javascript常用工具类的封装
2024-05-31 09:23:40
目录
- 一、js数组工具类
- 工具类方法
- 工具类代码
- 测试MyArrayFn中的所有方法
- 二、js字符串校验工具类
- 工具类方法
- 工具类代码
- 三、js时间Date工具类
- 工具类方法
- 工具类代码
- 四、js浏览器存储相关操作工具类
- 工具类方法
- 工具类代码
- 五、js字符串工具类
- 工具类方法
- 工具类代码
- 六、js数字相关操作工具类
- 工具类方法
- 工具类代码
- 测试NumberFn中的所有方法
- 七、js base64编码工具方法
- Base64编码的作用
- 使用Base64编码原因
- 工具类代码
- 测试base64方法
- 八、js原生dom节点操作工具类
- 工具类方法
- 工具类代码
- 九、js原生http请求工具类
- 工具类方法
- 工具类代码
- 十、js其他高频率使用的工具类
- 工具类方法
- 工具类代码
- 源码下载
一、js数组工具类
工具类方法
MyArrayFn包含的方法如下
- 判断一个元素是否在数组中
- 遍历元素：相当于原生forEach方法
- 遍历元素,对里面的每个值做处理再返回一个新的值：相当于原生map方法
- 数组排序：从小到大、从大到小、随机
- 去重
- 求两个集合的并集
- 求两个集合的交集
- 删除其中一个元素
- 最大值
- 最小值
- 求和
- 平均值
工具类代码
// js数组工具类
class MyArrayFn {/*判断一个元素是否在数组中*/contains(arr, val) {return arr.indexOf(val) != -1 ? true : false;}/*** 遍历元素：相当于原生forEach方法* @param {arr} 数组* @param {fn} 回调函数* @return {undefined}*/each(arr, fn) {fn = fn || Function;var a = [];var args = Array.prototype.slice.call(arguments, 1);for (var i = 0; i < arr.length; i++) {var res = fn.apply(arr, [arr[i], i].concat(args));if (res != null) a.push(res);}}/*** 遍历元素,对里面的每个值做处理再返回一个新的值：相当于原生map方法* @param {arr} 数组* @param {fn} 回调函数* @param {thisObj} this指向* @return {Array} */map(arr, fn, thisObj) {var scope = thisObj || window;var a = [];for (var i = 0, j = arr.length; i < j; ++i) {var res = fn.call(scope, arr[i], i, this);if (res != null) a.push(res);}return a;}/*** 数组排序* @param {arr} 数组* @param {type} 1：从小到大 2：从大到小 3：随机* @return {Array}*/sort(arr, type) {return arr.sort((a, b) => {switch (type) {case 1:return a - b;case 2:return b - a;case 3:return Math.random() - 0.5;default:return arr;}})}/*去重*/unique(arr) {if (Array.hasOwnProperty('from')) {return Array.from(new Set(arr));} else {var n = {},r = [];for (var i = 0; i < arr.length; i++) {if (!n[arr[i]]) {n[arr[i]] = true;r.push(arr[i]);}}return r;}// 注：上面 else 里面的排重并不能区分 2 和 '2'，但能减少用indexOf带来的性能/* 正确排重if ( Array.hasOwnProperty('from') ) {return Array.from(new Set(arr))}else{var r = [], NaNBol = truefor(var i=0; i < arr.length; i++) {if (arr[i] !== arr[i]) {if (NaNBol && r.indexOf(arr[i]) === -1) {r.push(arr[i])NaNBol = false}}else{if(r.indexOf(arr[i]) === -1) r.push(arr[i])}}return r}*/}/*求两个集合的并集*/union(a, b) {var newArr = a.concat(b);return this.unique(newArr);}/*求两个集合的交集*/intersect(a, b) {var _this = this;a = this.unique(a);return this.map(a, function(o) {return _this.contains(b, o) ? o : null;});}/*删除其中一个元素*/remove(arr, ele) {var index = arr.indexOf(ele);if (index > -1) {arr.splice(index, 1);}return arr;}/*将类数组转换为数组的方法*/formArray(ary) {var arr = [];if (Array.isArray(ary)) {arr = ary;} else {arr = Array.prototype.slice.call(ary);};return arr;}/*最大值*/max(arr) {return Math.max.apply(null, arr);}/*最小值*/min(arr) {return Math.min.apply(null, arr);}/*求和*/sum(arr) {return arr.reduce((pre, cur) => {return pre + cur})}/*平均值*/average(arr) {return this.sum(arr) / arr.length}
}
测试MyArrayFn中的所有方法
let myArrayFn = new MyArrayFn();
var arr = [1, 2, 3, 4, 5, 6];
console.log('测试判断一个元素是否在数组中(contains): ', myArrayFn.contains(arr, 5));
console.log('测试判断一个元素是否在数组中(contains): ', myArrayFn.contains(arr, 10));
var a = "";
myArrayFn.each(arr, function(element) {a = a + " " + element;
})
console.log('测试遍历数组的方法(each): ', a);
var b = myArrayFn.map(arr, function(element) {return element * 2;
}, arr)
console.log('测试将数组中每个元素*2(map): ', b);
console.log('测试排序倒序(sort): ', myArrayFn.sort(arr, 2));
console.log('测试排序顺序(sort): ', myArrayFn.sort(arr, 1));var arr2 = [4, 4, 5, 6, 7, 8]console.log('测试去重(unique): ', myArrayFn.unique(arr2));
console.log('测试求两个数组并集(union): ', myArrayFn.union(arr, arr2));
console.log('测试求最大值(max): ', myArrayFn.max(arr));
console.log('测试求最小值(min): ', myArrayFn.min(arr));
console.log('测试求和(sum): ', myArrayFn.sum(arr));
console.log('测试平均值(average): ', myArrayFn.average(arr));
console.log('测试删除指定元素5(remove) :>> ', myArrayFn.remove(arr, 5));
测试结果如下：
二、js字符串校验工具类
工具类方法
TypeFn包含的方法如下
- 是否为字符串
- 是否为数字
- 是否为boolean
- 是否为函数
- 是否为为null
- 是否为undefined
- 是否为对象
- 是否为数组
- 是否为时间
- 是否为正则
- 是否为错误对象
- 是否为Symbol函数
- 是否为Promise对象
- 是否为Set对象
- 对象为空(false)
- 对象不为空(true)
- 是否为Ios端
- 是否为Android端
- 是否为PC端
- 是否为微信浏览器
- 获取浏览器内核
- 严格的身份证校验
- 校验字符串是否为以下类型(手机号码、座机、身份证、密码以字母开头，长度在6~18之间，只能包含字母、数字和下划线、邮政编码、QQ号、邮箱、金额(小数点2位)、网址、IP、日期时间、数字、英文、中文、小写、大写、HTML标记)
工具类代码
// js字符串校验工具类
