js特效加减乘除计算器代码

1、新建html。

3、新建css文件，并添加引用。<link rel="stylesheet" type="text/css" href="css/normalize.css" /><link rel="stylesheet" href="css/style.css">

5、书写style.css。html { background: #100a1c; background-image: -webkit-radial-gradient(50% 30% ellipse at center top, #201e40 0%, rgba(0, 0, 0, 0) 100%), -webkit-radial-gradient(60% 50% ellipse at center bottom, #261226 0%, #100a1c 100%); background-image: radial-gradient(50% 30% ellipse at center top, #201e40 0%, rgba(0, 0, 0, 0) 100%), radial-gradient(60% 50% ellipse at center bottom, #261226 0%, #100a1c 100%); background-attachment: fixed; color: #6cacc5; }body { color: #6cacc5; font: 300 18px/1.6 "Source Sans Pro", sans-serif; margin: 0; /*padding: 5em 0 2em;*/text-align: center; }h2 { font-weight: 300; margin: 0; }.warning { background: -webkit-linear-gradient(45deg, #c97874 10%, #463042 90%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; color: #8c5059; font-weight: 400; margin: 0 auto 6em; max-width: 9em; }.calculator { font-size: 28px; margin: 0 auto; width: 10em; }.calculator::before, .calculator::after { content: " "; display: table; }.calculator::after { clear: both; }.broken { -webkit-animation: broken 2s; animation: broken 2s; -webkit-transform: translate3d(0, -2000px, 0); transform: translate3d(0, -2000px, 0); opacity: 0; }.viewer { color: #c97874; float: left; line-height: 3em; text-align: right; text-overflow: ellipsis; overflow: hidden; width: 7.5em; height: 3em; }button { border: 0; background: rgba(42, 50, 113, 0.28); color: #6cacc5; cursor: pointer; float: left; font: inherit; margin: 0.25em; width: 2em; height: 2em; -webkit-transition: all 0.5s; transition: all 0.5s; }button:hover { background: #201e40; }button:focus { outline: 0;}button:focus::after { -webkit-animation: zoom 1s; animation: zoom 1s; -webkit-animation-iteration-count: 1; animation-iteration-count: 1; -webkit-animation-fill-mode: both; animation-fill-mode: both; content: attr(data-num); cursor: default; font-size: 100px; position: absolute; top: 1.5em; left: 50%; text-align: center; margin-left: -24px; opacity: 0; width: 48px; }.ops:focus::after { content: attr(data-ops); margin-left: -210px; width: 420px; }.equals:focus::after { content: attr(data-result); margin-left: -300px; width: 600px; }.reset { background: rgba(201, 120, 116, 0.28); color: #c97874; font-weight: 400; margin-left: -77px; padding: 0.5em 1em; position: absolute; top: -20em; left: 50%; width: auto; height: auto;}.reset:hover { background: #c97874; color: #100a1c; }.reset.show { top: 20em; -webkit-animation: fadein 4s; animation: fadein 4s; }@-webkit-keyframes zoom { 0% {-webkit-transform: scale(0.2);transform: scale(0.2);opacity: 1;}70% {-webkit-transform: scale(1);transform: scale(1);}100% {opacity: 0;}}@keyframes zoom { 0% {-webkit-transform: scale(0.2);transform: scale(0.2);opacity: 1;}70% {-webkit-transform: scale(1);transform: scale(1);}100% {opacity: 0;}}@-webkit-keyframes broken { 0% {-webkit-transform: translate3d(0, 0, 0);transform: translate3d(0, 0, 0);opacity: 1;}5% {-webkit-transform: rotate(5deg);transform: rotate(5deg);}15% {-webkit-transform: rotate(-5deg);transform: rotate(-5deg);}20% {-webkit-transform: rotate(5deg);transform: rotate(5deg);}25% {-webkit-transform: rotate(-5deg);transform: rotate(-5deg);}50% {-webkit-transform: rotate(45deg);transform: rotate(45deg);}70% {-webkit-transform: translate3d(0, 2000px, 0);transform: translate3d(0, 2000px, 0);opacity: 1;}75% {opacity: 0;}100% {-webkit-transform: translate3d(0, -2000px, 0);transform: translate3d(0, -2000px, 0);}}@keyframes broken { 0% {-webkit-transform: translate3d(0, 0, 0);transform: translate3d(0, 0, 0);opacity: 1;}5% {-webkit-transform: rotate(5deg);transform: rotate(5deg);}15% {-webkit-transform: rotate(-5deg);transform: rotate(-5deg);}20% {-webkit-transform: rotate(5deg);transform: rotate(5deg);}25% {-webkit-transform: rotate(-5deg);transform: rotate(-5deg);}50% {-webkit-transform: rotate(45deg);transform: rotate(45deg);}70% {-webkit-transform: translate3d(0, 2000px, 0);transform: translate3d(0, 2000px, 0);opacity: 1;}75% {opacity: 0;}100% {-webkit-transform: translate3d(0, -2000px, 0);transform: translate3d(0, -2000px, 0);}}/* Reset button fadein */@-webkit-keyframes fadein { 0% {top: 20em;opacity: 0;}50% {opacity: 0;}100% {opacity: 1;}}@keyframes fadein { 0% {top: 20em;opacity: 0;}50% {opacity: 0;}100% {opacity: 1;}}@media (min-width: 420px) {.calculator { width: 12em; }.viewer { width: 8.5em; }button { margin: 0.5em; }}