Sudo/www/index.html

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2022-02-22 13:40:37 +00:00
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>The Sudo</title>
<style>
html,
body{
height: 100%;
margin: 0;
overflow: hidden;
}
body {
display: flex;
align-items: center;
justify-content: center;
background-color: black;
}
p {
line-height: 1;
width: 30px;
}
span {
display: block;
color: #b3ffc7;
font-size: 24px;
text-align: center;
width: 30px;
height: 30px;
opacity: 0;
font-family: Helvetica, sans-serif;
}
</style>
</head>
<body>
<script>
const columnCount = Math.floor(window.innerWidth / 30);
const rowCount = Math.floor(window.innerHeight / 30);
for(let i=0; i<columnCount; i++) {
const p = document.createElement('p');
setupColumn(p);
document.body.append(p);
}
function setupColumn(p) {
const delay = random(100, 300);
const duration = random(100, 2000);
const hasChildren = p.children.length > 0;
for(let j=0; j<rowCount; j++){
const span = hasChildren ? p.children.item(j) : document.createElement('span');
span.innerText = getRandomChar();
const animation = span.animate([
{ opacity: '1' },
{ opacity: '0.05' }
], {
duration: duration,
delay: delay + (j * 75), // add delay for every char
fill: 'forwards' // keep element with the last state of anim
});
// re build column after last char disappear
if(j === rowCount-1) {
animation.onfinish = () => {
setupColumn(p);
};
}
if(!hasChildren) {
p.appendChild(span);
}
}
}
function random(from, to) {
return Math.trunc(Math.random() * (to - from + 1) + from);
}
function getRandomChar() {
// some ranges for chars of latin and other alphabets
const charRanges = [
[0x3041, 0x30ff],
[0x0021, 0x007a],
[0x00bc, 0x02af]
];
const i = random(0, charRanges.length - 1);
return String.fromCharCode(random(charRanges[i][0], charRanges[i][1]));
}
</script>
</body>
</html>