<!DOCTYPE html>
<html leng = 'en'>
<head>
<meta charset = 'UTF-8'/>
</head>
<body>
<script>
var year = parseInt(prompt('请输入想判断的年份'));
function test(year1){
if(year1 % 4 === 0 && year1 % 400 === 0 && year1 % 100 === 0){
console.log('该年是闰年');
}
}
test(year);
</script>
</body>
</html>
js write whether the year is a leap year
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Origin blog.csdn.net/weixin_48727085/article/details/107704936
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