Created
May 4, 2022 15:11
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(function () { | |
function urlsToAbsolute(nodeList) { | |
if (!nodeList.length) { | |
return []; | |
} | |
var attrName = 'href'; | |
if (nodeList[0].__proto__ === HTMLImageElement.prototype || nodeList[0].__proto__ === HTMLScriptElement.prototype) { | |
attrName = 'src'; | |
} | |
nodeList = [].map.call(nodeList, function (el, i) { | |
var attr = el.getAttribute(attrName); | |
if (!attr) { | |
return; | |
} | |
var absURL = /^(https?|data):/i.test(attr); | |
if (absURL) { | |
return el; | |
} else { | |
return el; | |
} | |
}); | |
return nodeList; | |
} | |
function screenshotPage() { | |
urlsToAbsolute(document.images); | |
urlsToAbsolute(document.querySelectorAll("link[rel='stylesheet']")); | |
var screenshot = document.documentElement.cloneNode(true); | |
var b = document.createElement('base'); | |
b.href = document.location.protocol + '//' + location.host; | |
var head = screenshot.querySelector('head'); | |
head.insertBefore(b, head.firstChild); | |
screenshot.style.pointerEvents = 'none'; | |
screenshot.style.overflow = 'scroll'; | |
screenshot.style.webkitUserSelect = 'none'; | |
screenshot.style.mozUserSelect = 'none'; | |
screenshot.style.msUserSelect = 'none'; | |
screenshot.style.oUserSelect = 'none'; | |
screenshot.style.userSelect = 'none'; | |
screenshot.dataset.scrollX = window.scrollX; | |
screenshot.dataset.scrollY = window.scrollY; | |
var script = document.createElement('script'); | |
script.textContent = '(' + addOnPageLoad_.toString() + ')();'; | |
screenshot.querySelector('body').appendChild(script); | |
var blob = new Blob([screenshot.outerHTML], { | |
type: 'text/html' | |
}); | |
return blob; | |
} | |
function addOnPageLoad_() { | |
window.addEventListener('DOMContentLoaded', function (e) { | |
var scrollX = document.documentElement.dataset.scrollX || 0; | |
var scrollY = document.documentElement.dataset.scrollY || 0; | |
window.scrollTo(scrollX, scrollY); | |
}); | |
} | |
function saveChangeAndScreenshot(html) { | |
const now = new Date().toString(); | |
window.URL = window.URL || window.webkitURL; | |
localStorage.setItem(`lobby.screenshot.${now}`, window.URL.createObjectURL(screenshotPage())) | |
localStorage.setItem(`lobby.html.${now}`, html) | |
} | |
let lastPageHtml = ''; | |
window.addEventListener('DOMContentLoaded', function (e) { | |
setInterval(() => { | |
if (lastPageHtml !== document.querySelector('body').innerHTML) { | |
lastPageHtml = document.querySelector('body').innerHTML; | |
saveChangeAndScreenshot(lastPageHtml); | |
} | |
}, 100) | |
}) | |
})(); |
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