JS 前端常用工具函数

[ytanck]

JS 前端常用工具方法

很实用的工具方法哦，建议收藏！:stuck_out_tongue_winking_eye:

邮箱验证

export const isEmail = (s) => {
  return /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+((.[a-zA-Z0-9_-]{2,3}){1,2})$/.test(
    s
  );
};

手机号码

export const isMobile = (s) => {
  return /^1[0-9]{10}$/.test(s);
};

电话号码

export const isPhone = (s) => {
  return /^([0-9]{3,4}-)?[0-9]{7,8}$/.test(s);
};

是否 url 地址

export const isURL = (s) => {
  return /^http[s]?:\/\/.*/.test(s);
};

是否字符串

export const isString = (o) => {
  return Object.prototype.toString.call(o).slice(8, -1) === "String";
};

数据类型检测

Object.prototype.toString
  .call(data)
  .replace(/\[object (\w+)\]/, "$1")
  .toLowerCase();

打乱数组

const shuffleArray = (arr) => arr.sort(() => 0.5 - Math.random());

是否函数

export const isFunction = (o) => {
  return Object.prototype.toString.call(o).slice(8, -1) === "Function";
};

是否错误对象

export const isError = (o) => {
  return Object.prototype.toString.call(o).slice(8, -1) === "Error";
};

是否是微信浏览器

export const isWeiXin = () => {
  return ua.match(/microMessenger/i) == "micromessenger";
};

是否是移动端

export const isDeviceMobile = () => {
  return /android|webos|iphone|ipod|balckberry/i.test(ua);
};

是否是 QQ 浏览器

export const isQQBrowser = () => {
  return !!ua.match(/mqqbrowser|qzone|qqbrowser|qbwebviewtype/i);
};

是否是爬虫

export const isSpider = () => {
  return /adsbot|googlebot|bingbot|msnbot|yandexbot|baidubot|robot|careerbot|seznambot|bot|baiduspider|jikespider|symantecspider|scannerlwebcrawler|crawler|360spider|sosospider|sogou web sprider|sogou orion spider/.test(
    ua
  );
};

是否 ios

export const isIos = () => {
  var u = navigator.userAgent;
  if (u.indexOf("Android") > -1 || u.indexOf("Linux") > -1) {
    //安卓手机
    return false;
  } else if (u.indexOf("iPhone") > -1) {
    //苹果手机
    return true;
  } else if (u.indexOf("iPad") > -1) {
    //iPad
    return false;
  } else if (u.indexOf("Windows Phone") > -1) {
    //winphone手机
    return false;
  } else {
    return false;
  }
};

是否为 PC 端

export const isPC = () => {
  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;
};

去除 html 标签

export const removeHtmltag = (str) => {
  return str.replace(/<[^>]+>/g, "");
};

获取 url 参数

export const getQueryString = (name) => {
  const reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)", "i");
  const search = window.location.search.split("?")[1] || "";
  const r = search.match(reg) || [];
  return r[2];
};

动态引入 js

export const injectScript = (src) => {
  const s = document.createElement("script");
  s.type = "text/javascript";
  s.async = true;
  s.src = src;
  const t = document.getElementsByTagName("script")[0];
  t.parentNode.insertBefore(s, t);
};

el 是否包含某个 class

export const hasClass = (el, className) => {
  let reg = new RegExp("(^|\\s)" + className + "(\\s|$)");
  return reg.test(el.className);
};

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,
});

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);
  }
};
// window.scrollTo(0,0)

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;
};

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;
};

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;
  }
};

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;
};

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;
};

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;
};

数组去重

export const unique = (arr) => {
  return arr.filter((item, index, arr) => {
    return arr.indexOf(item) === index;
  });
};

求两个集合的并集

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

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;
  });
};

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;
};

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;
};

节流

//节流：单位时间内—只响应第一次
// 时间戳版
var throttle = (fn, timer = 500) => {
  let preTime = 0;
  return function () {
    var nowTime = new Date().getTime();
    if (nowTime - preTime > timer) {
      // fn.apply(this, arguments);
      fn.call(this, ...arguments);
      preTime = nowTime;
    }
  };
};
// 定时器版
function throttle(func, wait) {
  var timeout;
  return function() {
    var context = this;
    var args = arguments;
    if (!timeout) {
      timeout = setTimeout(function(){
        timeout = null;
        func.apply(context, args)
      }, wait)
    }
  }
}

防抖

//防抖：单位时间内-只响应最后一次
// 延时执行
function debounce(func, delay) {
  var timer = null;
  return function () {
    var context = this;
    var args = arguments;
    if (timer) clearTimeout(timer);
    timer = setTimeout(() => {
      func.apply(context, args);
    }, delay);
  };
}
// 立即防抖(先执行一遍)
  function debounce(func, delay) {
    var timer = null
    return function () {
      if (timer) clearTimeout(timer)
      var callNow = !timer
      timer = setTimeout(() => {
        timer = null
      }, delay)
      if (callNow) func(...arguments)
    }
  }

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;
};

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;
};

生成随机颜色

/*随机获取颜色*/
function getRandomColor() {
  var r = Math.floor(Math.random() * 256);
  var g = Math.floor(Math.random() * 256);
  var b = Math.floor(Math.random() * 256);
  return "rgb(" + r + "," + g + "," + b + ")";
  //return '#' + Math.floor(Math.random() * 0xffffff).toString(16);
}

颜色 RGB 转 16 进制

const rgbToHex = (r, g, b) =>
  "#" + ((1 << 24) + (r << 16) + (g << 8) + b).toString(16).slice(1);

rgbToHex(0, 51, 255);
// Result: #0033ff

计算 2 个日期之间相差多少天

const dayDif = (date1, date2) =>
  Math.ceil(Math.abs(date1.getTime() - date2.getTime()) / 86400000);

dayDif(new Date("2020-10-21"), new Date("2021-10-22"));
// Result: 366

校验数组是否为空

const isNotEmpty = (arr) => Array.isArray(arr) && arr.length > 0;

isNotEmpty([1, 2, 3]);
// Result: true

检验车牌号

isCarNum(val) {
              var patrn = /^([京津沪渝冀豫云辽黑湘皖鲁新苏浙赣鄂桂甘晋蒙陕吉闽贵粤青藏川宁琼使领A-Z]{1}[A-Z]{1}[A-HJ-NP-Z0-9]{4}[A-HJ-NP-Z0-9挂学警港澳]{1})$/;
              var patrn2 = /^([京津沪渝冀豫云辽黑湘皖鲁新苏浙赣鄂桂甘晋蒙陕吉闽贵粤青藏川宁琼使领A-Z]{1}[A-Z]{1}(([0-9]{5}[DF])|([DF]([A-HJ-NP-Z0-9])[0-9]{4})))$/;
              if (!patrn.test(val) && !patrn2.test(val)) {
                return false;
              } else {
                return true;
              }
            },