【收藏】60个前端常用的实现方法-下篇-职坐标

【收藏】60个前端常用的实现方法-下篇

小职 2021-04-28 来源：阅读 637 评论 0

摘要：本篇主要介绍了前端常用的实现方法，希望对你有所帮助。

本篇主要介绍了前端常用的实现方法，希望对你有所帮助。

【收藏】60个前端常用的实现方法-下篇

本篇是60个前端常用的实现方法-下篇，希望对你web前端的学习有所帮助。你也可以在上篇中学习其他相关内容。

31、el去除某个class

export const removeClass = (el, className) => {

if (!hasClass(el, className)) {

return

}

let reg = new RegExp('(^|\\s)' + className + '(\\s|$)', 'g')

el.className = el.className.replace(reg, ' ')

}

32、获取滚动的坐标

export const getScrollPosition = (el = window) => ({

x: el.pageXOffset !== undefined ? el.pageXOffset : el.scrollLeft,

y: el.pageYOffset !== undefined ? el.pageYOffset : el.scrollTop

});

33、滚动到顶部

export const scrollToTop = () => {

const c = document.documentElement.scrollTop || document.body.scrollTop;

if (c > 0) {

window.requestAnimationFrame(scrollToTop);

window.scrollTo(0, c - c / 8);

}

34、el是否在视口范围内

export const elementIsVisibleInViewport = (el, partiallyVisible = false) => { const { top, left, bottom, right } = el.getBoundingClientRect(); const { innerHeight, innerWidth } = window; return partiallyVisible ? ((top > 0 && top < innerHeight) || (bottom > 0 && bottom < innerHeight)) && ((left > 0 && left < innerWidth) || (right > 0 && right < innerWidth)) : top >= 0 && left >= 0 && bottom <= innerHeight && right <= innerWidth;}

35、洗牌算法随机

export const shuffle = (arr) => { var result = [], random; while (arr.length > 0) { random = Math.floor(Math.random() * arr.length); result.push(arr[random]) arr.splice(random, 1) } return result;}

36、劫持粘贴板

export const copyTextToClipboard = (value) => { var textArea = document.createElement("textarea"); textArea.style.background = 'transparent'; textArea.value = value; document.body.appendChild(textArea); textArea.select(); try { var successful = document.execCommand('copy'); } catch (err) { console.log('Oops, unable to copy'); } document.body.removeChild(textArea);}

37、判断类型集合

export const checkStr = (str, type) => { switch (type) { case 'phone': //手机号码 return /^1[3|4|5|6|7|8|9][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})?$/.test(str); case 'URL': //网址 return /(http|ftp|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&:/~\+#]*[\w\-\@?^=%&/~\+#])?/.test(str) case 'IP': //IP return /((?:(?:25[0-5]|2[0-4]\\d|[01]?\\d?\\d)\\.){3}(?:25[0-5]|2[0-4]\\d|[01]?\\d?\\d))/.test(str); case 'date': //日期时间 return /^(\d{4})\-(\d{2})\-(\d{2}) (\d{2})(?:\:\d{2}|:(\d{2}):(\d{2}))$/.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; }}

38、严格的身份证校验

export const isCardID = (sId) => { if (!/(^\d{15}$)|(^\d{17}(\d|X|x)$)/.test(sId)) { console.log('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))]) { console.log('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())) { console.log('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) { console.log('你输入的身份证号非法') return false } return true}

39、随机数范围

export const random = (min, max) => { if (arguments.length === 2) { return Math.floor(min + Math.random() * ((max + 1) - min)) } else { return null; }}

40、将阿拉伯数字翻译成中文的大写数字

export const 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;}

41、将数字转换为大写金额

export const 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;}

42、判断一个元素是否在数组中

export const contains = (arr, val) => { return arr.indexOf(val) != -1 ? true : false;}

43、数组排序，{type} 1：从小到大 2：从大到小 3：随机

export const sort = (arr, type = 1) => { 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; } })}

44、去重

export const 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; }}

45、求两个集合的并集

export const union = (a, b) => { var newArr = a.concat(b); return this.unique(newArr);}

46、求两个集合的交集

export const intersect = (a, b) => { var _this = this; a = this.unique(a); return this.map(a, function (o) { return _this.contains(b, o) ? o : null; });}

47、删除其中一个元素

export const remove = (arr, ele) => { var index = arr.indexOf(ele); if (index > -1) { arr.splice(index, 1); } return arr;}

48、将类数组转换为数组

export const formArray = (ary) => { var arr = []; if (Array.isArray(ary)) { arr = ary; } else { arr = Array.prototype.slice.call(ary); }; return arr;}

49、最大值

export const max = (arr) => { return Math.max.apply(null, arr);}

50、最小值

export const min = (arr) => { return Math.min.apply(null, arr);}

51、求和

export const sum = (arr) => { return arr.reduce((pre, cur) => { return pre + cur })}

52、平均值

export const average = (arr) => { return this.sum(arr) / arr.length}

53、去除空格,type: 1-所有空格 2-前后空格 3-前空格 4-后空格

export const trim = (str, type) => { type = type || 1 switch (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; }}

54、字符转换，type: 1:首字母大写 2：首字母小写 3：大小写转换 4：全部大写 5：全部小写

export const changeCase = (str, type) => { type = type || 4 switch (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; }}

55、检测密码强度

export const 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;}

56、函数节流器

export const debouncer = (fn, time, interval = 200) => { if (time - (window.debounceTimestamp || 0) > interval) { fn && fn(); window.debounceTimestamp = time; }}

57、在字符串中插入新字符串

export const insertStr = (soure, index, newStr) => { var str = soure.slice(0, index) + newStr + soure.slice(index); return str;}

58、判断两个对象是否键值相同

export const isObjectEqual = (a, b) => { var aProps = Object.getOwnPropertyNames(a); var bProps = Object.getOwnPropertyNames(b); if (aProps.length !== bProps.length) { return false; } for (var i = 0; i < aProps.length; i++) { var propName = aProps[i]; if (a[propName] !== b[propName]) { return false; } } return true;}

59、16进制颜色转RGBRGBA字符串

export const colorToRGB = (val, opa) => { var pattern = /^(#?)[a-fA-F0-9]{6}$/; //16进制颜色值校验规则 var isOpa = typeof opa == 'number'; //判断是否有设置不透明度 if (!pattern.test(val)) { //如果值不符合规则返回空字符 return ''; } var v = val.replace(/#/, ''); //如果有#号先去除#号 var rgbArr = []; var rgbStr = ''; for (var i = 0; i < 3; i++) { var item = v.substring(i * 2, i * 2 + 2); var num = parseInt(item, 16); rgbArr.push(num); } rgbStr = rgbArr.join(); rgbStr = 'rgb' + (isOpa ? 'a' : '') + '(' + rgbStr + (isOpa ? ',' + opa : '') + ')'; return rgbStr;}

60、追加url参数

export const appendQuery = (url, key, value) => {

var options = key;

if (typeof options == 'string') {

options = {};

options[key] = value;

}

options = $.param(options);

if (url.includes('?')) {

url += '&' + options

} else {

url += '?' + options