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
  • 18.事件绑定与解绑
  • 19.移动端音频播放
  • 20.移动端视频适配
  • 21.Webpack+Vue-CLI实现自动全局注册组件

1.截取指定字节数的字符串

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/**
* 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;
}

2.判断是否微信

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/**
* 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;
}
}

3.获取时间格式的几个举例

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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
}

4.获取字符串字节长度

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/**
* 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;
}

5.对象克隆、深拷贝

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/**
* 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;
};

克隆拷贝增强版

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/**
* 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 (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.");
}

测试用例:

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var origin = {
a: "text",
b: null,
c: undefined,
e: {
f: [1, 2]
}
}

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:

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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;
}

7.身份证号验证

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/**
* 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)
}

8.js正则为url添加http标识

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<!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>

9.URL有效性校验方法

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/**
* 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);
}

10.自定义jsonp方法

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/**
* 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('&');
}

11.cookie操作

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//写cookies
setCookie = 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cookies
getCookie = function(name) {
var arr, reg = new RegExp("(^| )" + name + "=([^;]*)(;|$)");
if (arr = document.cookie.match(reg)) return (arr[2]);
else return null;
}

//删除cookies
delCookie = 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();
}

12.生成随机字符串 (可指定长度)

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/**
* 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;
}

13.浏览器判断

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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';
}

14.Rem移动端适配

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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();

15.获取url后参数

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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;
}

16.动态加载JS

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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);
}

17.生成随机颜色值

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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('')
}

18.事件绑定与解绑

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ElementClass.prototype.on = function (name, callback) {
this.callbacks[name] = this.callbacks[name] || []
this.callbacks[name].push(callback)
}

ElementClass.prototype.off = function (name, callback) {
var callbacks = this.callbacks[name]
if (callbacks && callbacks instanceof Array) {
var index = callbacks.indexOf(callback)
if (index !== -1) callbacks.splice(index, 1)
}
}

ElementClass.prototype.trigger = function (name, params) {
var callbacks = this.callbacks[name]
if (callbacks && callbacks instanceof Array) {
callbacks.forEach((cb) => {
cb(params)
})
}
}

19.移动端音频播放

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/**
* 移动端H5播放音乐处理,兼容微信端
* @param el 音乐Audio元素
*/
function playMusic(el) {
var b = document.getElementById(el);

var c = function c() {
b.play();
document.removeEventListener("touchstart", c, true);
};

b.play();
document.addEventListener("WeixinJSBridgeReady", function () {
c();
}, false);
document.addEventListener("YixinJSBridgeReady", function () {
c();
}, false);
document.addEventListener("touchstart", c, true);
}

20.移动端视频适配

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<video class="video1" webkit-playsinline="true" x-webkit-airplay="true" playsinline="true" x5-video-player-type="h5" x5-video-player-fullscreen="true"  preload="auto" poster="poster图片地址" src="视频地址"></video>

21.Webpack+Vue-CLI实现自动全局注册组件

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// 需要 npm import --save lodash
import upperFirst from 'lodash/upperFirst'
import camelCase from 'lodash/camelCase'

const requireComponent = require.context(
// 其组件目录的相对路径
'./components',
// 是否查询其子目录
false,
// 匹配基础组件文件名的正则表达式,获取.vue结尾的文件
/.vue$/
)


requireComponent.keys().forEach(fileName => {
// 获取组件配置
const componentConfig = requireComponent(fileName)

// 获取组件的 PascalCase 命名
const componentName = upperFirst(
camelCase(
// 剥去文件名开头的 `./` 和结尾的扩展名
fileName.replace(/^\.\/(.*)\.\w+$/, '$1')
)
)

// 全局注册组件
Vue.component(
componentName,
// 如果这个组件选项是通过 `export default` 导出的,
// 那么就会优先使用 `.default`,
// 否则回退到使用模块的根。
componentConfig.default || componentConfig
)