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fix ResizeObserver not working in a popout #519

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fix ResizeObserver not working in a popout #519

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9 changes: 6 additions & 3 deletions src/view/Layout.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -263,8 +263,11 @@ export class LayoutInternal extends React.Component<ILayoutInternalProps, ILayou
this.layoutWindow.window = this.currentWindow;
this.layoutWindow.toScreenRectFunction = (r) => this.getScreenRect(r);

this.resizeObserver = new ResizeObserver(entries => {
requestAnimationFrame(() => {
// Spec says ResizeObserver triggers callback in the same window as the observed element,
// but it's just not true in Chrome, so, use ResizeObserver from PARENT window
const parentWindow = (this.currentDocument.defaultView ?? window);
this.resizeObserver = new parentWindow.ResizeObserver(entries => {
parentWindow.requestAnimationFrame(() => {
this.updateRect();
});
});
Expand All @@ -279,7 +282,7 @@ export class LayoutInternal extends React.Component<ILayoutInternalProps, ILayou
this.currentWindow.addEventListener("resize", () => {
this.updateRect();
});

this.resizeObserver.observe(this.currentWindow.document.documentElement);
const sourceElement = this.props.mainLayout!.getRootDiv()!;
const targetElement = this.selfRef.current!;

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