原生js实现一个计算器-html代码-BFW代码库

原生js实现一个计算器

代码语言：html

代码描述：原生js实现一个计算器

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">

  
  
  <link rel='stylesheet' href='https://fonts.googleapis.com/css2?family=Open+Sans:wght@600&amp;family=Press+Start+2P&amp;display=swap'>
  
<style>
html {
  width: 100%;
  height: 100%;
  padding: 0;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

body {
  padding: 0;
  margin: 0;
  background-image: linear-gradient(to right, #bdc3c7 0%, #ecf0f1 40%, #ecf0f1 60%, #bdc3c7 100%);
}

.calculator {
  width: 250px;
  background-color: #2c3e50;
  background-image: linear-gradient(to right, #334b63 0%, #4b6580 40%, #4b6580 60%, #334b63 100%);
  border-width: 1px;
  border-style: solid;
  border-top-color: rgba(255, 255, 255, 0.6);
  border-bottom-color: black;
  border-right-color: black;
  border-left-color: black;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.4), inset 0 0 3px 4px rgba(0, 0, 0, 0.5);
  border-top: 4px solid rgba(255, 255, 255, 0.2);
}

/* Screen
-------------------------------*/
.screen-wrapper {
  margin: 15px;
  padding: 3px;
  background-color: rgba(0, 0, 0, 0.3);
  box-shadow: 0 2px 2px rgba(255, 255, 255, 0.5);
  border-radius: 5px;
}

#screen {
  height: 60px;
  background-image: linear-gradient(to bottom, #ffcc00 0%, #ffde74 100%);
  border-radius: 30%/7%;
  box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.6);
  padding: 8px 5px;
}

#expression {
  font-family: 'Press Start 2P', cursive;
  font-size: 12px;
  height: 20px;
  line-height: 20px;
  overflow: hidden;
  white-space: nowrap;
  display: flex;
  align-items: center;
}

#result {
  font-family: 'Press Start 2P', cursive;
  font-size: 28px;
  text-align: right;
  margin-top: 10px;
  white-space: nowrap;
}

#typed-cursor {
  border-right: 3px solid black;
  height: 14px;
  animation: 1s blink step-end infinite;
}

@keyframes blink {
  from, to {
    border-color: transparent;
  }
  50% {
    border-color: black;
  }
}
.keys {
  width: 100%;
  border-spacing: 12px;
}

.key {
  width: 25%;
  cursor: pointer;
  font-family: 'Open Sans', .........完整代码请登录后点击上方下载按钮下载查看