class TypeFn {isString(o) { //是否字符串return Object.prototype.toString.call(o).slice(8, -1) === 'String'}isNumber(o) { //是否数字return Object.prototype.toString.call(o).slice(8, -1) === 'Number'}isBoolean(o) { //是否booleanreturn Object.prototype.toString.call(o).slice(8, -1) === 'Boolean'}isFunction(o) { //是否函数return Object.prototype.toString.call(o).slice(8, -1) === 'Function'}isNull(o) { //是否为nullreturn Object.prototype.toString.call(o).slice(8, -1) === 'Null'}isUndefined(o) { //是否undefinedreturn Object.prototype.toString.call(o).slice(8, -1) === 'Undefined'}isObj(o) { //是否对象return Object.prototype.toString.call(o).slice(8, -1) === 'Object'}isArray(o) { //是否数组return Object.prototype.toString.call(o).slice(8, -1) === 'Array'}isDate(o) { //是否时间return Object.prototype.toString.call(o).slice(8, -1) === 'Date'}isRegExp(o) { //是否正则return Object.prototype.toString.call(o).slice(8, -1) === 'RegExp'}isError(o) { //是否错误对象return Object.prototype.toString.call(o).slice(8, -1) === 'Error'}isSymbol(o) { //是否Symbol函数return Object.prototype.toString.call(o).slice(8, -1) === 'Symbol'}isPromise(o) { //是否Promise对象return Object.prototype.toString.call(o).slice(8, -1) === 'Promise'}isSet(o) { //是否Set对象return Object.prototype.toString.call(o).slice(8, -1) === 'Set'}isFalse(o) { //对象为空(false)if (o == '' || o == undefined || o == null || o == 'null' || o == 'undefined' || o == 0 || o == false || o == NaN) return truereturn false}isTrue(o) { //对象不为空(true)return !this.isFalse(o)}isIos() { // 是否为Ios端if (/(iPhone|iPad|iPod|iOS)/i.test(navigator.userAgent)) {// this.phoneType = '苹果系统'return true;} else if (/(Android)/i.test(navigator.userAgent)) {// this.phoneType = '安卓系统'return false;} else if (/(SymbianOS)/i.test(navigator.userAgent)) {// this.phoneType = '鸿蒙系统'return false;} else {// this.phoneType = 'PC电脑'return false;};}isAndroid() { // 是否为Android端if (/(iPhone|iPad|iPod|iOS)/i.test(navigator.userAgent)) {// this.phoneType = '苹果系统'return false;} else if (/(Android)/i.test(navigator.userAgent)) {// this.phoneType = '安卓系统'return true;} else if (/(SymbianOS)/i.test(navigator.userAgent)) {// this.phoneType = '鸿蒙系统'return false;} else {// this.phoneType = 'PC电脑'return false;};}isPC() { //是否为PC端var userAgentInfo = navigator.userAgent;var Agents = ["Android", "iPhone","SymbianOS", "Windows Phone","iPad", "iPod"];var flag = true;for (var v = 0; v < Agents.length; v++) {if (userAgentInfo.indexOf(Agents[v]) > 0) {flag = false;break;}}return flag;}isWeiXin() { // 是否为微信浏览器var ua = navigator.userAgent.toLowerCase();if (ua.match(/MicroMessenger/i) == 'micromessenger') {// this.isweChat = '微信'return true} else {// this.isweChat = '浏览器'return false}}browserType() { // 获取浏览器内核var userAgent = navigator.userAgent; //取得浏览器的userAgent字符串var isOpera = userAgent.indexOf("Opera") > -1; //判断是否Opera浏览器var isIE = userAgent.indexOf("compatible") > -1 && userAgent.indexOf("MSIE") > -1 && !isOpera; //判断是否IE浏览器var isIE11 = userAgent.indexOf('Trident') > -1 && userAgent.indexOf("rv:11.0") > -1;var isEdge = userAgent.indexOf("Edge") > -1 && !isIE; //判断是否IE的Edge浏览器 var isFF = userAgent.indexOf("Firefox") > -1; //判断是否Firefox浏览器var isSafari = userAgent.indexOf("Safari") > -1 && userAgent.indexOf("Chrome") == -1; //判断是否Safari浏览器var isChrome = userAgent.indexOf("Chrome") > -1 && userAgent.indexOf("Safari") > -1; //判断Chrome浏览器if (isIE) {var reIE = new RegExp("MSIE (\\d+\\.\\d+);");reIE.test(userAgent);var fIEVersion = parseFloat(RegExp["$1"]);if (fIEVersion == 7) return "IE7"else if (fIEVersion == 8) return "IE8";else if (fIEVersion == 9) return "IE9";else if (fIEVersion == 10) return "IE10";else return "IE7以下" //IE版本过低}if (isIE11) return 'IE11';if (isEdge) return "Edge";if (isFF) return "FF";if (isOpera) return "Opera";if (isSafari) return "Safari";if (isChrome) return "Chrome";}checkStr(str, type) { // 校验字符串是否为以下类型switch (type) {case 'phone': //手机号码return /^1[3|4|5|6|7|8][0-9]{9}$/.test(str);case 'tel': //座机return /^(0\d{2,3}-\d{7,8})(-\d{1,4})?$/.test(str);case 'card': //身份证return /(^\d{15}$)|(^\d{18}$)|(^\d{17}(\d|X|x)$)/.test(str);case 'pwd': //密码以字母开头，长度在6~18之间，只能包含字母、数字和下划线return /^[a-zA-Z]\w{5,17}$/.test(str)case 'postal': //邮政编码return /[1-9]\d{5}(?!\d)/.test(str);case 'QQ': //QQ号return /^[1-9][0-9]{4,9}$/.test(str);case 'email': //邮箱return /^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/.test(str);case 'money': //金额(小数点2位)return /^\d*(?:\.\d{0,2})?$/.test(str);case 'URL': //网址return /(http|ftp|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&:/~\+#]*[\w\-\@?^=%&/~\+#])?/.test(str)case 'IP': //IPreturn /((?:(?:25[0-5]|2[0-4]\\d|[01]?\\d?\\d)\\.){3}(?:25[0-5]|2[0-4]\\d|[01]?\\d?\\d))/.test(str);case 'date': //日期时间return /^(\d{4})\-(\d{2})\-(\d{2}) (\d{2})(?:\:\d{2}|:(\d{2}):(\d{2}))$/.test(str) || /^(\d{4})\-(\d{2})\-(\d{2})$/.test(str)case 'number': //数字return /^[0-9]$/.test(str);case 'english': //英文return /^[a-zA-Z]+$/.test(str);case 'chinese': //中文return /^[\u4E00-\u9FA5]+$/.test(str);case 'lower': //小写return /^[a-z]+$/.test(str);case 'upper': //大写return /^[A-Z]+$/.test(str);case 'HTML': //HTML标记return /<("[^"]*"|'[^']*'|[^'">])*>/.test(str);default:return true;}}// 严格的身份证校验isCardID(sId) {if (!