本篇目录：
- 1.截取指定字节数的字符串
- 2.判断是否微信
- 3.获取时间格式的几个举例
- 4.获取字符串字节长度
- 5.对象克隆、深拷贝
- 6.组织结构代码证验证
- 7.身份证号验证
- 8.js正则为url添加http标识
- 9.URL有效性校验方法
- 10.自定义jsonp方法
- 11.cookie操作
- 12.生成随机字符串 (可指定长度)
- 13.浏览器判断
- 14.Rem移动端适配
- 15.获取url后参数
- 16.动态加载JS
- 17.生成随机颜色值
上述方法都是日常工作中使用所得，所以会不定时更新，大家也可以留下你觉得好的方法:)
1.截取指定字节数的字符串
/** * 截取指定字节的字符串 * @param str 要截取的字符穿 * @param len 要截取的长度，根据字节计算 * @param suffix 截取前len个后，其余的字符的替换字符，一般用“…” * @returns {*} */function cutString(str, len, suffix) { ?if (!str) return ""; ?if (len <= 0) return ""; ?if (!suffix) suffix = ""; ?var templen = 0; ?for (var i = 0; i < str.length; i++) { ???if (str.charCodeAt(i) > 255) { ?????templen += 2; ???} else { ?????templen++ ???} ???if (templen == len) { ?????return str.substring(0, i + 1) + suffix; ???} else if (templen > len) { ?????return str.substring(0, i) + suffix; ???} ?} ?return str;}复制代码2.判断是否微信
/** * 判断微信浏览器 * @returns {Boolean} */function isWeiXin() { ?var ua = window.navigator.userAgent.toLowerCase(); ?if (ua.match(/MicroMessenger/i) == ‘micromessenger‘) { ???return true; ?} else { ???return false; ?}}复制代码3.获取时间格式的几个举例
function getTimeFormat(time) { ?var date = new Date(parseInt(time) * 1000); ?var month, day, hour, min; ?parseInt(date.getMonth()) + 1 < 10 ? month = ‘0‘ + (parseInt(date.getMonth()) + 1) : month = parseInt(date.getMonth()) + 1; ?date.getDate() < 10 ? day = ‘0‘ + date.getDate() : day = date.getDate(); ?date.getHours() < 10 ? hour = ‘0‘ + date.getHours() : hour = date.getHours(); ?date.getMinutes() < 10 ? min = ‘0‘ + date.getMinutes() : min = date.getMinutes(); ?return [month, day].join(‘-‘) + ‘ ?‘ + hour + ‘:‘ + min}function getTimeFormatYMD(time) { ?var date = new Date(parseInt(time) * 1000); ?var year, month, day; ?year = date.getFullYear(); ?parseInt(date.getMonth()) + 1 < 10 ? month = ‘0‘ + (parseInt(date.getMonth()) + 1) : month = parseInt(date.getMonth()) + 1; ?date.getDate() < 10 ? day = ‘0‘ + date.getDate() : day = date.getDate(); ?return [year, month, day].join(‘-‘)}function getTimeFormatAll(time) { ?var date = new Date(parseInt(time) * 1000); ?var year, month, day, hour, min, second; ?year = date.getFullYear(); ?parseInt(date.getMonth()) + 1 < 10 ? month = ‘0‘ + (parseInt(date.getMonth()) + 1) : month = parseInt(date.getMonth()) + 1; ?date.getDate() < 10 ? day = ‘0‘ + date.getDate() : day = date.getDate(); ?date.getHours() < 10 ? hour = ‘0‘ + date.getHours() : hour = date.getHours(); ?date.getMinutes() < 10 ? min = ‘0‘ + date.getMinutes() : min = date.getMinutes(); ?date.getSeconds() < 10 ? second = ‘0‘ + date.getSeconds() : second = date.getSeconds(); ?return [year, month, day].join(‘-‘) + ‘ ?‘ + hour + ‘:‘ + min + ‘:‘ + second}复制代码4.获取字符串字节长度
/** * 获取字符串字节长度 * @param {String} * @returns {Boolean} */function checkLength(v) { ?var realLength = 0; ?var len = v.length; ?for (var i = 0; i < len; i++) { ???var charCode = v.charCodeAt(i); ???if (charCode >= 0 && charCode <= 128) realLength += 1; ???else realLength += 2; ?} ?return realLength;}复制代码5.对象克隆、深拷贝
