ([\d_]+).*$/, '$1').replace(/_/g, '.') }, 'WebOS': function () { return u.replace(/^.*hpwOS\/([\d.]+);.*$/, '$1') } } if (osVersion[_this.os]) { _this.osVersion = osVersion[_this.os]() if (_this.osVersion == u) { _this.osVersion = '' } } return _this.osVersion }, // 获取横竖屏状态 getOrientationStatu: function () { var orientationStatus = '' var orientation = window.matchMedia("(orientation: portrait)") if (orientation.matches) { orientationStatus = "竖屏" } else { orientationStatus = "横屏" } return orientationStatus }, // 获取设备类型 getDeviceType: function () { var _this = this _this.device = 'PC' MethodLibrary.matchInfoMap(_this) return _this.device }, // 获取网络状态 getNetwork: function () { var netWork = navigator && navigator.connection && navigator.connection.effectiveType return netWork }, // 获取当前语言 getLanguage: function () { var _this = this _this.language = (function () { var language = (VariableLibrary.navigator.browserLanguage || VariableLibrary.navigator.language) var arr = language.split('-') if (arr[1]) { arr[1] = arr[1].toUpperCase() } return arr.join('_') })() return _this.language }, // 生成浏览器指纹 createFingerprint: function (domain) { var fingerprint function bin2hex (s) { var i, l, n, o = '' s += '' for (i = 0, l = s.length; i < l; i++) { n = s.charCodeAt(i) .toString(16) o += n.length < 2 ? '0' + n : n } return o } var canvas = document.createElement('canvas') var ctx = canvas.getContext('2d') var txt = domain || window.location.host ctx.textBaseline = "top" ctx.font = "14px 'Arial'" ctx.textBaseline = "tencent" ctx.fillStyle = "#f60" ctx.fillRect(125, 1, 62, 20) ctx.fillStyle = "#069" ctx.fillText(txt, 2, 15) ctx.fillStyle = "rgba(102, 204, 0, 0.7)" ctx.fillText(txt, 4, 17) var b64 = canvas.toDataURL().replace("data:image/png;base64,", "") var bin = atob(b64) var crc = bin2hex(bin.slice(-16, -12)) fingerprint = crc return fingerprint }, // 浏览器信息 getBrowserInfo: function () { var _this = this MethodLibrary.matchInfoMap(_this) var u = VariableLibrary.navigator.userAgent || {} var _mime = function (option, value) { var mimeTypes = VariableLibrary.navigator.mimeTypes for (var key in mimeTypes) { if (mimeTypes[key][option] == value) { return true } } return false } var match = MethodLibrary.getMatchMap(u) var is360 = false if (_window.chrome) { var chrome_vision = u.replace(/^.*Chrome\/([\d]+).*$/, '$1') if (chrome_vision > 36 && _window.showModalDialog) { is360 = true } else if (chrome_vision > 45) { is360 = _mime("type", "application/vnd.chromium.remoting-viewer") } } if (match['Baidu'] && match['Opera']) { match['Baidu'] = false } if (match['Mobile']) { match['Mobile'] = !(u.indexOf('iPad') > -1) } if (is360) { if (_mime("type", "application/gameplugin")) { match['360SE'] = true } else if (VariableLibrary.navigator && typeof VariableLibrary.navigator['connection']['saveData'] == 'undefined') { match['360SE'] = true } else { match['360EE'] = true } } if (match['IE'] || match['Edge']) { var navigator_top = window.screenTop - window.screenY switch (navigator_top) { case 71: // 无收藏栏,贴边 break case 74: // 无收藏栏,非贴边 break case 99: // 有收藏栏,贴边 break case 102: // 有收藏栏,非贴边 match['360EE'] = true break; case 75: // 无收藏栏,贴边 break case 74: // 无收藏栏,非贴边 break case 105: // 有收藏栏,贴边 break case 104: // 有收藏栏,非贴边 match['360SE'] = true break default: break } } var browerVersionMap = { 'Safari': function () { return u.replace(/^.