/(^\d{15}$)|(^\d{17}(\d|X|x)$)/.test(sId)) {alert('你输入的身份证长度或格式错误')return false}//身份证城市var aCity = {11: "北京",12: "天津",13: "河北",14: "山西",15: "内蒙古",21: "辽宁",22: "吉林",23: "黑龙江",31: "上海",32: "江苏",33: "浙江",34: "安徽",35: "福建",36: "江西",37: "山东",41: "河南",42: "湖北",43: "湖南",44: "广东",45: "广西",46: "海南",50: "重庆",51: "四川",52: "贵州",53: "云南",54: "西藏",61: "陕西",62: "甘肃",63: "青海",64: "宁夏",65: "新疆",71: "台湾",81: "香港",82: "澳门",91: "国外"};if (!aCity[parseInt(sId.substr(0, 2))]) {alert('你的身份证地区非法')return false}// 出生日期验证var sBirthday = (sId.substr(6, 4) + "-" + Number(sId.substr(10, 2)) + "-" + Number(sId.substr(12, 2))).replace(/-/g, "/"),d = new Date(sBirthday)if (sBirthday != (d.getFullYear() + "/" + (d.getMonth() + 1) + "/" + d.getDate())) {alert('身份证上的出生日期非法')return false}// 身份证号码校验var sum = 0,weights = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2],codes = "10X98765432"for (var i = 0; i < sId.length - 1; i++) {sum += sId[i] * weights[i];}var last = codes[sum % 11]; //计算出来的最后一位身份证号码if (sId[sId.length - 1] != last) {alert('你输入的身份证号非法')return false}return true}
}
三、js时间Date工具类
工具类方法
有关Date的工具方法也可以参考我之前的总结：https://qkongtao.cn/?p=1284
- 返回指定长度的月份集合(该月前/后几个月份的日期)
- 返回指定长度的天数集合(该天前/后几个天日期)
- 秒数转字符串(formatHMS(3610) =>1h0m10s)
- 获取某月有多少天
- 获取某年有多少天
- 获取某年的第一天
- 获取某年最后一天
- 获取某个日期是当年中的第几天
- 获取某个日期在这一年的第几周
工具类代码
class DateFn {/*** 返回指定长度的月份集合* * @param {time} 时间* @param {len} 长度* @param {direction} 方向： 1: 前几个月; 2: 后几个月; 3:前后几个月 默认 3* @return {Array} 数组* * @example getMonths('2018-1-29', 6, 1) // -> ["2018-1", "2017-12", "2017-11", "2017-10", "2017-9", "2017-8", "2017-7"]*/getMonths(time, len, direction) {var mm = new Date(time).getMonth() + 1,yy = new Date(time).getFullYear(),direction = isNaN(direction) ? 3 : direction,index = mm;var cutMonth = function(index) {var arrif (direction === 1) {arr = formatPre(index).reverse()} else if (direction === 2) {arr = formatNext(index)} else {arr = formatPre(index).reverse().slice(len / 2).concat(formatNext(index).slice(1, len / 2 + 1))}return arr.sort(function(t1, t2) {return new Date(t1).getTime() - new Date(t2).getTime()})}var formatPre = function(index) {var currNum = index,preNum = 0,currArr = [],preArr = []if (index - len < 0) {preNum = len - currNum}for (var i = 0; i < currNum; i++) {currArr.push([yy + '-' + (currNum - i)])}for (var i = 1; i <= preNum; i++) {preArr.push([(yy - Math.ceil(i / 12)) + '-' + (12 - (i - 1) % 12)])}return currArr.concat(preArr)}var formatNext = function(index) {var currNum = 12 - index,nextNum = 0,currArr = [],nextArr = []if (len - currNum > 0) {nextNum = len - currNum}for (var i = 0; i <= currNum; i++) {currArr.push([yy + '-' + (index + i)])}for (var i = 1; i < nextNum; i++) {nextArr.push([(yy + Math.ceil(i / 12)) + '-' + (i % 13 === 0 ? 1 : i % 13)])}return currArr.concat(nextArr)}return cutMonth(index)}/*** 返回指定长度的天数集合* * @param {time} 时间* @param {len} 长度* @param {direction} 方向： 1: 前几天; 2: 后几天; 3:前后几天 默认 3* @return {Array} 数组** @example date.getDays('2018-1-29', 6) // -> ["2018-1-26", "2018-1-27", "2018-1-28", "2018-1-29", "2018-1-30", "2018-1-31", "2018-2-1"]*/getDays(time, len, diretion) {var tt = new Date(time)var getDay = function(day) {var t = new Date(time)t.setDate(t.getDate() + day)var m = t.getMonth() + 1return t.getFullYear() + '-' + m + '-' + t.getDate()}var arr = []if (diretion === 1) {for (var i = 1; i <= len; i++) {arr.unshift(getDay(-i))}} else if (diretion === 2) {for (var i = 1; i <= len; i++) {arr.push(getDay(i))}} else {for (var i = 1; i <= len; i++) {arr.unshift(getDay(-i))}arr.push(tt.getFullYear() + '-' + (tt.getMonth() + 1) + '-' + tt.getDate())for (var i = 1; i <= len; i++) {arr.push(getDay(i))}}return diretion === 1 ? arr.concat([tt.getFullYear() + '-' + (tt.getMonth() + 1) + '-' + tt.getDate()]) :diretion === 2 ? [tt.getFullYear() + '-' + (tt.getMonth() + 1) + '-' + tt.getDate()].concat(arr) : arr}/*** @param {s} 秒数* @return {String} 字符串 ** @example formatHMS(3610) // -> 1h0m10s*/formatHMS(s) {var str = ''if (s > 3600) {str = Math.floor(s / 3600) + 'h' + Math.floor(s % 3600 / 60) + 'm' + s % 60 + 's'} else if (s > 60) {str = Math.floor(s / 60) + 'm' + s % 60 + 's'} else {str = s % 60 + 's'}return str}/*获取某月有多少天*/getMonthOfDay(time) {var date = new Date(time)var year = date.getFullYear()var mouth = date.getMonth() + 1var days//当月份为二月时，根据闰年还是非闰年判断天数if (mouth == 2) {days = (year % 4 == 0 && year % 100 == 0 && year % 400 == 0) || (year % 4 == 0 && year % 100 != 0) ? 28 : 29} else if (mouth == 1 || mouth == 3 || mouth == 5 || mouth == 7 || mouth == 8 || mouth == 10 || mouth == 12) {//月份为：1,3,5,7,8,10,12 时，为大月.