/** * 对象克隆&深拷贝 * @param obj * @returns {{}} */function cloneObj(obj) { ?var newO = {}; ?if (obj instanceof Array) { ???newO = []; ?} ?for (var key in obj) { ???var val = obj[key]; ???newO[key] = typeof val === ‘object‘ ? arguments.callee(val) : val; ?} ?return newO;};复制代码克隆拷贝增强版
/** * 对象克隆&深拷贝 * @param obj * @returns {{}} */function clone(obj) { ?// Handle the 3 simple types, and null or undefined ?if (null == obj || "object" != typeof obj) return obj; ?// Handle Date ?if (obj instanceof Date) { ???var copy = new Date(); ???copy.setTime(obj.getTime()); ???return copy; ?} ?// Handle Array ?if (obj instanceof Array) { ???var copy = []; ???for (var i = 0, ???len = obj.length; i < len; ++i) { ?????copy[i] = clone(obj[i]); ???} ???return copy; ?} ?// Handle Object ?if (obj instanceof Object) { ???var copy = {}; ???for (var attr in obj) { ?????if (obj.hasOwnProperty(attr)) copy[attr] = clone(obj[attr]); ???} ???return copy; ?} ?throw new Error("Unable to copy obj! Its type isn‘t supported.");}复制代码测试用例：
var origin = { ?a: "text", ?b: null, ?c: undefined, ?e: { ???f: [1, 2] ?}}复制代码6.组织结构代码证验证
验证规则：
组织机构代码是每一个机关、社会团体、企事业单位在全国范围内唯一的、始终不变的法定代码标识。最新使用的组织机构代码在1997年颁布实施，由8位数字（或大写拉丁字母）本体代码和1位数字（或大写拉丁字母）校验码组成。本体代码采用系列（即分区段）顺序编码方法。校验码按下列公式计算：8 C9 = 11 - MOD(∑Ci * Wi，11)… (2) i = 1其中：MOD——表示求余函数；i——表示代码字符从左到右位置序号；Ci——表示第i位置上的代码字符的值，采用附录A“代码字符集”所列字符；C9——表示校验码；Wi——表示第i位置上的加权因子，其数值如下表：i 1 2 3 4 5 6 7 8 Wi 3 7 9 10 5 8 4 2当MOD函数值为1（即C9 = 10）时，校验码用字母X表示。
验证方法：
checkOrgCodeValid: function(el) { ?var txtval = el.value; ?var values = txtval.split("-"); ?var ws = [3, 7, 9, 10, 5, 8, 4, 2]; ?var str = ‘0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ‘; ?var reg = /^([0-9A-Z]){8}$/; ?if (!reg.test(values[0])) { ???return false ?} ?var sum = 0; ?for (var i = 0; i < 8; i++) { ???sum += str.indexOf(values[0].charAt(i)) * ws[i]; ?} ?var C9 = 11 - (sum % 11); ?var YC9 = values[1] + ‘‘; ?if (C9 == 11) { ???C9 = ‘0‘; ?} else if (C9 == 10) { ???C9 = ‘X‘; ?} else { ???C9 = C9 + ‘‘; ?} ?return YC9 == C9;}复制代码7.身份证号验证
/** * 验证身份证号 * @param el 号码输入input * @returns {boolean} */function checkCardNo(el) { ?var txtval = el.value; ?var reg = /(^\d{15}$)|(^\d{18}$)|(^\d{17}(\d|X|x)$)/; ?return reg.test(txtval)}复制代码8.js正则为url添加http标识
<!DOCTYPE html><html><head> ?<meta charset="utf-8"> ?<meta name="renderer" content="webkit"> ?<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> ???<title></title> ?<script> ???????var html = ‘http:/ / www.google.com ‘; ???????html += ‘\rwww.google.com ‘; ???????html += ‘\rcode.google.com ‘; ???????html += ‘\rhttp: //code.google.com/hosting/search?q=label%3aPython‘; ???????var regex = /(https?:\/\/)?(\w+\.?)+(\/[a-zA-Z0-9\?%=_\-\+\/]+)?/gi; ???????alert(‘before replace:‘); ???????alert(html); ???????html = html.replace(regex, ???????????function(match, capture) { ???????????????if (capture) { ???????????????????return match ???????????????} else { ???????????????????return ‘http://‘ + match; ???????????????} ???????????}); ???????alert(‘after replace:‘); ???????alert(html); ????</script></head><body> ?</body></html>复制代码9.URL有效性校验方法
