前端常用辅助函数工具

1. 去重

export const uiqueArray = (array, key="id") => {
    if(!array||array.length<1){
      return null
    }
    var result =  [array[0]];
    for(var i = 1; i < array.length; i++){
      var item = array[i];
      var repeat = false;
      for (var j = 0; j < result.length; j++) {
        if (item[key] == result[j][key]) {
          repeat = true;
          break;
        }
      }
      if (!repeat) {
        result.push(item);
      }
    }
    return result;
  }

2. 设置cookie

export const setCookie = (name, value, time=60) => {
  let date = new Date();
  date.setTime(date.getTime() + time*60*1000); // 默认date为当前时间+60分
  document.cookie = name + "=" + escape(value) + ";expires=" + date.toGMTString();
}

3. 获取cookie

export const getCookie = (name) => {
  var arr,reg = new RegExp("(^| )" + name + "=([^;]*)(;|$)");
  if (arr = document.cookie.match(reg)) {
    return unescape(arr[2]);
  } else {
    return null;
  }
}

4. 获取url中的参数

export const getParam = (param) => {
  let query = window.location.search.substring(1).split('&');
  for (let i = 0; i < query.length; i++) {
    let kv = query[i].split('=');
    if (kv[0] === param) {
      return kv[1];
    }
  }
  return null;
}

5. 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)
}

6. 手机号码验证

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

7. 判断是否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;
}

8. 判断是否移动端

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

9. 判断el是否在视野范围内

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;
}

10. 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
    let 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: "*", 61: "陕西", 62: "甘肃", 63: "青海", 64: "宁夏", 65: "*", 71: "*", 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
    let 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
    let 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;
}

11. 数字转换成大写金额

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;
}

12. 最大值

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

13. 最小值

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

14. 函数节流器

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

15. 比较两个对象是否相等

export const compare = (origin: any, target: any) => {
  if (typeof target !== "object") {
    //target不是对象/数组
    return origin === target; //直接返回全等的比较结果
  }

  if (typeof origin !== "object") {
    //origin不是对象/数组
    return false; //直接返回false
  }
  for (let key of Object.keys(target)) {
    // 非 null 排除  为null 比较不出 null 和 undefined
    if(origin[key]!==null&&target[key]!==null){
      //遍历target的所有自身属性的key
      if (!compare(origin[key], target[key])||origin[key].length!==target[key].length) {
        //递归比较key对应的value，
        //value不等，则两对象不等，结束循环，退出函数，返回false
        return false;
      }
    }
  }
  //遍历结束，所有value都深度比较相等，则两对象相等
  return true;
}

16. 加url参数

export const appendUrlParam = (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
    }
    return url;
}

本文地址：https://blog.csdn.net/weixin_43990566/article/details/107379009