Add OGP script

code:script.js

async function getPageData() {

}

const getHeadHtml = async ({updated, descriptions}) => {

return `

<meta property="og:title" content="${scrapbox.Page.title}" />

<meta property="og:type" content="website" />

<meta property="og:updated_time" content="${new Date(updated * 1000).toISOString()}" />

<meta name="description" content="${descriptions.map(x => x.slice(1, -1)).join(" ").replace(/"/g, "\\\"")}" />

<meta name="language" content="Japanese" />

<meta name="author" content="美濃 佑輝" />`;

}

async function addScrapboxMeta(){

const head = document.head;

const div = document.createElement("div");

const json = await getPageData();

const metaTags = await getHeadHtml(json).then(html => {

div.innerHTML = html;

metaTags.forEach(x => {

x.remove();

head.append(x);

});

return metaTags

});

const time = document.createElement("time");

time.dateTime = new Date(json.created * 1000).toISOString();

document.body.append(time);

metaTags.push(time);

return metaTags

}

function initTags () {

let metaTags = [];

let doNotEnter = false;

const update = async (evName) => {

if (doNotEnter) {

return;

} else {

doNotEnter = true;

}

for (const meta of metaTags) {

meta.remove();

}

metaTags = await addScrapboxMeta();

}

doNotEnter = false;

}

scrapbox.on(evName, () => update(evName));

}

update(null);

}

initTags();