Created
September 14, 2022 19:02
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<!DOCTYPE html> | |
<html lang="ja"> | |
<head> | |
<meta charset="UTF-8" /> | |
<title>slide</title> | |
</head> | |
<body> | |
<p> | |
<span id="val"></span> | |
<input type="text" size="4" id="input" /> | |
</p> | |
<div> | |
<img id="pic" src="" /> | |
</div> | |
<script> | |
const img = document.getElementById("pic"); | |
const val = document.getElementById("val"); | |
const input = document.getElementById("input"); | |
let num = 0; | |
let list = []; | |
(async () => { | |
const res = await fetch("./"); | |
const parser = new DOMParser(); | |
const htmlDoc = parser.parseFromString(await res.text(), "text/html"); | |
const tr = htmlDoc.querySelectorAll("tr"); | |
for (let i = 0; i <= tr.length - 1; i++) { | |
let link; | |
try { | |
link = tr[i].querySelector("a"); | |
} catch (error) { | |
continue; | |
} | |
if (!link) { | |
continue; | |
} | |
const filename = link.getAttribute("href"); | |
if (filename.match(/\.(jpg|png)/)) { | |
list.push(filename); | |
} | |
} | |
change(num); | |
})().catch((e) => { | |
console.log(e); | |
process.exit(1); | |
}); | |
img.addEventListener("click", () => { | |
change(num + 1); | |
}); | |
img.addEventListener("contextmenu", (event) => { | |
change(num - 1); | |
event.preventDefault(); | |
}); | |
input.addEventListener("change", () => { | |
change(input.value); | |
}); | |
document.addEventListener("keydown", (event) => { | |
switch (event.key) { | |
case "ArrowUp": | |
change(num + 10); | |
event.preventDefault(); | |
break; | |
case "ArrowDown": | |
change(num - 10); | |
event.preventDefault(); | |
break; | |
case "ArrowLeft": | |
change(num - 1); | |
event.preventDefault(); | |
break; | |
case "ArrowRight": | |
change(num + 1); | |
event.preventDefault(); | |
break; | |
} | |
}); | |
function change(n) { | |
num = Number(n); | |
if (num < 0) { | |
num = 0; | |
} | |
if (num > list.length - 1) { | |
num = list.length - 1; | |
} | |
img.src = list[num]; | |
val.innerHTML = `${num} / ${list.length - 1}`; | |
input.value = num; | |
} | |
</script> | |
</body> | |
</html> |
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