*Version\/([\d.]+).*$/, '$1') }, 'Chrome': function () { return u.replace(/^.*Chrome\/([\d.]+).*$/, '$1').replace(/^.*CriOS\/([\d.]+).*$/, '$1') }, 'IE': function () { return u.replace(/^.*MSIE ([\d.]+).*$/, '$1').replace(/^.*rv:([\d.]+).*$/, '$1') }, 'Edge': function () { return u.replace(/^.*Edge\/([\d.]+).*$/, '$1') }, 'Firefox': function () { return u.replace(/^.*Firefox\/([\d.]+).*$/, '$1').replace(/^.*FxiOS\/([\d.]+).*$/, '$1') }, 'Firefox Focus': function () { return u.replace(/^.*Focus\/([\d.]+).*$/, '$1') }, 'Chromium': function () { return u.replace(/^.*Chromium\/([\d.]+).*$/, '$1') }, 'Opera': function () { return u.replace(/^.*Opera\/([\d.]+).*$/, '$1').replace(/^.*OPR\/([\d.]+).*$/, '$1') }, 'Vivaldi': function () { return u.replace(/^.*Vivaldi\/([\d.]+).*$/, '$1') }, 'Yandex': function () { return u.replace(/^.*YaBrowser\/([\d.]+).*$/, '$1') }, 'Arora': function () { return u.replace(/^.*Arora\/([\d.]+).*$/, '$1') }, 'Lunascape': function () { return u.replace(/^.*Lunascape[\/\s]([\d.]+).*$/, '$1') }, 'QupZilla': function () { return u.replace(/^.*QupZilla[\/\s]([\d.]+).*$/, '$1') }, 'Coc Coc': function () { return u.replace(/^.*coc_coc_browser\/([\d.]+).*$/, '$1') }, 'Kindle': function () { return u.replace(/^.*Version\/([\d.]+).*$/, '$1') }, 'Iceweasel': function () { return u.replace(/^.*Iceweasel\/([\d.]+).*$/, '$1') }, 'Konqueror': function () { return u.replace(/^.*Konqueror\/([\d.]+).*$/, '$1') }, 'Iceape': function () { return u.replace(/^.*Iceape\/([\d.]+).*$/, '$1') }, 'SeaMonkey': function () { return u.replace(/^.*SeaMonkey\/([\d.]+).*$/, '$1') }, 'Epiphany': function () { return u.replace(/^.*Epiphany\/([\d.]+).*$/, '$1') }, '360': function () { return u.replace(/^.*QihooBrowser\/([\d.]+).*$/, '$1') }, '360SE': function () { var hash = {'63': '10.0', '55': '9.1', '45': '8.1', '42': '8.0', '31': '7.0', '21': '6.3'} var chrome_vision = u.replace(/^.*Chrome\/([\d]+).*$/, '$1') return hash[chrome_vision] || '' }, '360EE': function () { var hash = {'69': '11.0', '63': '9.5', '55': '9.0', '50': '8.7', '30': '7.5'}; var chrome_vision = u.replace(/^.*Chrome\/([\d]+).*$/, '$1') return hash[chrome_vision] || '' }, 'Maxthon': function () { return u.replace(/^.*Maxthon\/([\d.]+).*$/, '$1') }, 'QQBrowser': function () { return u.replace(/^.*QQBrowser\/([\d.]+).*$/, '$1') }, 'QQ': function () { return u.replace(/^.*QQ\/([\d.]+).*$/, '$1') }, 'Baidu': function () { return u.replace(/^.*BIDUBrowser[\s\/]([\d.]+).*$/, '$1') }, 'UC': function () { return u.replace(/^.*UC?Browser\/([\d.]+).*$/, '$1') }, 'Sogou': function () { return u.replace(/^.*SE ([\d.X]+).*$/, '$1').replace(/^.*SogouMobileBrowser\/([\d.]+).*$/, '$1') }, 'LBBROWSER': function () { var hash = {'57': '6.5', '49': '6.0', '46': '5.9', '42': '5.3', '39': '5.2', '34': '5.0', '29': '4.5', '21': '4.0'}; var chrome_vision = navigator.userAgent.replace(/^.*Chrome\/([\d]+).*$/, '$1'); return hash[chrome_vision] || ''; }, '2345Explorer': function () { return u.replace(/^.*2345Explorer\/([\d.]+).