时间转换格式

最新推荐文章于 2024-11-03 12:01:05 发布

原创最新推荐文章于 2024-11-03 12:01:05 发布 · 146 阅读

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#前端

该文章提供两个JavaScript函数，parseTime和formatTime，用于处理和格式化时间。parseTime函数将不同格式的时间转换为指定格式的字符串，而formatTime函数则根据时间差返回人性化的时间描述，如刚刚，几分钟前等。

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export function parseTime(time, cFormat) {
  if (arguments.length === 0 || !time) {
    return null;
  }
  const format = cFormat || "{y}-{m}-{d} {h}:{i}:{s}";
  let date;
  if (typeof time === "object") {
    date = time;
  } else {
    if (typeof time === "string") {
      if (/^[0-9]+$/.test(time)) {
        // support "1548221490638"
        time = parseInt(time);
      } else {
        // support safari
        // https://stackoverflow.com/questions/4310953/invalid-date-in-safari
        time = time.replace(new RegExp(/-/gm), "/");
      }
    }

    if (typeof time === "number" && time.toString().length === 10) {
      time = time * 1000;
    }
    date = new Date(time);
  }
  const formatObj = {
    y: date.getFullYear(),
    m: date.getMonth() + 1,
    d: date.getDate(),
    h: date.getHours(),
    i: date.getMinutes(),
    s: date.getSeconds(),
    a: date.getDay(),
  };
  const time_str = format.replace(/{([ymdhisa])+}/g, (result, key) => {
    const value = formatObj[key];
    // Note: getDay() returns 0 on Sunday
    if (key === "a") {
      return ["日", "一", "二", "三", "四", "五", "六"][value];
    }
    return value.toString().padStart(2, "0");
  });
  return time_str;
}

/**
 * @param {number} time
 * @param {string} option
 * @returns {string}
 */
export function formatTime(time, option) {
  if (("" + time).length === 10) {
    time = parseInt(time) * 1000;
  } else {
    time = +time;
  }
  const d = new Date(time);
  const now = Date.now();

  const diff = (now - d) / 1000;

  if (diff < 30) {
    return "刚刚";
  } else if (diff < 3600) {
    // less 1 hour
    return Math.ceil(diff / 60) + "分钟前";
  } else if (diff < 3600 * 24) {
    return Math.ceil(diff / 3600) + "小时前";
  } else if (diff < 3600 * 24 * 2) {
    return "1天前";
  }
  if (option) {
    return parseTime(time, option);
  } else {
    return (
      d.getMonth() +
      1 +
      "月" +
      d.getDate() +
      "日" +
      d.getHours() +
      "时" +
      d.getMinutes() +
      "分"
    );
  }
}