姚姚的大布袋Y.1|JS公共方法集锦（不间断更新...）

姚姚的大布袋, 丢丢丢×1❤❤❤

在各种项目的开发，有许多公共的方法是通用的，放入utils中,直接引用十分的方便！

1、(app)版本号对比

const getSum = (total, num) => total + num;

export const compareVersion = (s1, s2) => { // s1当前版本，s2需对比的版本

  let version = true;

  const a = s1.split('.').reduce(getSum);

  const b = s2.split('.').reduce(getSum);

  if (a > b) {

    version = true;

  } else {

    version = false;

  }

  return version;

};

2、获取当前平台（android、iOS）

export function getPlatform() {
  let platform = false;
  const system = window.navigator.appVersion.toLocaleLowerCase(); 
  if (system.indexOf('iphone; cpu iphone') > 0) {
    platform = true;
  }
  return platform; // ios返回true
}

3、获取链接指定参数

export function getUrlParameter(parameterName, str) {
  const reg = new RegExp(`(^|&|\\?)${parameterName}=([^&]*)(&|$)`, 'i');
  let arr;
  let arr1;
  if (str) {
    arr = str.match(reg);
    arr1 = str.match(reg);
  } else {
    arr = window.location.search.substr(1).match(reg);
    arr1 = window.location.hash.substr(2).match(reg);
  }

  if (arr) {
    return arr[2];
  } else if (arr1) {
    return arr1[2];
  }

  return null;
}

4、时间转换(解决iphone兼容问题)

export const formatDate = (time) => {
  const Time = new Date(time.replace(/-/g, '/'));
  const date = new Date(Time);
  const year = date.getFullYear();
  const month = date.getMonth() + 1;
  const day = date.getDate();
  // const hour = date.getHours();
  // const minute = date.getMinutes();

  const addO = str => (str <= 9 ? `0${str}` : str);
  // const second = date.getSeconds();
  return `${year}-${addO(month)}-${addO(day)}`;
};

5、日期区间的间隔天数

export function restTime(nowDate,date) {
  const setTime = new Date(date.replace(/-/g, '/'));
  const nowTime = new Date(nowDate.replace(/-/g, '/'));
  const restSec = setTime.getTime() - nowTime.getTime();
  const day = parseInt(Math.ceil((restSec / (60 * 60 * 24 * 1000))), 10);
  return day;
}

6、转换单位(万、亿)

export const getNumText = (num, isPre = false) => {
  const number = Math.abs(num);
  let text = number;
  if (number >= 100000000) {
    text = `${(number / 100000000).toFixed(1)}亿`;
  } else if (number < 100000000 && number >= 10000) {
    text = `${(number / 10000).toFixed(1)}万`;
  } else {
    text = number;
  }
  if (num < 0 && isPre) text = `-${text}`;
  return text;
};

7、千位数加逗号

export const formatNum(num) {
  var n = []
  num = num.toString()
  num = num.split('')
  num.map((item, index) => {
    if((index+1)%3 == 0) {
      n.push(',')
    }
    n.push(item)
  })
  return n.join('')
}

8、日期格式化

export const formatTime = date => {
  var date = new Date(date)
  const year = date.getFullYear()
  const month = ("0" + (date.getMonth() + 1)).slice(-2)
  const day = ("0" + date.getDate()).slice(-2)
  const hour = ("0" + date.getHours()).slice(-2)
  const minute = ("0" + date.getMinutes()).slice(-2)
  const second = ("0" + date.getSeconds()).slice(-2)

  return [year, month, day].map(formatNumber).join('-') + ' ' + [hour, minute, second].map(formatNumber).join(':')
}

const formatNumber = n => {
  n = n.toString()
  return n[1] ? n : '0' + n
}

9、阿拉伯数字转汉语

export const sectionToChinese = (section) => {
  var chnNumChar = ["零", "一", "二", "三", "四", "五", "六", "七", "八", "九"];
  var chnUnitChar = ["", "十", "百", "千", "万", "亿", "万亿", "亿亿"];
  var strIns = '',
    chnStr = '';
  var unitPos = 0;
  var zero = true;
  while (section > 0) {
    var v = section % 10;
    if (v === 0) {
      if (!zero) {
        zero = true;
        chnStr = chnNumChar[v] + chnStr;
      }
    } else {
      zero = false;
      strIns = chnNumChar[v];
      strIns += chnUnitChar[unitPos];
      chnStr = strIns + chnStr;
    }
    unitPos++;
    section = Math.floor(section / 10);
  }
  return chnStr;
}

未完待续...❤