则天数为31；days = 31} else {//其他月份，天数为：30.days = 30}return days}/*获取某年有多少天*/getYearOfDay(time) {var firstDayYear = this.getFirstDayOfYear(time);var lastDayYear = this.getLastDayOfYear(time);var numSecond = (new Date(lastDayYear).getTime() - new Date(firstDayYear).getTime()) / 1000;return Math.ceil(numSecond / (24 * 3600));}/*获取某年的第一天*/getFirstDayOfYear(time) {var year = new Date(time).getFullYear();return year + "-01-01 00:00:00";}/*获取某年最后一天*/getLastDayOfYear(time) {var year = new Date(time).getFullYear();var dateString = year + "-12-01 00:00:00";var endDay = this.getMonthOfDay(dateString);return year + "-12-" + endDay + " 23:59:59";}/*获取某个日期是当年中的第几天*/getDayOfYear(time) {var firstDayYear = this.getFirstDayOfYear(time);var numSecond = (new Date(time).getTime() - new Date(firstDayYear).getTime()) / 1000;return Math.ceil(numSecond / (24 * 3600));}/*获取某个日期在这一年的第几周*/getDayOfYearWeek(time) {var numdays = this.getDayOfYear(time);return Math.ceil(numdays / 7);}
}
四、js浏览器存储相关操作工具类
js浏览器存储相关操作：cookie、localStorage、sessionStorage
工具类方法
- 设置cookie
- 获取cookie
- 删除cookie
- 设置localStorage
- 获取localStorage
- 移除localStorage
- 移除所有localStorage
- 设置sessionStorage
- 获取sessionStorage
- 移除sessionStorage
- 移除所有sessionStorage
工具类代码
// js浏览器存储相关操作：cookie、localStorage、sessionStorage
class StorageFn {constructor() {this.ls = window.localStorage;this.ss = window.sessionStorage;}/*-----------------cookie---------------------*//*设置cookie*/setCookie(name, value, day) {var setting = arguments[0];if (Object.prototype.toString.call(setting).slice(8, -1) === 'Object') {for (var i in setting) {var oDate = new Date();oDate.setDate(oDate.getDate() + day);document.cookie = i + '=' + setting[i] + ';expires=' + oDate;}} else {var oDate = new Date();oDate.setDate(oDate.getDate() + day);document.cookie = name + '=' + value + ';expires=' + oDate;}}/*获取cookie*/getCookie(name) {var arr = document.cookie.split('; ');for (var i = 0; i < arr.length; i++) {var arr2 = arr[i].split('=');if (arr2[0] == name) {return arr2[1];}}return '';}/*删除cookie*/removeCookie(name) {this.setCookie(name, 1, -1);}/*-----------------localStorage---------------------*//*设置localStorage*/setLocal(key, val) {var setting = arguments[0];if (Object.prototype.toString.call(setting).slice(8, -1) === 'Object') {for (var i in setting) {this.ls.setItem(i, JSON.stringify(setting[i]))}} else {this.ls.setItem(key, JSON.stringify(val))}}/*获取localStorage*/getLocal(key) {if (key) return JSON.parse(this.ls.getItem(key))return null;}/*移除localStorage*/removeLocal(key) {this.ls.removeItem(key)}/*移除所有localStorage*/clearLocal() {this.ls.clear()}/*-----------------sessionStorage---------------------*//*设置sessionStorage*/setSession(key, val) {var setting = arguments[0];if (Object.prototype.toString.call(setting).slice(8, -1) === 'Object') {for (var i in setting) {this.ss.setItem(i, JSON.stringify(setting[i]))}} else {this.ss.setItem(key, JSON.stringify(val))}}/*获取sessionStorage*/getSession(key) {if (key) return JSON.parse(this.ss.getItem(key))return null;}/*移除sessionStorage*/removeSession(key) {this.ss.removeItem(key)}/*移除所有sessionStorage*/clearSession() {this.ss.clear()}
}
五、js字符串工具类
工具类方法
- 去除空格(1：所有空格 2：前后空格 3：前空格 4：后空格)
- 字符串转换(1：首字母大写 2：首页母小写 3：大小写转换 4：全部大写 5：全部小写)
- 检测密码强度(0级、1级、2级、3级、4级)
- 过滤html代码(把<>转换)
工具类代码
class StringFn {/*** 去除空格* @param {str}* @param {type} * type: 1-所有空格 2-前后空格 3-前空格 4-后空格* @return {String}*/trim(str, type) {type = type || 1switch (type) {case 1:return str.replace(/\s+/g, "");case 2:return str.replace(/(^\s*)|(\s*$)/g, "");case 3:return str.replace(/(^\s*)/g, "");case 4:return str.replace(/(\s*$)/g, "");default:return str;}}/*** 字符串转换* @param {str} * @param {type}* type: 1:首字母大写 2：首页母小写 3：大小写转换 4：全部大写 5：全部小写* @return {String}*/changeCase(str, type) {type = type || 4switch (type) {case 1:return str.replace(/\b\w+\b/g, function(word) {return word.substring(0, 1).toUpperCase() + word.substring(1).toLowerCase();});case 2:return str.replace(/\b\w+\b/g, function(word) {return word.substring(0, 1).toLowerCase() + word.substring(1).toUpperCase();});case 3:return str.split('').map(function(word) {if (/[a-z]/.test(word)) {return word.toUpperCase();} else {return word.toLowerCase()}}).join('')case 4:return str.toUpperCase();case 5:return str.toLowerCase();default:return str;}}/*检测密码强度*/checkPwd(str) {var Lv = 0;if (str.length < 6) {return Lv}if (/[0-9]/.test(str)) {Lv++}if (/[a-z]/.test(str)) {Lv++}if (/[A-Z]/.test(str)) {Lv++}if (/[\.|-|_]/.test(str)) {Lv++}return Lv;}/*过滤html代码(把<>转换)*/filterTag(str) {str = str.replace(/&/ig, "&");str = str.replace(/</ig, "<");str = str.replace(/>/ig, ">");str = str.replace(" ", " ");return str;}
}
六、js数字相关操作工具类
工具类方法
- 随机数范围获取随机数
- 将阿拉伯数字翻译成中文的大写数字
- 将数字转换为大写金额
工具类代码
