js根据具体年月日获得24节气

可以使用JavaScript计算公历年份的24节气。以下是一个示例代码，可以根据具体的年月日获得24节气：

function getSolarTerm(year, month, day) {
  var solarTerm = ["小寒", "大寒", "立春", "雨水", "惊蛰", "春分", "清明", "谷雨", "立夏", "小满", "芒种", "夏至", "小暑", "大暑", "立秋", "处暑", "白露", "秋分", "寒露", "霜降", "立冬", "小雪", "大雪", "冬至"];
  var sTermInfo = [
    0, 21208, 42467, 63836, 85337, 107014, 128867, 150921, 173149, 195551, 218072, 240693, 263343, 285989, 308563, 331033, 353350, 375494, 397447, 419210, 440795, 462224, 483532, 504758
  ];
  var solarTerms = [];
  for (var i = 0; i < 24; i++) {
    solarTerms[i] = new Date((31556925974.7 * (year - 1900) + sTermInfo[i] * 60000) + (new Date(Date.UTC(1900, 0, 6, 2, 5)).getTime()));
  }
  var termIndex = new Date(year, month - 1, day).getTime() - new Date(year, 0, 6, 2, 5).getTime();
  termIndex = Math.floor(termIndex / 1000 / 60 / 60 / 24 / 15);
  return solarTerm[termIndex];
}

// 示例
console.log(getSolarTerm(2021, 2, 3)); // 立春
console.log(getSolarTerm(2021, 6, 21)); // 夏至
console.log(getSolarTerm(2021, 12, 21)); // 冬至

在这个示例中，getSolarTerm()函数使用sTermInfo数组来计算每个节气的日期。然后使用termIndex计算特定日期的节气，并返回它的名称。