/** * URL有效性校验 * @param str_url * @returns {boolean} */function isURL(str_url) { ??// 验证url ?var strRegex = "^((https|http|ftp|rtsp|mms)?://)" + "?(([0-9a-z_!~*‘().&=+$%-]+: )?[0-9a-z_!~*‘().&=+$%-]+@)?" // ????????????ftp的user@ + "(([0-9]{1,3}\.){3}[0-9]{1,3}" // IP形式的URL- 199.194.52.184 ?+ "|" // 允许IP和DOMAIN（域名） ?+ "([0-9a-z_!~*‘()-]+\.)*" // 域名- www. ?+ "([0-9a-z][0-9a-z-]{0,61})?[0-9a-z]\." // 二级域名 ?+ "[a-z]{2,6})" // first level domain- .com or .museum ?+ "(:[0-9]{1,4})?" // 端口- :80 ?+ "((/?)|" // a slash isn‘t required if there is no file name ?+ "(/[0-9a-z_!~*‘().;?:@&=+$,%#-]+)+/?)$"; ?var re = new RegExp(strRegex); ?return re.test(str_url);}// 建议的正则functionisURL(str) { ?return !! str.match(/(((^https?:(?:\/\/)?)(?:[-;:&=\+\$,\w]+@)?[A-Za-z0-9.-]+|(?:www.|[-;:&=\+\$,\w]+@)[A-Za-z0-9.-]+)((?:\/[\+~%\/.\w-_]*)?\??(?:[-\+=&;%@.\w_]*)#?(?:[\w]*))?)$/g);}复制代码10.自定义jsonp方法
/** * 自定义封装jsonp方法 * @param options */jsonp = function(options) { ?options = options || {}; ?if (!options.url || !options.callback) { ???throw new Error("参数不合法"); ?} ?//创建 script 标签并加入到页面中 ?var callbackName = (‘jsonp_‘ + Math.random()).replace(".", ""); ?var oHead = document.getElementsByTagName(‘head‘)[0]; ?options.data[options.callback] = callbackName; ?var params = formatParams(options.data); ?var oS = document.createElement(‘script‘); ?oHead.appendChild(oS); ?//创建jsonp回调函数 ?window[callbackName] = function(json) { ???oHead.removeChild(oS); ???clearTimeout(oS.timer); ???window[callbackName] = null; ???options.success && options.success(json); ?}; ?//发送请求 ?oS.src = options.url + ‘?‘ + params; ?//超时处理 ?if (options.time) { ???oS.timer = setTimeout(function() { ?????window[callbackName] = null; ?????oHead.removeChild(oS); ?????options.fail && options.fail({ ???????message: "超时" ?????}); ???}, ???time); ?}};/** * 格式化参数 * @param data * @returns {string} */formatParams = function(data) { ?var arr = []; ?for (var name in data) { ???arr.push(encodeURIComponent(name) + ‘=‘ + encodeURIComponent(data[name])); ?} ?return arr.join(‘&‘);}复制代码11.cookie操作
//写cookiessetCookie = function(name, value, time) { ?var strsec = getsec(time); ?var exp = new Date(); ?exp.setTime(exp.getTime() + strsec * 1); ?document.cookie = name + "=" + escape(value) + ";expires=" + exp.toGMTString();}//cookie操作辅助函数getsec = function(str) { ?var str1 = str.substring(1, str.length) * 1; ?var str2 = str.substring(0, 1); ?if (str2 == "s") { ???return str1 * 1000; ?} else if (str2 == "h") { ???return str1 * 60 * 60 * 1000; ?} else if (str2 == "d") { ???return str1 * 24 * 60 * 60 * 1000; ?}}//读取cookiesgetCookie = function(name) { ?var arr, reg = new RegExp("(^| )" + name + "=([^;]*)(;|$)"); ?if (arr = document.cookie.match(reg)) return (arr[2]); ?else return null;}//删除cookiesdelCookie = function(name) { ?var exp = new Date(); ?exp.setTime(exp.getTime() - 1); ?var cval = getCookie(name); ?if (cval != null) document.cookie = name + "=" + cval + ";expires=" + exp.toGMTString();}复制代码12.生成随机字符串 (可指定长度)
