JavaScript 一个在最小值和最大值的范围中取任意3个值的有趣动画

js math with foreach.js, countUp.js, Waypoints, and Flexbox

countUp.js, Waypoints.js

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编译

JavaScript

var countAnimation = (function() {

// Returns a random integer between min (included) and max (excluded)
    // Using Math.round() will give you a non-uniform distribution!
    // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/random
    var _getRandomInt = function(min, max) {
        return Math.floor(Math.random() * (max - min)) + min;
    }

var _countList = document.querySelectorAll('[data-count]');

var startCount = function() {
        // https://github.com/toddmotto/foreach
        forEach(_countList, function(value, index) {
            var endValue = _getRandomInt(50, 100);

// https://github.com/inorganik/countUp.js
            var queueCountAnimation = new countUp(value, 0, endValue, 0, 12);
            queueCountAnimation.start();
        });
    };

return {
        startCount: startCount
    };

})();

// http://imakewebthings.com/waypoints/
// https://github.com/imakewebthings/waypoints
var waypoint = new Waypoint({
    element: document.getElementById('pick-three'),
    handler: function(direction) {
        if (direction === 'down') {
            countAnimation.startCount()
        }
    },
    offset: '50%'
})

// https://github.com/cferdinandi/smooth-scroll
smoothScroll.init();

编译

CSS

@charset "UTF-8";
@import url("http://fonts.googleapis.com/css?family=Roboto:900&text=1234567890PICKTHREE»");
* {
    margin: 0;
    padding: 0;
    border: 0;
}
html {
    box-sizing: border-box;
    background: -webkit-linear-gradient(top, #79BD9A 0%, #3B8686 100%);
    background: linear-gradient(to bottom, #79BD9A 0%, #3B8686 100%);
}
*,
*:before,
*:after {
    box-sizing: inherit;
}
body {
    height: 300vh;
    background: #3B8686;
    background: url("data:image/svg+xml;charset=utf-8,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22100%22%20height%3D%2220%22%3E%3Cdefs%3E%3Cpattern%20patternUnits%3D%22userSpaceOnUse%22%20id%3D%22c%22%20width%3D%2210%22%20height%3D%2220%22%20x%3D%220%22%20y%3D%220%22%20viewBox%3D%220%200%205%2010%22%3E%3Cpath%20fill-opacity%3D%220%22%20stroke%3D%22%230B486B%22%20stroke-width%3D%221%22%20d%3D%22M-2%201L7%2010M-2%206L7%2015M-2-4L7%205%22%2F%3E%3C%2Fpattern%3E%3Cpattern%20patternUnits%3D%22userSpaceOnUse%22%20id%3D%22c2%22%20width%3D%2210%22%20height%3D%2220%22%20x%3D%22100%22%20y%3D%220%22%20viewBox%3D%220%200%205%2010%22%3E%3Cpath%20fill-opacity%3D%220%22%20stroke%3D%22%230B486B%22%20stroke-width%3D%221%22%20d%3D%22M7%201L-2%2010M7%206L-2%2015M7-4L-2%205%22%2F%3E%3C%2Fpattern%3E%3C%2Fdefs%3E%3Crect%20width%3D%2250%22%20height%3D%22100%22%20fill%3D%22url(%23c)%22%2F%3E%3Crect%20x%3D%2250%22%20width%3D%2250%22%20height%3D%22100%22%20fill%3D%22url(%23c2)%22%2F%3E%3C%2Fsvg%3E");
    background-attachment: fixed;
    font-family: 'Roboto', sans-serif;
    text-transform: uppercase;
    color: #e7f8cf;
    text-shadow: 1vh 1vh #CFF09E, 2vh 2vh #A8DBA8, 3vh 3vh #79BD9A, 4vh 4vh #3B8686, 5vh 5vh #0B486B;
    text-align: center;
}
.wrapper {
    margin: 0 auto;
    max-width: 1200px;
}
.container {
    display: -webkit-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-pack: justify;
    -webkit-justify-content: space-between;
    -ms-flex-pack: justify;
    justify-content: space-between;
    -webkit-box-align: center;
    -webkit-align-items: center;
    -ms-flex-align: center;
    align-items: center;
    height: 100vh;
}
@-webkit-keyframes pulse {
    0% {
        -webkit-transform: scale(1);
        transform: scale(1);
    }
    50% {
        -webkit-transform: scale(1.05);
        transform: scale(1.05);
    }
    100% {
        -webkit-transform: scale(1);
        transform: scale(1);
    }
}
@keyframes pulse {
    0% {
        -webkit-transform: scale(1);
        transform: scale(1);
    }
    50% {
        -webkit-transform: scale(1.05);
        transform: scale(1.05);
    }
    100% {
        -webkit-transform: scale(1);
        transform: scale(1);
    }
}
.cta-container {
    margin-bottom: 100vh;
}
.cta-anchor {
    display: block;
    margin: 0 auto;
    font-size: 10vw;
    color: inherit;
    text-decoration: none;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    -webkit-animation: pulse 5s infinite;
    animation: pulse 5s infinite;
}
.cta-anchor:after {
    content: '\00BB';
    display: block;
    -webkit-transform: rotate(90deg);
    transform: rotate(90deg);
    font-size: 5vw;
    text-shadow: 0.5vh -0.5vh #CFF09E, 1vh -1vh #A8DBA8, 1.5vh -1.5vh #79BD9A, 2vh -2vh #3B8686, 2.5vh -2.5vh #0B486B;
    line-height: 1;
}
.count-item {
    -webkit-box-flex: 1;
    -webkit-flex: 1;
    -ms-flex: 1;
    flex: 1;
    font-size: 10vw;
}

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js math with foreach.js, countUp.js, Waypoints, and Flexbox

countUp.js, Waypoints.js

编辑器支持Emmet

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js math with foreach.js, countUp.js, Waypoints, and Flexbox

countUp.js, Waypoints.js

编辑器支持Emmet

快捷键

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