--- a/pixiv-fanbox-unlazy.user.js	Sat Dec 24 06:55:55 2022 +0900
+++ b/pixiv-fanbox-unlazy.user.js	Sat Dec 24 21:28:36 2022 +0900
@@ -1,69 +1,55 @@
 // ==UserScript==
 // @name         pixiv fanbox no lazy loading image
 // @namespace    https://myconan.net
-// @version      2.0.2
+// @version      2.1.0
 // @description  Lazy loading is bad for environment. Disable it.
 // @author       nanaya
 // @match        https://*.fanbox.cc/*
 // @grant        none
-// @downloadURL  https://hg.myconan.net/ec-userscripts/raw-file/tip/pixiv-fanbox-unlazy.user.js
+// @run-at       document-start
+// @downloadURL  https://hg.nanaya.net/ec-userscripts/raw-file/tip/pixiv-fanbox-unlazy.user.js
 // ==/UserScript==
 
-;(function () {
-  'use strict'
+'use strict'
 
-  const imageUrlPrefix = 'https://downloads.fanbox.cc/images/post/'
-
-  const fix = function (link) {
-    const href = link.href
+const imageUrlPrefix = 'https://downloads.fanbox.cc/images/post/'
 
-    // basic sanity check
-    if (typeof href !== 'string' || !href.startsWith(imageUrlPrefix)) {
-      return
-    }
+function disableEventLink (event) {
+  event.stopPropagation()
+}
 
-    // don't run again if already run on passed link
-    if (link._ecUserscript) {
-      return
-    }
-    link._ecUserscript = true
+function fix (link) {
+  const href = link.href
 
-    link.addEventListener('click', (event) => {
-      event.stopPropagation()
-    })
-    link.innerHTML = `<img style="width: 100%;" src="${href}" />`
+  // basic sanity check
+  if (typeof href !== 'string' || !href.startsWith(imageUrlPrefix)) {
+    return
   }
 
-  const onMutate = function (mutations) {
-    for (const mutation in mutations) {
-      run(mutation.addedNodes)
-    }
+  // don't run again if already run on passed link
+  if (link._ecUserscript) {
+    return
   }
+  link._ecUserscript = true
 
-  // loop through passed nodes (or body if called without arguments)
-  const run = function (nodes) {
-    if (nodes == null) {
-      nodes = [document.body]
-    }
+  link.addEventListener('click', disableEventLink)
+  const image = document.createElement('img')
+  image.style.width = '100%'
+  image.src = href
+  link.replaceChildren(image)
+}
 
-    for (let i = 0; i < nodes.length; i++) {
-      // first try fixing itself
-      fix(nodes[i])
-
-      // and then find all the links inside
-      const links = nodes[i].querySelectorAll(`[href^="${imageUrlPrefix}"]`)
-
-      for (let j = 0; j < links.length; j++) {
-        fix(links[j])
+function onMutate (mutations) {
+  for (const mutation of mutations) {
+    for (const node of mutation.addedNodes) {
+      if (node instanceof window.HTMLElement) {
+        for (const link of node.querySelectorAll(`[href^="${imageUrlPrefix}"]`)) {
+          fix(link)
+        }
       }
     }
   }
-
-  // the observer
-  const observer = new window.MutationObserver(onMutate)
+}
 
-  // start the observer
-  observer.observe(document, { childList: true, subtree: true })
-  // initial run on existing document
-  run()
-}).call()
+const observer = new window.MutationObserver(onMutate)
+observer.observe(document, { childList: true, subtree: true })