/** * 生成随机字符串(可指定长度) * @param len * @returns {string} */randomString = function(len) { ?len = len || 8; ?var $chars = ‘ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz2345678‘; ?/****默认去掉了容易混淆的字符oOLl,9gq,Vv,Uu,I1****/ ?var maxPos = $chars.length; ?var pwd = ‘‘; ?for (var i = 0; i < len; i++) { ???pwd += $chars.charAt(Math.floor(Math.random() * maxPos)); ?} ?return pwd;}复制代码13.浏览器判断
function parseUA() { ?var u = navigator.userAgent; ?var u2 = navigator.userAgent.toLowerCase(); ?return { //移动终端浏览器版本信息 ???trident: u.indexOf(‘Trident‘) > -1, ???//IE内核 ???presto: u.indexOf(‘Presto‘) > -1, ???//opera内核 ???webKit: u.indexOf(‘AppleWebKit‘) > -1, ???//苹果、谷歌内核 ???gecko: u.indexOf(‘Gecko‘) > -1 && u.indexOf(‘KHTML‘) == -1, ???//火狐内核 ???mobile: !!u.match(/AppleWebKit.*Mobile.*/), ???//是否为移动终端 ???ios: !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/), ???//ios终端 ???android: u.indexOf(‘Android‘) > -1 || u.indexOf(‘Linux‘) > -1, ???//android终端或uc浏览器 ???iPhone: u.indexOf(‘iPhone‘) > -1, ???//是否为iPhone或者QQHD浏览器 ???iPad: u.indexOf(‘iPad‘) > -1, ???//是否iPad ???webApp: u.indexOf(‘Safari‘) == -1, ???//是否web应该程序，没有头部与底部 ???iosv: u.substr(u.indexOf(‘iPhone OS‘) + 9, 3), ???weixin: u2.match(/MicroMessenger/i) == "micromessenger", ???ali: u.indexOf(‘AliApp‘) > -1, ?};}var ua = parseUA();if (!ua.mobile) { ?location.href = ‘./pc.html‘;}复制代码14.Rem移动端适配
var rem = { ?baseRem: 40, ?// 基准字号，按照iphone6应该为20，此处扩大2倍，便于计算 ?baseWidth: 750, ?// 基准尺寸宽，此处是按照ihpone6的尺寸 ?rootEle: document.getElementsByTagName("html")[0], ?initHandle: function() { ???this.setRemHandle(); ???this.resizeHandle(); ?}, ?setRemHandle: function() { ???var clientWidth = document.documentElement.clientWidth || document.body.clientWidth; ???this.rootEle.style.fontSize = clientWidth * this.baseRem / this.baseWidth + "px"; ?}, ?resizeHandle: function() { ???var that = this; ???window.addEventListener("resize", ???function() { ?????setTimeout(function() { ???????that.setRemHandle(); ?????}, ?????300); ???}); ?}};rem.initHandle();复制代码15.获取url后参数
function GetRequest() { ?var url = location.search; //获取url中"?"符后的字串 ?var theRequest = new Object(); ?if (url.indexOf("?") != -1) { ???var str = url.substr(1); ???strs = str.split("&"); ???for (var i = 0; i < strs.length; i++) { ?????theRequest[strs[i].split("=")[0]] = (strs[i].split("=")[1]); ???} ?} ?return theRequest;}复制代码16.动态加载JS
function loadScript(url, callback) { ?var script = document.createElement("script"); ?script.type = "text/"; ?if (typeof(callback) != "undefined") { ???if (script.readyState) { ?????script.onreadystatechange = function() { ???????if (script.readyState == "loaded" || script.readyState == "complete") { ?????????script.onreadystatechange = null; ?????????callback(); ???????} ?????}; ???} else { ?????script.onload = function() { ???????callback(); ?????}; ???} ?} ?script.src = url; ?document.body.appendChild(script);}复制代码17.生成随机颜色值
function getRandomColor () { ?const rgb = [] ?for (let i = 0 ; i < 3; ++i){ ???let color = Math.floor(Math.random() * 256).toString(16) ???color = color.length == 1 ? ‘0‘ + color : color ???rgb.push(color) ?} ?return ‘#‘ + rgb.join(‘‘)}