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Fix: only refresh styles if the CSS has changed #6537

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merged 1 commit into from Mar 17, 2022
Merged

Fix: only refresh styles if the CSS has changed #6537

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9 changes: 7 additions & 2 deletions core/modules/startup/render.js
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Expand Up @@ -42,12 +42,17 @@ exports.startup = function() {
$tw.styleWidgetNode = $tw.wiki.makeTranscludeWidget(PAGE_STYLESHEET_TITLE,{document: $tw.fakeDocument});
$tw.styleContainer = $tw.fakeDocument.createElement("style");
$tw.styleWidgetNode.render($tw.styleContainer,null);
$tw.styleWidgetNode.assignedStyles = $tw.styleContainer.textContent;
$tw.styleElement = document.createElement("style");
$tw.styleElement.innerHTML = $tw.styleContainer.textContent;
$tw.styleElement.innerHTML = $tw.styleWidgetNode.assignedStyles;
document.head.insertBefore($tw.styleElement,document.head.firstChild);
$tw.wiki.addEventListener("change",$tw.perf.report("styleRefresh",function(changes) {
if($tw.styleWidgetNode.refresh(changes,$tw.styleContainer,null)) {
$tw.styleElement.innerHTML = $tw.styleContainer.textContent;
var newStyles = $tw.styleContainer.textContent;
if(newStyles !== $tw.styleWidgetNode.assignedStyles) {
$tw.styleWidgetNode.assignedStyles = newStyles;
$tw.styleElement.innerHTML = $tw.styleWidgetNode.assignedStyles;
}
}
}));
// Display the $:/core/ui/PageTemplate tiddler to kick off the display
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