// js数字相关操作class NumberFn {/*随机数范围*/random(min, max) {if (arguments.length === 2) {return Math.floor(min + Math.random() * ((max + 1) - min))} else {return null;}}/*将阿拉伯数字翻译成中文的大写数字*/numberToChinese(num) {var AA = new Array("零", "一", "二", "三", "四", "五", "六", "七", "八", "九", "十");var BB = new Array("", "十", "百", "仟", "萬", "億", "点", "");var a = ("" + num).replace(/(^0*)/g, "").split("."),k = 0,re = "";for (var i = a[0].length - 1; i >= 0; i--) {switch (k) {case 0:re = BB[7] + re;break;case 4:if (!new RegExp("0{4}//d{" + (a[0].length - i - 1) + "}$").test(a[0]))re = BB[4] + re;break;case 8:re = BB[5] + re;BB[7] = BB[5];k = 0;break;}if (k % 4 == 2 && a[0].charAt(i + 2) != 0 && a[0].charAt(i + 1) == 0)re = AA[0] + re;if (a[0].charAt(i) != 0)re = AA[a[0].charAt(i)] + BB[k % 4] + re;k++;}if (a.length > 1) // 加上小数部分(如果有小数部分){re += BB[6];for (var i = 0; i < a[1].length; i++)re += AA[a[1].charAt(i)];}if (re == '一十')re = "十";if (re.match(/^一/) && re.length == 3)re = re.replace("一", "");return re;}/*将数字转换为大写金额*/changeToChinese(Num) {//判断如果传递进来的不是字符的话转换为字符if (typeof Num == "number") {Num = new String(Num);};Num = Num.replace(/,/g, "") //替换tomoney()中的“,”Num = Num.replace(/ /g, "") //替换tomoney()中的空格Num = Num.replace(/￥/g, "") //替换掉可能出现的￥字符if (isNaN(Num)) { //验证输入的字符是否为数字//alert("请检查小写金额是否正确");return "";};//字符处理完毕后开始转换，采用前后两部分分别转换var part = String(Num).split(".");var newchar = "";//小数点前进行转化for (var i = part[0].length - 1; i >= 0; i--) {if (part[0].length > 10) {return "";//若数量超过拾亿单位，提示}var tmpnewchar = ""var perchar = part[0].charAt(i);switch (perchar) {case "0":tmpnewchar = "零" + tmpnewchar;break;case "1":tmpnewchar = "壹" + tmpnewchar;break;case "2":tmpnewchar = "贰" + tmpnewchar;break;case "3":tmpnewchar = "叁" + tmpnewchar;break;case "4":tmpnewchar = "肆" + tmpnewchar;break;case "5":tmpnewchar = "伍" + tmpnewchar;break;case "6":tmpnewchar = "陆" + tmpnewchar;break;case "7":tmpnewchar = "柒" + tmpnewchar;break;case "8":tmpnewchar = "捌" + tmpnewchar;break;case "9":tmpnewchar = "玖" + tmpnewchar;break;}switch (part[0].length - i - 1) {case 0:tmpnewchar = tmpnewchar + "元";break;case 1:if (perchar != 0) tmpnewchar = tmpnewchar + "拾";break;case 2:if (perchar != 0) tmpnewchar = tmpnewchar + "佰";break;case 3:if (perchar != 0) tmpnewchar = tmpnewchar + "仟";break;case 4:tmpnewchar = tmpnewchar + "万";break;case 5:if (perchar != 0) tmpnewchar = tmpnewchar + "拾";break;case 6:if (perchar != 0) tmpnewchar = tmpnewchar + "佰";break;case 7:if (perchar != 0) tmpnewchar = tmpnewchar + "仟";break;case 8:tmpnewchar = tmpnewchar + "亿";break;case 9:tmpnewchar = tmpnewchar + "拾";break;}var newchar = tmpnewchar + newchar;}//小数点之后进行转化if (Num.indexOf(".") != -1) {if (part[1].length > 2) {// alert("小数点之后只能保留两位,系统将自动截断");part[1] = part[1].substr(0, 2)}for (i = 0; i < part[1].length; i++) {tmpnewchar = ""perchar = part[1].charAt(i)switch (perchar) {case "0":tmpnewchar = "零" + tmpnewchar;break;case "1":tmpnewchar = "壹" + tmpnewchar;break;case "2":tmpnewchar = "贰" + tmpnewchar;break;case "3":tmpnewchar = "叁" + tmpnewchar;break;case "4":tmpnewchar = "肆" + tmpnewchar;break;case "5":tmpnewchar = "伍" + tmpnewchar;break;case "6":tmpnewchar = "陆" + tmpnewchar;break;case "7":tmpnewchar = "柒" + tmpnewchar;break;case "8":tmpnewchar = "捌" + tmpnewchar;break;case "9":tmpnewchar = "玖" + tmpnewchar;break;}if (i == 0) tmpnewchar = tmpnewchar + "角";if (i == 1) tmpnewchar = tmpnewchar + "分";newchar = newchar + tmpnewchar;}}//替换所有无用汉字while (newchar.search("零零") != -1)newchar = newchar.replace("零零", "零");newchar = newchar.replace("零亿", "亿");newchar = newchar.replace("亿万", "亿");newchar = newchar.replace("零万", "万");newchar = newchar.replace("零元", "元");newchar = newchar.replace("零角", "");newchar = newchar.replace("零分", "");if (newchar.charAt(newchar.length - 1) == "元") {newchar = newchar + "整"}return newchar;}}
测试NumberFn中的所有方法
var numberFn = new NumberFn();
var num = numberFn.random(0, 99999999);
console.log('获取一个随机数(random) :>> ', num);
console.log('将阿拉伯数字翻译成中文的大写数字(numberToChinese) :>> ', numberFn.numberToChinese(num));
console.log('将数字转换为大写金额(changeToChinese) :>> ', numberFn.changeToChinese(num));
结果如下：
七、js base64编码工具方法
Base64编码的作用
由于某些系统中只能使用ASCII字符。Base64就是用来将非ASCII字符的数据转换成ASCII字符的一种方法。
Base64其实不是安全领域下的加密解密算法，而是一种编码，也就是说，它是可以被翻译回原来的样子。它并不是一种加密过程。所以base64只能算是一个编码算法，对数据内容进行编码来适合传输。虽然base64编码过后原文也变成不能看到的字符格式，但是这种方式很初级，很简单。
使用Base64编码原因
1.base64是网络上最常见的用于传输8bit字节代码的编码方式之一。
有时我们需要把二进制数据编码为适合放在URL中的形式。这时采用base64编码具有不可读性，即所编码的数据不会被人直接看出。
2.用于在http环境下传递较长的标识信息。
工具类代码
