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demoanimations.html
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demoanimations.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Demo Animations for Canvas Shifting</title>
<style>
#canvas {
width: 300px;
height: 200px;
position: relative;
background: darkkhaki;
margin: 1em 3em;
}
#slice {
background: burlywood;
position: absolute;
z-index: 2;
}
#rest {
position: absolute;
background: saddlebrown;
}
#buttons {
margin: 1em 1.5em;
}
button {
font-family: verdana;
background: olive;
color: white;
border: none;
padding: 5px 10px;
}
.animating #buttons {
opacity: .2
}
</style>
</head>
<body>
<div id="canvas">
<div id="slice"></div>
<div id="rest"></div>
</div>
<div id="buttons">
<button id="left">Shift left</button>
<button id="right">Shift right</button>
<button id="up">Shift up</button>
<button id="down">Shift down</button>
</div>
<script>
let buttons = document.querySelector('#buttons');
let slice = document.querySelector('#slice');
let rest = document.querySelector('#rest');
let cssprops = {
x:'left', y:'top', w:'width', h:'height', o:'opacity'
};
let i = 0;
let ani = null;
let delay = 1000;
let animation = {
left:{
setup: [
{element: '#slice', x: 0, y: 0, w: 20, h: 200},
{element: '#rest', x: 20, y: 0, w: 280, h: 200},
],
frames: [
{element: '#slice', x: -15, y: -10, up: 1},
{element: '#rest', x: 0},
{element: '#slice', x: 295, y: -10, up: 1},
{element: '#slice', x: 280, y: 0}
]
},
right:{
setup: [
{element: '#slice', x: 280, y: 0, w: 20, h: 200},
{element: '#rest', x: 0, y: 0, w: 280, h: 200}
],
frames: [
{element: '#slice', x: 295, y: -10, up:1},
{element: '#rest', x: 20, y: 0},
{element: '#slice', x: -15, y: -10, up: 1},
{element: '#slice', x: 0, y: 0}
]
},
up: {
setup: [
{element: '#slice', x: 0, y: 0, w: 300, h: 20},
{element: '#rest', x: 0, y: 20, w: 300, h: 180}
],
frames: [
{element: '#slice', x: 10, y: 5, up:1},
{element: '#rest', x: 0, y: 0},
{element: '#slice', x: 10, y: 175, up:1},
{element: '#slice', x: 0, y: 180},
]
},
down: {
setup: [
{element: '#slice', x: 0, y: 180, w: 300, h: 20},
{element: '#rest', x: 0, y: 0, w: 300, h: 180}
],
frames: [
{element: '#slice', x: 10, y: 175, up:1},
{element: '#rest', x: 0, y: 20},
{element: '#slice', x: 10, y: 5, up:1},
{element: '#slice', x: 0, y: 0},
]
},
};
document.body.addEventListener('click', e => {
if (!document.body.classList.contains('animating')){
let id = e.target.id;
if (id) {
animation[id].setup.forEach(a => {
let elm = document.querySelector(a.element);
elm.style.transition = '';
setprops(elm, a);
});
i = 0;
ani = animation[id].frames;
document.body.className = 'animating';
window.setTimeout(shift, delay);
}
}
});
const setprops = (elm, a) => {
['x','y','w','h'].forEach(p => {
if (a[p] !== undefined) {
elm.style[cssprops[p]] = a[p] + 'px';
}
});
if (a.o !== undefined) {
elm.style.opacity = `${a.o}`;
}
}
const shift = e => {
if (ani[i]) {
let elm = document.querySelector(ani[i].element);
let time = ani[i].time || '1000';
let delay = ani[i].delay ? ' ' + ani[i].delay+'ms' : '';
setprops(elm,ani[i]);
elm.style.boxShadow = (ani[i].up) ? `5px 5px 4px #333` : '';
elm.style.transition = `all ${time}ms${delay}`;
i++;
let recall = +time + (delay ? delay.replace(' ','') : 0);
window.setTimeout(shift, recall)
} else {
document.body.className = '';
}
};
</script>
</body>
</html>