js+css实现图像预览与上传按钮提示代码-html代码-BFW代码库

js+css实现图像预览与上传按钮提示代码

代码语言：html

所属分类：上传

代码描述：js+css实现图像预览与上传按钮提示代码

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!DOCTYPE html>
<html lang="en" >

<head>
  <meta charset="UTF-8">


  
  
<style>
:root {
  --primary: color-mix(in srgb, red 20%, blueviolet);
}

body {
  background-color: #f5f5f5;
  height: 100vh;
  display: grid;
  place-items: center;
}

input {
  opacity: 0;
  width: 0px;
}

img {  
  max-width: 250px;
  border-radius: 999px;
  outline: 2px solid var(--primary);
  cursor: pointer;
  transition: 200ms ease-in-out;
  
/* prevents uploaded image from distortion: */
  aspect-ratio: 1;
  object-fit: cover;
}

img:hover {
  outline: 8px solid var(--primary);
}

#snackbar {
  visibility: hidden; 
  min-width: 100px; 
  margin-left: -125px; 
  background-color: var(--primary); 
  color: whitesmoke; 
  text-align: center; 
  border-radius: 8px;
  padding: 12px;
  position: fixed; 
  z-index: 1; 
  right: 5%;
  top: 30px;
}

#snackbar.show {
  visibility: visible; 
  -webkit-animation: fadein 0.5s, fadeout 0.5s 2.5s;
  animation: fadein 0.5s, fadeout 0.5s 2.5s;
}

@keyframes fadein {
  from {top: 0; opacity: 0;}
  to {top: 30px; opacity: 1;}
}

@keyframes fadeout {
  from {top: .........完整代码请登录后点击上方下载按钮下载查看