*$/, '$1') }, 'TheWorld': function () { return u.replace(/^.*TheWorld ([\d.]+).*$/, '$1') }, 'XiaoMi': function () { return u.replace(/^.*MiuiBrowser\/([\d.]+).*$/, '$1') }, 'Quark': function () { return u.replace(/^.*Quark\/([\d.]+).*$/, '$1') }, 'Qiyu': function () { return u.replace(/^.*Qiyu\/([\d.]+).*$/, '$1') }, 'Wechat': function () { return u.replace(/^.*MicroMessenger\/([\d.]+).*$/, '$1') }, 'Taobao': function () { return u.replace(/^.*AliApp\(TB\/([\d.]+).*$/, '$1') }, 'Alipay': function () { return u.replace(/^.*AliApp\(AP\/([\d.]+).*$/, '$1') }, 'Weibo': function () { return u.replace(/^.*weibo__([\d.]+).*$/, '$1') }, 'Douban': function () { return u.replace(/^.*com.douban.frodo\/([\d.]+).*$/, '$1') }, 'Suning': function () { return u.replace(/^.*SNEBUY-APP([\d.]+).*$/, '$1') }, 'iQiYi': function () { return u.replace(/^.*IqiyiVersion\/([\d.]+).*$/, '$1') } } _this.browserVersion = '' if (browerVersionMap[_this.browser]) { _this.browserVersion = browerVersionMap[_this.browser]() if (_this.browserVersion == u) { _this.browserVersion = '' } } if (_this.browser == 'Edge') { _this.engine = 'EdgeHTML' } if (_this.browser == 'Chrome' && parseInt(_this.browserVersion) > 27) { _this.engine = 'Blink' } if (_this.browser == 'Opera' && parseInt(_this.browserVersion) > 12) { _this.engine = 'Blink' } if (_this.browser == 'Yandex') { _this.engine = 'Blink' } return _this.browser + '（版本: ' + _this.browserVersion + ' 内核: ' + _this.engine + '）' } } })() // 逻辑层 var LogicLibrary = (function () { return { DeviceInfoObj: function (params) { var info = { deviceType: MethodLibrary.getDeviceType(), // 设备类型 OS: MethodLibrary.getOS(), // 操作系统 OSVersion: MethodLibrary.getOSVersion(), // 操作系统版本 screenHeight: _window.screen.height, // 屏幕高 screenWidth: _window.screen.width, // 屏幕宽 language: MethodLibrary.getLanguage(), // 当前使用的语言-国家 netWork: MethodLibrary.getNetwork(), // 联网类型 orientation: MethodLibrary.getOrientationStatu(), // 横竖屏 browserInfo: MethodLibrary.getBrowserInfo(), // 浏览器信息 fingerprint: MethodLibrary.createFingerprint(params.domain), // 浏览器指纹 userAgent: VariableLibrary.navigator.userAgent // 包含 appCodeName,appName,appVersion,language,platform 等 } if (!params.info || params.info.length == 0) { return info } else { var infoTemp = {} for (var i in info) { params.info.forEach(function (item) { if (item.toLowerCase() == i.toLowerCase()) { item = i infoTemp[item] = info[item] } }) } return infoTemp } } } })() // 对外暴露方法 return { getDeviceInfo: function (params) { return LogicLibrary.DeviceInfoObj(params) } } })() |
&[……]
JS判断图片是否加载完毕
JS深度合并对象
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/** * 如果target(也就是FirstOBJ[key])存在， * 且是对象的话再去调用deepObjectMerge， * 否则就是FirstOBJ[key]里面没这个对象，需要与SecondOBJ[key]合并 */ function deepObjectMerge(FirstOBJ, SecondOBJ) { // 深度合并对象 for (var key in SecondOBJ) { FirstOBJ[key] = FirstOBJ[key] && FirstOBJ[key].toString() === "[object Object]" ? deepObjectMerge(FirstOBJ[key], SecondOBJ[key]) : FirstOBJ[key] = SecondOBJ[key]; } return FirstOBJ; } |
JS判断当前DOM树是否加载完毕
