react结合EventEmitter实现一个简洁计算器效果代码-html代码-BFW代码库

代码语言：html

代码描述：react结合EventEmitter实现一个简洁计算器效果代码

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">
<title>React Calculator</title>
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=0"/>
<style>
    :root {
  /* color palette :: https://coolors.co/app/d63c6b-5cc8ff-efefef-292f36-d6d6d6 */
  --white: #efefef;
  --white-alpha: rgba(239, 239, 239, .64);
  --grey: #d6d6d6;
  --gray: var(--grey);
  --black: #292f36;
  --pure-black: #131313;
  --pure-black-alpha: rgba(19, 19, 19, .64);
  --pure-black-alpha-light: rgba(19, 19, 19, .24);
  --pure-black-alpha-transparent: rgba(19, 19, 19, .12);
  
  --primary: #d63c6b;
  --primary-dk: #c41c4f;
  --accent: #5cc8ff;
  --accent-dk: #00a3f5;
  
  --transition: 300ms;
  --easing: cubic-bezier(1, 1, 1, 1);
  --easing-bounce-in: cubic-bezier(0, 0, .43, 1.3);
  --easing-bounce-out: cubic-bezier(.43, 1.3, 0, 0);
  font-size: 100%;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

*,
*:before,
*:after {
  box-sizing: border-box;
}

html,
body {
  position: relative;
  
  width: 100%;
  height: 100%;
  background-image: linear-gradient(to bottom right, var(--accent) 0%, var(--primary) 100%);
  background-repeat: no-repeat;
  background-attachment: fixed;
}

body {
  padding-top: 20px;
  user-select: none;
}

button {
  outline: none;
  border: 0;
  padding: 1rem;
  background-color: var(--black);
  
  font-size: 1.25rem;
  line-height: 1;
  color: var(--accent);

  transition: all var(--transition) var(--easing);
}

button:hover {
    color: var(--accent-dk);
  }

button.block {
    width: 100%;
  }

button.transparent {
    background-color: transparent;
  }

button.no-padding {
    padding: 0;
  }

button.long-text { font-size: 1rem; }

.react-calculator {
  position: relative;
  margin: 0 auto;
  width: 320px;
  
  box-shadow: 0 19px 38px var(--pure-black-alpha-light),
    0 15px 12px var(--pure-black-alpha-transparent);
}

body::-webkit-scrollbar, .editable-field::-webkit-scrollbar, .memory-bank::-webkit-scrollbar { width: .5rem; }

body::-webkit-scrollbar:horizontal, .editable-field::-webkit-scrollbar:horizontal, .memory-bank::-webkit-scrollbar:horizontal { height: .5rem; }

body::-webkit-scrollbar-track,
  body::-webkit-scrollbar:horizontal,
  .editable-field::-webkit-scrollbar-track,
  .editable-field::-webkit-scrollbar:horizontal,
  .memory-bank::-webkit-scrollbar-track,
  .memory-bank::-webkit-scrollbar:horizontal {
    background-color: var(--pure-black);
  }

body::-webkit-scrollbar-thumb,
  body::-webkit-scrollbar:horizontal,
  .editable-field::-webkit-scrollbar-thumb,
  .editable-field::-webkit-scrollbar:horizontal,
  .memory-bank::-webkit-scrollbar-thumb,
  .memory-bank::-webkit-scrollbar:horizontal {
    background-color: var(--primary);
  }

s
  body:hover::-webkit-scrollbar-thumb,
    s
  body:hover::-webkit-scrollbar:horizontal,
    s
  .editable-field:hover::-webkit-scrollbar-thumb,
    s
  .editable-field:hover::-webkit-scrollbar:horizontal,
    s
  .memory-bank:hover::-webkit-scrollbar-thumb,
    s
  .memory-bank:hover::-webkit-scrollbar:horizontal {
      background-color: var(--primary-dk);
    }

.editable-field {
  position: relative;
  width: 320px;
  height: 80px;
  z-index: 10;
  
  outline: none;
  box-shadow: 0 4px 2px -2px var(--pure-black-alpha);
  padding: .5rem;
  overflow-y: hidden;
  overflow-x: scroll;
  
  background-color: var(--pure-black-alpha);

  font-size: 2rem;
  line-height: 2;
  color: var(--primary);
  text-align: right;
  direction: rtl;
  white-space: nowrap;
}

.memory-bank {
  position: absolute;
  top: 80px;
  left: 0;
  z-index: 10;
  
  width: 100%;
  height: 0;
  overflow: hidden;
  padding: 0;
  
  background-color: var(--pure-black-alpha);
  color: var(--accent-dk);
  
  transition: height 150ms var(--easing),
    overflow 1ms var(--easing) 200ms,
    padding 1ms var(--easing) 200ms;
}

.memory-bank .toggle-close {
    position: absolute;
    top: 5px;
    right: 5px;
    padding: 2px 5px;
  }

.memory-bank .toggle-close .title {
      display: inlin.........完整代码请登录后点击上方下载按钮下载查看