raw-javascript-mini-projects/Compare-WifeAge.html at main · lingkon-record/raw-javascript-mini-projects · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Age and Marriage Duration Calculator</title>
  <style>
    body {
      font-family: Arial, sans-serif;
      text-align: center;
    }
    input {
      margin-bottom: 10px;
    }
  </style>
</head>
<body>
  <h1>Age and Marriage Duration Calculator</h1>
  <label for="myDob">Your Date of Birth:</label><br>
  <input type="date" id="myDob"><br>
  <label for="wifeDob">Wife's Date of Birth:</label><br>
  <input type="date" id="wifeDob"><br>
  <label for="marriageDate">Marriage Date:</label><br>
  <input type="date" id="marriageDate"><br>
  <button onclick="calculate()">Calculate</button><br>
  <div id="result"></div>

  <script>
    function calculate() {
      var myDob = new Date(document.getElementById("myDob").value);
      var wifeDob = new Date(document.getElementById("wifeDob").value);
      var marriageDate = new Date(document.getElementById("marriageDate").value);

      var today = new Date();

      var myAge = calculateAge(myDob, today);
      var wifeAge = calculateAge(wifeDob, today);

      var ageDifference = calculateAgeDifference(myDob, wifeDob);

      var marriageDuration = calculateDuration(marriageDate, today);

      var resultDiv = document.getElementById("result");
      resultDiv.innerHTML = "Your age: " + myAge + "<br>";
      resultDiv.innerHTML += "Wife's age: " + wifeAge + "<br>";
      resultDiv.innerHTML += "Age difference: " + ageDifference + "<br>";
      resultDiv.innerHTML += "Marriage duration: " + marriageDuration;
    }

    function calculateAge(birthDate, endDate) {
      var yearsDiff = endDate.getFullYear() - birthDate.getFullYear();
      var monthsDiff = endDate.getMonth() - birthDate.getMonth();
      var daysDiff = endDate.getDate() - birthDate.getDate();

      if (monthsDiff < 0 || (monthsDiff === 0 && daysDiff < 0)) {
        yearsDiff--;
        monthsDiff += (monthsDiff < 0 ? 12 : 0);
      }

      if (daysDiff < 0) {
        var tempDate = new Date(endDate.getFullYear(), endDate.getMonth() - 1, birthDate.getDate());
        var daysInMonth = new Date(tempDate.getFullYear(), tempDate.getMonth() + 1, 0).getDate();
        daysDiff += daysInMonth;
        monthsDiff--;
      }

      return yearsDiff + " years, " + monthsDiff + " months, " + daysDiff + " days";
    }

    function calculateAgeDifference(date1, date2) {
      var years1 = date2.getFullYear() - date1.getFullYear();
      var months1 = date2.getMonth() - date1.getMonth();
      var days1 = date2.getDate() - date1.getDate();

      if (months1 < 0 || (months1 === 0 && days1 < 0)) {
        years1--;
        months1 += (months1 < 0 ? 12 : 0);
      }

      if (days1 < 0) {
        var tempDate = new Date(date2.getFullYear(), date2.getMonth() - 1, date1.getDate());
        var daysInMonth = new Date(tempDate.getFullYear(), tempDate.getMonth() + 1, 0).getDate();
        days1 += daysInMonth;
        months1--;
      }

      if (years1 > 0) {
        return years1 + " years, " + months1 + " months, " + days1 + " days older";
      } else {
        return "Same age";
      }
    }

    function calculateDuration(startDate, endDate) {
      var yearsDiff = endDate.getFullYear() - startDate.getFullYear();
      var monthsDiff = endDate.getMonth() - startDate.getMonth();
      var daysDiff = endDate.getDate() - startDate.getDate();

      if (monthsDiff < 0 || (monthsDiff === 0 && daysDiff < 0)) {
        yearsDiff--;
        monthsDiff += (monthsDiff < 0 ? 12 : 0);
      }

      if (daysDiff < 0) {
        var tempDate = new Date(endDate.getFullYear(), endDate.getMonth() - 1, startDate.getDate());
        var daysInMonth = new Date(tempDate.getFullYear(), tempDate.getMonth() + 1, 0).getDate();
        daysDiff += daysInMonth;
        monthsDiff--;
      }

      return yearsDiff + " years, " + monthsDiff + " months, " + daysDiff + " days";
    }
  </script>
</body>
</html>