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/** * @function Monitor whether the document tree is loaded. * @param fn */ function domReady(fn) { if (document.addEventListener) { // 标准浏览器 document.addEventListener('DOMContentLoaded', function () { //注销时间，避免重复触发 document.removeEventListener('DOMContentLoaded', arguments.callee, false); fn(); // 运行函数 }, false); } else if (document.attachEvent) { // IE浏览器 document.attachEvent('onreadystatechange', function () { if (document.readyState == 'complete') { document.detachEvent('onreadystatechange', arguments.callee); fn(); // 函数运行 } }); } } domReady(loadStart); |
被引用的外部JS存在window.onload时，判断当前页面是否已存在window.onload，并进行相应处理
JS Cookie相关操作
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function setCookie(cookieName, cookieValue, expires) { // 设置Cookie function getCookieName(cookieName) { //获取并返回与 cookieName 同名的 cookie 名称，允许大小写不同,如果不存在这样的 cookie，就返回 cookieName var lowerCookieName = cookieName.toLowerCase(); //转换为小写 var cookieStr = document.cookie; // 获取当前cookie if (cookieStr == "") { return cookieName; } var cookieArr = cookieStr.split(";"); var pos = -1; for (var i = 0; i < cookieStr.length; i++) { pos = cookieArr[i].indexOf("="); if (pos > 0) { if (cookieArr[i].substring(0, pos).toLowerCase() == lowerCookieName) { return cookieArr[i].substring(0, pos); } } } return cookieName; } function writeCookie(cookieName, cookieValue, expires) { // 写cookie,不区分大小写 if (expires) { document.cookie = getCookieName(cookieName) + "=" + escape(cookieValue) + "; expires=" + expires.toGMTString(); } else { document.cookie = getCookieName(cookieName) + "=" + escape(cookieValue); } } function readCookie(cookieName, defaultValue) { //获取并返回 cookie 值,不区分大小写 var lowerCookieName = cookieName.toLowerCase(); var cookieStr = document.cookie; if (cookieStr == "") { return defaultValue; } var cookieArr = cookieStr.split("; "); var pos = -1; for (var i = 0; i < cookieArr.length; i++) { pos = cookieArr[i].indexOf("="); if (pos > 0) { if (cookieArr[i].substring(0, pos).toLowerCase() == lowerCookieName) { return unescape(cookieArr[i].substring(pos + 1, cookieArr[i].length)); } } } return defaultValue; } writeCookie(cookieName, cookieValue, expires); } |
原生ajax方法封装
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/** * @function ajax request * @fields ajaxName:请求名称，method：请求方法，headers:setRequestHeader自定义部分,url：接口地址，async：是否异步请求，withCredentials：是否支持跨域发送cookie，dataType:数据类型 ,data：post请求参数 * @param data:{ajaxName:"ajaxNameString",headers:{},method:"GET/POST",url:"",async:true/false,withCredentials:true/false,dataType:"json",data:""} * @result ajaxName.responseText */ function ajaxRequest (data, callback) { data = data || {} data.dataType = data.dataType || 'json' var sendParams = null var headers = data.headers || {} var ajax = data.ajaxName // 新建请求 if (window.XMLHttpRequest) { ajax = new XMLHttpRequest() } else { ajax = new ActiveXObject('Microsoft.XMLHTTP') } // 打开请求 ajax.open(data.method.toUpperCase(), data.url, data.async) // 是否支持跨域发送cookie ajax.withCredentials = data.withCredentials ajax.setRequestHeader("Content-type", data.contentType || "application/x-www-form-urlencoded") // POST请求设置 if (data.method == 'POST') { for (var i in headers) { ajax.setRequestHeader(i, headers[i]) } if (data.data) { sendParams = data.data } } // 发送请求 ajax.send(sendParams ? sendParams : null) // 注册事件 