JavaScript 程序检查给定年份是否为闰年
javascriptfront end technologyobject oriented programming
使用 JavaScript 检查给定年份是否为闰年，代码如下 −
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 {
font-size: 18px;
font-weight: 500;
color: blueviolet;
}
</style>
</head>
<body>
<h1>Check Leap year or not</h1>
Enter the year<input class="year" type="text" />
<button class="Btn">CHECK</button>
<div class="result"></div>
<h3>Click on the above button check if the year above is leap year or not</h3>
<script>
let resultEle = document.querySelector(".result");
let yearEle = document.querySelector(".year");
document.querySelector(".Btn").addEventListener("click", () => {
if (yearEle.value % 4 == 0) {
resultEle.innerHTML = yearEle.value + " is a leap year ";
} else resultEle.innerHTML = yearEle.value + " is not a leap year";
});
</script>
</body>
</html>
输出
输入年份并点击‘检查’按钮 −
