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js+html实现周岁年龄计算器

人气:0

输入界面展示:

输出结果展示:

实现代码:

<!DOCTYPE html>
<html>
 <head>
 <meta charset="utf-8">
 <title></title>
 </head>
 <body>
 <div>
 <!-- 设计输入及点击界面 -->
 <p>请输入您的出生日期(yyy/mm/dd):</p>
 <input type="text" style="width: 60px;" id="year">/
 <input type="text" style="width: 60px;" id="month">/
 <input type="text" style="width: 60px;" id="day"></br>
 <!-- 运用button标签并设置点击事件函数 -->
 <button style="margin-top:10px " onclick="getAge()">计算</button>
 </div>
 
 <script>
 //计算周岁年龄的函数
 function getAge() {
 //定义返回值
 var returnAge
 
 //获取输入框参数
 var birthYear = document.getElementById("year").value
 var birthMonth = document.getElementById("month").value
 var birthDay = document.getElementById("day").value
 
 //获取当前时间
 d = new Date();
 var nowYear = d.getFullYear()
 var nowMonth = d.getMonth() + 1
 var nowDay = d.getDate()
 
 //计算周岁年龄差
 if (nowYear == birthYear) {
 returnAge = 0; //同年 则为0岁
 } else {
 var ageDiff = nowYear - birthYear //年之差
 if (ageDiff > 0) {
 if (nowMonth == birthMonth) {
 var dayDiff = nowDay - birthDay //日之差
 if (dayDiff < 0) {
 returnAge = ageDiff - 1
 } else {
 returnAge = ageDiff
 }
 } else {
 var monthDiff = nowMonth - birthMonth //月之差
 if (monthDiff < 0) {
 returnAge = ageDiff - 1
 } else {
 returnAge = ageDiff
 }
 }
 } else {
 returnAge = -1 //输入有误
 }
 
 }
 alert(returnAge)//结果弹窗显示
 }
 </script>
 </body>
</html>
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