MediaWiki:Common.js: Difference between revisions

MediaWiki:Common.js (view source)

265 bytes removed , 23 July 2023

Sticky headers: Try ResizeObserver instead of MutationObserver (cannot observe a computed style change)

12,787

edits

@@ Line 524: / Line 524: @@
 function setStickyHeaderTop(addObservers) {
  var observer = null;
- var observerCfg = { attributes: true, childList: false, subtree: false };
+ if ((addObservers) && (ResizeObserver !== undefined)) {
- if (addObservers) {
+ observer = new ResizeObserver(
- observer = new MutationObserver(
+ function(entries) {
- function(mutationList, observer) {
+ setStickyHeaderTop(false);
- for (var i = 0; i < mutationList.length; i++) {
- var mutation = mutationList[i];
- if ((mutation.type === 'attributes') && (mutation.attributeName === 'offsetHeight')) {
- setStickyHeaderTop(false);
- }
- }
  });
  }
@@ Line 549: / Line 543: @@
  firstHeight = firstRow[0].offsetHeight;
  if (addObservers) {
- observer.observe(firstRow[0], observerCfg);
+ observer.observe(firstRow[0]);
  }
  var firstHeaders = firstRow[0].getElementsByTagName('th');