/*** 有时我们需要把二进制数据编码为适合放在URL中的形式。* 这时采用base64编码具有不可读性，即所编码的数据不会被人直接看出。*/function Base64() {// private property _keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";// public method for encoding this.encode = function(input) {var output = "";var chr1, chr2, chr3, enc1, enc2, enc3, enc4;var i = 0;input = _utf8_encode(input);while (i < input.length) {chr1 = input.charCodeAt(i++);chr2 = input.charCodeAt(i++);chr3 = input.charCodeAt(i++);enc1 = chr1 >> 2;enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);enc4 = chr3 & 63;if (isNaN(chr2)) {enc3 = enc4 = 64;} else if (isNaN(chr3)) {enc4 = 64;}output = output +_keyStr.charAt(enc1) + _keyStr.charAt(enc2) +_keyStr.charAt(enc3) + _keyStr.charAt(enc4);}return output;}// public method for decoding this.decode = function(input) {var output = "";var chr1, chr2, chr3;var enc1, enc2, enc3, enc4;var i = 0;input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");while (i < input.length) {enc1 = _keyStr.indexOf(input.charAt(i++));enc2 = _keyStr.indexOf(input.charAt(i++));enc3 = _keyStr.indexOf(input.charAt(i++));enc4 = _keyStr.indexOf(input.charAt(i++));chr1 = (enc1 << 2) | (enc2 >> 4);chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);chr3 = ((enc3 & 3) << 6) | enc4;output = output + String.fromCharCode(chr1);if (enc3 != 64) {output = output + String.fromCharCode(chr2);}if (enc4 != 64) {output = output + String.fromCharCode(chr3);}}output = _utf8_decode(output);return output;}// private method for UTF-8 encoding _utf8_encode = function(string) {string = string.replace(/\r\n/g, "\n");var utftext = "";for (var n = 0; n < string.length; n++) {var c = string.charCodeAt(n);if (c < 128) {utftext += String.fromCharCode(c);} else if ((c > 127) && (c < 2048)) {utftext += String.fromCharCode((c >> 6) | 192);utftext += String.fromCharCode((c & 63) | 128);} else {utftext += String.fromCharCode((c >> 12) | 224);utftext += String.fromCharCode(((c >> 6) & 63) | 128);utftext += String.fromCharCode((c & 63) | 128);}}return utftext;}// private method for UTF-8 decoding _utf8_decode = function(utftext) {var string = "";var i = 0;var c = c1 = c2 = 0;while (i < utftext.length) {c = utftext.charCodeAt(i);if (c < 128) {string += String.fromCharCode(c);i++;} else if ((c > 191) && (c < 224)) {c2 = utftext.charCodeAt(i + 1);string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));i += 2;} else {c2 = utftext.charCodeAt(i + 1);c3 = utftext.charCodeAt(i + 2);string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));i += 3;}}return string;}
}
测试base64方法
var base64 = new Base64();
console.log(base64.encode("如我西沉"));
console.log(base64.decode("5aaC5oiR6KW/5rKJ"));
结果如下
八、js原生dom节点操作工具类
没有使用jQuery，原生js操作dom相对麻烦，该工具类对有关原生dom操作class的方法进行封装。
工具类方法
- 检测是否含有类名
- 添加类名
- 删除类名
- 替换类名
- 获取兄弟节点
- 获取行间样式属性
工具类代码
class DomFn {$(selector) {var type = selector.substring(0, 1);if (type === '#') {if (document.querySelecotor) return document.querySelector(selector)return document.getElementById(selector.substring(1))} else if (type === '.') {if (document.querySelecotorAll) return document.querySelectorAll(selector)return document.getElementsByClassName(selector.substring(1))} else {return document['querySelectorAll' ? 'querySelectorAll' : 'getElementsByTagName'](selector)}}/*检测是否含有类名*/hasClass(ele, name) {return ele.className.match(new RegExp('(\\s|^)' + name + '(\\s|$)'));}/*添加类名*/addClass(ele, name) {if (!this.hasClass(ele, name)) ele.className += " " + name;}/*删除类名*/removeClass(ele, name) {if (this.hasClass(ele, name)) {var reg = new RegExp('(\\s|^)' + name + '(\\s|$)');ele.className = ele.className.replace(reg, '');}}/*替换类名*/replaceClass(ele, newName, oldName) {this.removeClass(ele, oldName);this.addClass(ele, newName);}/*获取兄弟节点*/siblings(ele) {console.log(ele.parentNode)var chid = ele.parentNode.children,eleMatch = [];for (var i = 0, len = chid.length; i < len; i++) {if (chid[i] != ele) {eleMatch.push(chid[i]);}}return eleMatch;}/*获取行间样式属性*/getByStyle(obj, name) {if (obj.currentStyle) {return obj.currentStyle[name];} else {return getComputedStyle(obj, false)[name];}}
}
九、js原生http请求工具类
传统Ajax是利用XMLHttpRequest(XHR)发送请求获取数据，不注重分离的原则。
而Fetch API是基于Promise设计，专为解决XHR问题而出现。
工具类方法
- 原生ajax请求方法封装
- 原生fetchHttp请求方法封装
工具类代码
/*let url = 'http://demo.com/api'例: ajax({url: url,success: function(data) {}})
*/
function ajax(setting){//设置参数的初始值var opts={method: (setting.method || "GET").toUpperCase(), //请求方式url: setting.url || "", // 请求地址async: setting.async || true, // 是否异步dataType: setting.dataType || "json", // 解析方式data: setting.data || "", // 参数success: setting.success || function(){}, // 请求成功回调error: setting.error || function(){} // 请求失败回调}// 参数格式化function params_format (obj) {var str = ''for (var i in obj) {str += i + '=' + obj[i] + '&'}return str.split('').slice(0, -1).join('')}// 创建ajax对象var xhr=new XMLHttpRequest();// 连接服务器open(方法GET/POST，请求地址， 异步传输)if(opts.method == 'GET'){xhr.open(opts.method, opts.url + "?" + params_format(opts.data), opts.async);xhr.send();}else{xhr.open(opts.method, opts.url, opts.async);xhr.setRequestHeader("Content-Type","application/x-www-form-urlencoded");xhr.send(opts.data);}/*** 每当readyState改变时，就会触发onreadystatechange事件** readyState属性存储有XMLHttpRequest的状态信息** 0 ：请求未初始化** 1 ：服务器连接已建立** 2 ：请求已接受** 3 : 请求处理中** 4 ：请求已完成，且相应就绪*/xhr.onreadystatechange = function() {if (xhr.readyState === 4 && (xhr.status === 200 || xhr.status === 304)) {switch(opts.dataType){case "json":var json = JSON.parse(xhr.responseText);opts.success(json);break;case "xml":opts.success(xhr.responseXML);break;default:opts.success(xhr.responseText);break;}}}xhr.onerror = function(err) {opts.error(err);}
