原文鏈接
目錄：
- 截取指定字節數的字符串
- 判斷是否微信
- 獲取時間格式的幾個舉例
- 獲取字符串字節長度
- 對象克隆、深拷貝
- 組織結構代碼證驗證
- 身份證號驗證
- js正則為url添加http標識
- URL有效性校驗方法
- 自定義jsonp方法
- cookie操作
- 生成隨機字符串 (可指定長度)
- 瀏覽器判斷
- Rem移動端適配
- 獲取url后參數
- 動態加載JS
- 生成隨機顏色值
1.截取指定字節數的字符串
/**
* 截取指定字節的字符串
* @param str 要截取的字符穿
* @param len 要截取的長度，根據字節計算
* @param suffix 截取前len個后，其余的字符的替換字符，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.判斷是否微信
/**
* 判斷微信瀏覽器
* @returns {Boolean}
*/
function isWeiXin() {
var ua = window.navigator.userAgent.toLowerCase();
if (ua.match(/MicroMessenger/i) == 'micromessenger') {
return true;
} else {
return false;
}
}
3.獲取時間格式的幾個舉例
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
}
4.獲取字符串字節長度
/**
* 獲取字符串字節長度
* @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.對象克隆、深拷貝
/**
* 對象克隆&深拷貝
* @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;
};
克隆拷貝增強版
/**
* 對象克隆&深拷貝
* @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.");
}
6.組織結構代碼證驗證
驗證規則：
組織機構代碼是每一個機關、社會團體、企事業單位在全國范圍內唯一的、始終不變的法定代碼標識。最新使用的組織機構代碼在1997年頒布實施，由8位數字（或大寫拉丁字母）本體代碼和1位數字（或大寫拉丁字母）校驗碼組成。本體代碼采用系列（即分區段）順序編碼方法。校驗碼按下列公式計算：8 C9 = 11 - MOD(∑Ci * Wi，11)… (2) i = 1其中：MOD——表示求余函數；i——表示代碼字符從左到右位置序號；Ci——表示第i位置上的代碼字符的值，采用附錄A“代碼字符集”所列字符；C9——表示校驗碼；Wi——表示第i位置上的加權因子，其數值如下表：i 1 2 3 4 5 6 7 8 Wi 3 7 9 10 5 8 4 2當MOD函數值為1（即C9 = 10）時，校驗碼用字母X表示。
驗證方法：
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}$/;
if (!reg.test(values[0])) {
return false
}
var sum = 0;
for (var i = 0; i < 8; i++) {
sum += str.indexOf(values[0].charAt(i)) * ws[i];
}
var C9 = 11 - (sum % 11);
var YC9 = values[1] + '';
if (C9 == 11) {
C9 = '0';
} else if (C9 == 10) {
C9 = 'X';
} else {
C9 = C9 + '';
}
return YC9 == C9;
}
7.身份證號驗證
/**
* 驗證身份證號
* @param el 號碼輸入input
* @returns {boolean}
*/
function checkCardNo(el) {
var txtval = el.value;
var reg = /(^\d{15}$)|(^\d{18}$)|(^\d{17}(\d|X|x)$)/;
return reg.test(txtval)
}
8.js正則為url添加http標識
<!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有效性校驗方法
/**
* URL有效性校驗
* @param str_url
* @returns {boolean}
*/
function isURL(str_url) {
// 驗證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
+ "|" // 允許IP和DOMAIN（域名）
+ "([0-9a-z_!~*'()-]+\.)*" // 域名- www.
+ "([0-9a-z][0-9a-z-]{0,61})?[0-9a-z]\." // 二級域名
+ "[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);
}
// 建議的正則
functionisURL(str) {
return !! str.match(/(((^https?:(?:\/\/)?)(?:[-;:&=\+\$,\w]+@)?[A-Za-z0-9.-]+|(?:www.|[-;:&=\+\$,\w]+@)[A-Za-z0-9.-]+)((?:\/[\+~%\/.\w-_]*)?\??(?:[-\+=&;%@.\w_]*)#?(?:[\w]*))?)$/g);
}
10.自定義jsonp方法
/**
* 自定義封裝jsonp方法
* @param options
*/
jsonp = function(options) {
options = options || {};
if (!options.url || !options.callback) {
throw new Error("參數不合法");
}
//創建 script 標簽并加入到頁面中
var callbackName = ('jsonp_' + Math.random()).replace(".", "");
var oHead = document.getElementsByTagName('head')[0];
options.data[options.callback] = callbackName;
var params = formatParams(options.data);
var oS = document.createElement('script');
oHead.appendChild(oS);
//創建jsonp回調函數
window[callbackName] = function(json) {
oHead.removeChild(oS);
clearTimeout(oS.timer);
window[callbackName] = null;
options.success && options.success(json);
};
//發送請求
oS.src = options.url + '?' + params;
//超時處理
if (options.time) {
oS.timer = setTimeout(function() {
window[callbackName] = null;
oHead.removeChild(oS);
options.fail && options.fail({
message: "超時"
});
},
time);
}
};
/**
* 格式化參數
* @param data
* @returns {string}
*/
formatParams = function(data) {
var arr = [];
for (var name in data) {
arr.push(encodeURIComponent(name) + '=' + encodeURIComponent(data[name]));
}
return arr.join('&');
}
11.cookie操作
//寫cookies
setCookie = function(name, value, time) {
var strsec = getsec(time);
var exp = new Date();
exp.setTime(exp.getTime() + strsec * 1);
document.cookie = name + "=" + escape(value) + ";expires=" + exp.toGMTString();
}
//cookie操作輔助函數
getsec = function(str) {
var str1 = str.substring(1, str.length) * 1;
var str2 = str.substring(0, 1);
if (str2 == "s") {
return str1 * 1000;
} else if (str2 == "h") {
return str1 * 60 * 60 * 1000;
} else if (str2 == "d") {
return str1 * 24 * 60 * 60 * 1000;
}
}
//讀取cookies
getCookie = function(name) {
var arr, reg = new RegExp("(^| )" + name + "=([^;]*)(;|$)");
if (arr = document.cookie.match(reg)) return (arr[2]);
else return null;
}
//刪除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.生成隨機字符串 (可指定長度)
/**
* 生成隨機字符串(可指定長度)
* @param len
* @returns {string}
*/
randomString = function(len) {
len = len || 8;
var $chars = 'ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz2345678';
/****默認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.瀏覽器判斷
function parseUA() {
var u = navigator.userAgent;
var u2 = navigator.userAgent.toLowerCase();
return { //移動終端瀏覽器版本信息
trident: u.indexOf('Trident') > -1,
//IE內核
presto: u.indexOf('Presto') > -1,
//opera內核
webKit: u.indexOf('AppleWebKit') > -1,
//蘋果、谷歌內核
gecko: u.indexOf('Gecko') > -1 && u.indexOf('KHTML') == -1,
//火狐內核
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('Linux') > -1,
//android終端或uc瀏覽器
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
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移動端適配
var rem = {
baseRem: 40,
// 基準字號，按照iphone6應該為20，此處擴大2倍，便于計算
baseWidth: 750,
// 基準尺寸寬，此處是按照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.獲取url后參數
function GetRequest() {
var url = location.search; //獲取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.動態加載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);
}
17.生成隨機顏色值
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('')
}
