如何設定 JavaScript 中日期的天？

以下是用於在 JavaScript 中設定日期天數的程式碼 -

示例

<!DOCTYPE html>
<html lang="en" >
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<style>
   body {
      font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
   }
   .result,.sample {
      font-size: 20px;
      font-weight: 500;
   }
</style>
</head>
<body>
<h1>Setting day of the date in JavaScript</h1>
<div class="sample"></div>
<div style="color: green;" class="result"></div>
<button class="Btn">CLICK HERE</button>
<h3>
Click on the above button to change the day of the above date object
</h3>
<script>
   let sampleEle = document.querySelector('.sample');
   let resEle = document.querySelector(".result");
   let dateObj = new Date();
   sampleEle.innerHTML = dateObj;
   document.querySelector(".Btn").addEventListener("click", () => {
      dateObj.setDate(28)
      resEle.innerHTML = 'Changing day of the date = <br> '+dateObj;
   });
</script>
</body>
</html>