ajax.onreadystatechange = function () { if (window.location.origin + '/login/index' === ajax.responseURL) { window.location.reload() window.location.href = window.location.origin + '/login/index' return } callback(ajax) } } /** * GET * @param ajaxName 请求名称 * @param requestUrl 请求接口地址 * @param async 是否异步请求 * @param callBack 回调函数 * @param contentType 请求类型 */ function ajaxGetData (ajaxName, requestUrl, async, callBack, contentType) { ajaxRequest({ ajaxName: ajaxName, contentType: contentType || "application/json;charset=utf-8", method: "GET", url: requestUrl, async: async, cache: false, withCredentials: true, dataType: "json" }, function callback (ajax) { if (ajax.status == 200 && ajax.readyState == 4) { callBack(ajax.responseText) } }) } /** * 拼接GET请求url参数 * @param url * @param params * @returns {string} */ function formateGetUrl (url, params) { var resultParams = '' for (var key in params) { resultParams = resultParams + '&' + key + '=' + params[key] } return url + '?' + resultParams.substr(1) } /** * POST * @param ajaxName 请求名称 * @param requestUrl 请求接口地址 * @param async 是否异步请求 * @param callBack 回调函数 * @param contentType 请求类型 */ function ajaxPostData (ajaxName, requestUrl, params, async, callBack, contentType) { var resultParams = '' if (!contentType || contentType === "application/x-www-form-urlencoded;charset=utf-8") { for (var key in params) { resultParams = resultParams + '&' + key + '=' + encodeURIComponent(params[key]) } } else { resultParams = params && JSON.stringify(params) } ajaxRequest({ ajaxName: ajaxName, headers: {}, contentType: contentType || "application/x-www-form-urlencoded;charset=utf-8", method: "POST", dataType: "json", url: requestUrl, processData: true, async: async, data: resultParams }, function callback (ajax) { if (ajax.status == 200 && ajax.readyState == 4) { callBack(ajax.responseText) } }) } |
JS格式化时间(支持小程序，兼容IOS)
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const REGEX = /(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2})/ /** * @function format time * @param val, format * @return {string} * @example * <template> * <div> * <span>{{item.time | formatTime('yyyy/MM/dd hh:mm:ss')}}</span> * </div> * </template> * import {formatTime} from '../../library/timeFormat' * export default { * filters: {formatTime} * } */ export const formatTime = (val, format) => { if (val) { /** * @instructions 如果不是时间戳格式，且含有字符 '-' 则将 '-' 替换成 '/' && 删除小数点及后面的数字 * @reason 将 '-' 替换成 '/' && 删除小数点及后面的数字 的原因是safari浏览器仅支持 '/' 隔开的时间格式 */ if (val.toString().indexOf('-') > 0) { val = val.replace(/T/g, ' ').replace(/\.[\d]{3}Z/, '').replace(/(-)/g, '/') // 将 '-' 替换成 '/' val = val.slice(0, val.indexOf('.')) // 删除小数点及后面的数字 } let date = new Date(val) date.setHours(date.getHours() + 8) const [whole, yy, MM, dd, hh, mm, ss] = date.toISOString().match(REGEX) const year = new Date().getFullYear() const month = new Date().getMonth() + 1 const dates = new Date().getDate() if (format) { return format .replace('yyyy', yy) .replace('yy', yy.slice(2)) .replace('MM', MM) .replace('dd', dd) .replace('hh', hh) .replace('mm', mm) .replace('ss', ss) } else { return [yy, MM, dd].join('-') + ' ' + [hh, mm, ss].join(':') } } else { return '--' } } |