JavaScript 时间格式化

JavaScript 时间格式化

/**
 * @param {date} 标准时间格式:Fri Nov 17 2017 09:26:23 GMT+0800 (标准时间)
 * @param {type} 类型
 *   type == 1 ---> "yyyy-mm-dd hh:MM:ss.fff"
 *   type == 2 ---> "yyyymmddhhMMss"
 *   type == '' ---> "yyyy-mm-dd hh:MM:ss"
 *   zone ---> 时区，与世界标准时间的时差，
 */
export const formatDate = (datef, type, zone = 0) => {
  let date = datef
  if (zone) {
    const localTime = date.getTime();
    const localOffset = date.getTimezoneOffset()*60000; //获得当地时间偏移的毫秒数
    const utc = localTime + localOffset; //utc即GMT时间
    const hawaii = utc + (3600000*zone) + 60 * 60 * 1000;
    date = new Date(hawaii); 
  }
  var year = date.getFullYear(); //年
  var month =
    date.getMonth() + 1 < 10
      ? "0" + (date.getMonth() + 1)
      : date.getMonth() + 1; //月
  var day = date.getDate() < 10 ? "0" + date.getDate() : date.getDate(); //日
  var hour = date.getHours() < 10 ? "0" + date.getHours() : date.getHours(); //时
  var minutes =
    date.getMinutes() < 10 ? "0" + date.getMinutes() : date.getMinutes(); //分
  var seconds =
    date.getSeconds() < 10 ? "0" + date.getSeconds() : date.getSeconds(); //秒
  var milliseconds =
    date.getMilliseconds() < 10
      ? "0" + date.getMilliseconds()
      : date.getMilliseconds(); //毫秒
  if (type == 1) {
    return (
      year +
      "-" +
      month +
      "-" +
      day +
      " " +
      hour +
      ":" +
      minutes +
      ":" +
      seconds +
      "." +
      milliseconds
    );
  } else if (type == 2) {
    return (
      year + "" + month + "" + day + "" + hour + "" + minutes + "" + seconds
    );
  } else if (type == 3) {
    return year + "-" + month + "-" + day;
  } else {
    return (
      year +
      "-" +
      month +
      "-" +
      day +
      " " +
      hour +
      ":" +
      minutes +
      ":" +
      seconds
    );
  }
}