几个常用的函数

export function debounce(fn, delay = 300) { //防抖默认300毫秒
    let timer;
    return function () {
      var args = arguments;
      if (timer) {
        clearTimeout(timer);
      }
      timer = setTimeout(() => {
        fn.apply(this, args); // this 指向vue
      }, delay);
    };
  }
 
 
  //节流throttle代码（时间戳+定时器）：
  export function throttle(func, delay = 300) {//默认300毫秒
    let timer = null;
    let startTime = Date.now();
    return function () {
      let curTime = Date.now();
      let remaining = delay - (curTime - startTime);
      let context = this;
      let args = arguments;
      clearTimeout(timer);
      if (remaining <= 0) {
        func.apply(context, args);
        startTime = Date.now();
      } else {
        timer = setTimeout(func, remaining);
      }
    }
  }
 
 
 // 去除 富文本其他的标签 
  export function filterHtml(str) {
    if (str) {
      return str.replace(/<[^<>]+>/g, "").replace(/ /gi, "")
    }
  }
 
 
  // 时间转成时间戳
export function timeTotimestamp(time) {
  if (time) {
    var date = new Date(time);
    var date = new Date(time.replace(/-/g, '/'));
    // var time1 = Date.parse(date)/1000; //会精确到秒
    var time1 = Date.parse(date); //会精确到毫秒
    return time1;
  }
}
 
 
// 时间戳转成日期
export function timestampToDate(timestamp) {
  if (!timestamp || timestamp == null) {
    return '';
  } else {
    var date = new Date(timestamp);//时间戳为10位需*1000，时间戳为13位的话不需乘1000
    var Y = date.getFullYear() + '/';
    var M = (date.getMonth() + 1 < 10 ? '0' + (date.getMonth() + 1) : date.getMonth() + 1) + '/';
    var D = (date.getDate() < 10 ? '0' + date.getDate() : date.getDate()) + ' ';
    return Y + M + D;
  }
}
 
 
// 时间戳转成时间
export function unixTimeToDateTime(unixtime) {
  if (!unixtime) {
    return ''
  }
  let y, m, d
  var now = new Date(unixtime * 1); // 依情况进行更改 * 1
  y = now.getFullYear();
  m = now.getMonth() + 1;
  d = now.getDate();
  return (
    y +
    "-" +
    (m < 10 ? "0" + m : m) +
    "-" +
    (d < 10 ? "0" + d : d) +
    " " +
    now.toTimeString().substr(0, 8)
  );
}
 
 
export function validEmail(email) {
    const reg = /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/
    return reg.test(email)
  }
 
 
// 手机号验证
export function isvalidPhone(str) {
    const reg = /^1[3|4|5|7|8][0-9]\d{8}$/
    return reg.test(str)
}