}/*let url = 'http://demo.com/api'例: fetchHttp(url).then( res => {console.log(res)}).catch( e => {console.log(e)})fetchHttp(url, {method: 'POST',})
*/
function fetchHttp(url, setting = {}) {//设置参数的初始值let opts={method: (setting.method || 'GET').toUpperCase(), //请求方式headers : setting.headers || {}, // 请求头设置credentials : setting.credentials || true, // 设置cookie是否一起发送body: setting.body || {},mode : setting.mode || 'cors', // 可以设置 cors, no-cors, same-originredirect : setting.redirect || 'follow', // follow, error, manualcache : setting.cache || 'default' // 设置 cache 模式 (default, reload, no-cache)}let dataType = setting.dataType || "json", // 解析方式 data = setting.data || "" // 参数// 参数格式化function params_format (obj) {var str = ''for (var i in obj) {str += `${i}=${obj[i]}&`}return str.split('').slice(0, -1).join('')}if (opts.method === 'GET') {url = url + (data?`?${params_format(data)}`:'')}else{setting.body = data || {}}return new Promise( (resolve, reject) => {fetch(url, opts).then( async res => {let data = dataType === 'text' ? await res.text() :dataType === 'blob' ? await res.blob() : await res.json() resolve(data)}).catch( e => {reject(e)})})
}
十、js其他高频率使用的工具类
工具类方法
- 对象深度克隆
- 防抖（一定连续触发的事件，只在最后执行一次）
- 节流（一段时间内只执行一次）
- 圆形碰撞检测
- 矩形碰撞检测
- 图片压缩
- 获取网址参数
- 获取全部url参数,并转换成json对象
- 删除url指定参数，返回url
- 随机获取十六进制颜色
- 图片加载
- 音频加载
- DOM转字符串
- 字符串转DOM
- 光标所在位置插入字符
工具类代码
class OtherFn {/*** [deepClone 深度克隆]* @param {[type]} obj [克隆对象]* @return {[type]} [返回深度克隆后的对象]*/deepClone(obj) {if (obj === null || typeof obj !== 'object') return objvar isType = function(obj, type) {var flag,typeString = Object.prototype.toString.call(obj)switch (type) {case 'Array':flag = typeString === '[object Array]'breakcase 'Date':flag = typeString === '[object Date]'breakcase 'RegExp':flag = typeString === '[object RegExp]'breakdefault:flag = false}return flag}var getRegExp = function(re) {var flags = ''if (re.global) flags += 'g'if (re.ignoreCase) flags += 'i'if (re.multiline) flags += 'm'return flags}var _clone = function(parent) {var child, proto, parents = [],children = []if (isType(parent, 'Array')) { // 对数组做特殊处理child = [];} else if (isType(parent, 'RegExp')) { // 对正则做特殊处理child = new RegExp(parent.source, getRegExp(parent));if (parent.lastIndex) child.lastIndex = parent.lastIndex;} else if (isType(parent, 'Date')) { // 对Date做特殊处理child = new Date(parent.getTime());} else {// 处理对象原型proto = Object.getPrototypeOf(parent);// 利用Object.create切断原型链child = Object.create(proto);}// 处理循环引用var index = parents.indexOf(parent);if (index != -1) {// 如果父数组存在本对象,说明之前已经被引用过,直接返回此对象return children[index];}parents.push(parent);children.push(child);for (var i in parent) {child[i] = _clone(parent[i]);}return child;}return _clone(obj)}// 函数防抖：一定连续触发的事件，只在最后执行一次，而函数节流一段时间内只执行一次。/*** 防抖动* @param {Function} fn [执行的函数]* @param {[type]} delay [多少秒之后执行]* @param {[type]} immediate [是否立即执行]* @return {[type]} []*/debounce(fn, delay, immediate) {var timeout;return function() {var context = this,args = arguments;var later = function() {timeout = null;if (!immediate) fn.apply(context, args);};var callNow = immediate && !timeout;clearTimeout(timeout);timeout = setTimeout(later, delay);if (callNow) fn.apply(context, args);};}/*** 节流* @param {[type]} func [执行的函数]* @param {[type]} delay [多少秒之内执行一次]* @return {[type]} [description]*/throttle(func, delay) {var prev = Date.now();return function() {var context = this;var args = arguments;var now = Date.now();if (now - prev >= delay) {func.apply(context, args);prev = Date.now();}}}/*** 圆形碰撞* @param {[type]} circle1 [description]* @param {[type]} circle2 [description]* @return {[type]} [description]*/circleImpact(circle1, circle2) {var r1 = circle1.offsetWidth / 2;var l1 = circle1.offsetLeft;var t1 = circle1.offsetTop;var r2 = circle2.offsetWidth / 2;var l2 = circle2.offsetLeft;var t2 = circle2.offsetTop;var a = (l1 + r1) - (l2 + r2);var b = (t1 + r1) - (t2 + r2);var c = Math.sqrt(a * a + b * b);if (c >= (r1 + r2)) {return false;} else {return true;}}/*** 矩形碰撞* @param {[type]} rect1 [description]* @param {[type]} rect2 [description]* @return {[type]} [description]*/rectImpact(rect1, rect2) {var t1 = rect1.offsetTop;var l1 = rect1.offsetLeft;var r1 = rect1.offsetLeft + rect1.offsetWidth;var b1 = rect1.offsetTop + rect1.offsetHeight;var t2 = rect2.offsetTop;var l2 = rect2.offsetLeft;var r2 = rect2.offsetLeft + rect2.offsetWidth;var b2 = rect2.offsetTop + rect2.offsetHeight;if (b1 < t2 || l1 > r2 || t1 > b2 || r1 < l2) { // 表示没碰上 return false} else {return true}}/*** 图片压缩* @param {[type]} file [压缩文件]* @param {[type]} obj [压缩参数]* @param {Function} cb [回调函数]* @return {[type]} [返回压缩前和压缩后的格式]*/photoCompress(file, obj, cb) {/*obj = {width: 图片宽,height: 图片高,quality: 图像质量，blob: 是否转换成Blob}*///将以base64的图片url数据转换为Blobfunction convertBase64UrlToBlob(urlData) {var arr = urlData.split(','),mime = arr[0].match(/:(.