Avoid showing unnecessary JS errors when there are elements with diff…

…erent origin on the page (go-gitea#29081)

Try to fix go-gitea#29080

web_src/js/modules/dirauto.js

@@ -1,5 +1,6 @@
-// for performance considerations, it only uses performant syntax
+import {isDocumentFragmentOrElementNode} from '../utils/dom.js';
 
+// for performance considerations, it only uses performant syntax
 function attachDirAuto(el) {
  if (el.type !== 'hidden' &&
  el.type !== 'checkbox' &&
@@ -18,7 +19,7 @@ export function initDirAuto() {
  const len = mutation.addedNodes.length;
  for (let i = 0; i < len; i++) {
  const addedNode = mutation.addedNodes[i];
- if (addedNode.nodeType !== Node.ELEMENT_NODE && addedNode.nodeType !== Node.DOCUMENT_FRAGMENT_NODE) continue;
+ if (!isDocumentFragmentOrElementNode(addedNode)) continue;
  if (addedNode.nodeName === 'INPUT' || addedNode.nodeName === 'TEXTAREA') attachDirAuto(addedNode);
  const children = addedNode.querySelectorAll('input, textarea');
  const len = children.length;

web_src/js/modules/tippy.js

@@ -1,4 +1,5 @@
 import tippy, {followCursor} from 'tippy.js';
+import {isDocumentFragmentOrElementNode} from '../utils/dom.js';
 
 const visibleInstances = new Set();
 
@@ -136,8 +137,6 @@ function attachChildrenLazyTooltip(target) {
  }
 }
 
-const elementNodeTypes = new Set([Node.ELEMENT_NODE, Node.DOCUMENT_FRAGMENT_NODE]);
-
 export function initGlobalTooltips() {
  // use MutationObserver to detect new "data-tooltip-content" elements added to the DOM, or attributes changed
  const observerConnect = (observer) => observer.observe(document, {
@@ -152,11 +151,10 @@ export function initGlobalTooltips() {
  if (mutation.type === 'childList') {
  // mainly for Vue components and AJAX rendered elements
  for (const el of mutation.addedNodes) {
- if (elementNodeTypes.has(el.nodeType)) {
- attachChildrenLazyTooltip(el);
- if (el.hasAttribute('data-tooltip-content')) {
- attachLazyTooltip(el);
- }
+ if (!isDocumentFragmentOrElementNode(el)) continue;
+ attachChildrenLazyTooltip(el);
+ if (el.hasAttribute('data-tooltip-content')) {
+ attachLazyTooltip(el);
  }
  }
  } else if (mutation.type === 'attributes') {

web_src/js/utils/dom.js

@@ -59,6 +59,17 @@ export function onDomReady(cb) {
  }
 }
 
+// checks whether an element is owned by the current document, and whether it is a document fragment or element node
+// if it is, it means it is a "normal" element managed by us, which can be modified safely.
+export function isDocumentFragmentOrElementNode(el) {
+ try {
+ return el.ownerDocument === document && el.nodeType === Node.ELEMENT_NODE || el.nodeType === Node.DOCUMENT_FRAGMENT_NODE;
+ } catch {
+ // in case the el is not in the same origin, then the access to nodeType would fail
+ return false;
+ }
+}
+
 // autosize a textarea to fit content. Based on
 // https://github.com/github/textarea-autosize
 // ---------------------------------------------------------------------