//防抖
export function debounce(func, delay) {
    let timer = null
    return function(...args) {
      if (timer) clearTimeout(timer)
          timer = setTimeout(() => {
          func.apply(this, args)
        },delay)
      }
  }

  export function formatDate(date, fmt) {
    if (/(y+)/.test(fmt)) {
    fmt = fmt.replace(RegExp.$1, (date.getFullYear() + '').substr(4 - RegExp.$1.length));
    }
    let o = {
    'M+': date.getMonth() + 1,
    'd+': date.getDate(),
    'h+': date.getHours(),
    'm+': date.getMinutes(),
    's+': date.getSeconds()
    };
    for (let k in o) {
    if (new RegExp(`(${k})`).test(fmt)) {
    let str = o[k] + '';
    fmt = fmt.replace(RegExp.$1, (RegExp.$1.length === 1) ? str : padLeftZero(str));
    }
    }
    return fmt;
    };
     
    
    function padLeftZero(str) {
    return ('00' + str).substr(str.length);
    }