*?);/)[1],bstr = atob(arr[1]),n = bstr.length,u8arr = new Uint8Array(n);while (n--) {u8arr[n] = bstr.charCodeAt(n);}return new Blob([u8arr], {type: mime});}// canvas 绘制图片function canvasDataURL(oldBase64) {var img = new Image();img.src = oldBase64;img.onload = function() {var that = this;// 默认按比例压缩var w = that.width,h = that.height,scale = w / h;w = obj.width || w;h = obj.height || (w / scale);var quality = 0.7; // 默认图片质量为0.7//生成canvasvar canvas = document.createElement('canvas');var ctx = canvas.getContext('2d');// 创建属性节点var anw = document.createAttribute("width");anw.nodeValue = w;var anh = document.createAttribute("height");anh.nodeValue = h;canvas.setAttributeNode(anw);canvas.setAttributeNode(anh);ctx.drawImage(that, 0, 0, w, h);// 图像质量if (obj.quality && obj.quality <= 1 && obj.quality > 0) {quality = obj.quality;}// quality值越小，所绘制出的图像越模糊var base64 = canvas.toDataURL('image/jpeg', quality);// 回调函数返回base64的值if (obj.blob) {cb && cb(convertBase64UrlToBlob(base64), convertBase64UrlToBlob(oldBase64))} else {cb && cb(base64, oldBase64);}}}// 读取图片的base64格式var ready = new FileReader();ready.readAsDataURL(file);ready.onload = function() {var re = this.result;canvasDataURL(re)}}/*获取网址参数*/getUrlParams(name) {var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");var r = decodeURI(window.location.search).substr(1).match(reg);if (r != null) return r[2];return null;}/*获取全部url参数,并转换成json对象*/getUrlAllParams(url) {var url = url ? url : window.location.href;var _pa = url.substring(url.indexOf('?') + 1),_arrS = _pa.split('&'),_rs = {};for (var i = 0, _len = _arrS.length; i < _len; i++) {var pos = _arrS[i].indexOf('=');if (pos == -1) {continue;}var name = _arrS[i].substring(0, pos),value = window.decodeURIComponent(_arrS[i].substring(pos + 1));_rs[name] = value;}return _rs;}/*删除url指定参数，返回url*/delParamsUrl(url, name) {var baseUrl = url.split('?')[0] + '?';var query = url.split('?')[1];if (query.indexOf(name) > -1) {var obj = {}var arr = query.split("&");for (var i = 0; i < arr.length; i++) {arr[i] = arr[i].split("=");obj[arr[i][0]] = arr[i][1];};delete obj[name];var url = baseUrl + JSON.stringify(obj).replace(/[\"\{\}]/g, "").replace(/\:/g, "=").replace(/\,/g, "&");return url} else {return url;}}/*获取十六进制随机颜色*/getRandomColor() {return '#' + (function(h) {return new Array(7 - h.length).join("0") + h;})((Math.random() * 0x1000000 << 0).toString(16));}/*图片加载*/imgLoadAll(arr, callback) {var arrImg = [];for (var i = 0; i < arr.length; i++) {var img = new Image();img.src = arr[i];img.onload = function() {arrImg.push(this);if (arrImg.length == arr.length) {callback && callback();}}}}/*音频加载*/loadAudio(src, callback) {var audio = new Audio(src);audio.onloadedmetadata = callback;audio.src = src;}/*DOM转字符串*/domToStirng(htmlDOM) {var div = document.createElement("div");div.appendChild(htmlDOM);return div.innerHTML}/*字符串转DOM*/stringToDom(htmlString) {var div = document.createElement("div");div.innerHTML = htmlString;return div.children[0];}/*** 光标所在位置插入字符，并设置光标位置* * @param {dom} 输入框* @param {val} 插入的值* @param {posLen} 光标位置处在 插入的值的哪个位置*/setCursorPosition(dom, val, posLen) {var cursorPosition = 0;if (dom.selectionStart) {cursorPosition = dom.selectionStart;}this.insertAtCursor(dom, val);dom.focus();console.log(posLen)dom.setSelectionRange(dom.value.length, cursorPosition + (posLen || val.length));}/*光标所在位置插入字符*/insertAtCursor(dom, val) {if (document.selection) {dom.focus();sel = document.selection.createRange();sel.text = val;sel.select();} else if (dom.selectionStart || dom.selectionStart == '0') {let startPos = dom.selectionStart;let endPos = dom.selectionEnd;let restoreTop = dom.scrollTop;dom.value = dom.value.substring(0, startPos) + val + dom.value.substring(endPos, dom.value.length);if (restoreTop > 0) {dom.scrollTop = restoreTop;}dom.focus();dom.selectionStart = startPos + val.length;dom.selectionEnd = startPos + val.length;} else {dom.value += val;dom.focus();}}
}
源码下载
https://gitee.com/KT1205529635/web_utils-master
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