效果 (源码网盘地址在最后)
视频演示
「编程挑战 23」输入框验证特效
视频地址一:https://www.bilibili.com/video/BV1Ak4y1k7Dm/
视频地址二:https://www.ixigua.com/i6820325547432739339/
源码
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link hre