三元运算
2024年12月9日小于 1 分钟
学习 三元运算 用法
let num = 18 < 19 ? 'ok' : 'no'
console.log(num)完整网页
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<input class="age" type="text" name="age" placeholder="请输入年龄">
<button class="btn">提交</button>
<div class="result"></div>
<script>
const age = document.querySelector('.age')
const btn = document.querySelector('.btn')
const result = document.querySelector('.result')
btn.addEventListener('click',() => {
let num = 18 < age.value.trim() ? 'ok' : 'no'
console.log(num)
})
</script>
</body>
</html>