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Replace unload event handler for custom panels with pagehide (#28781)

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* Replace `unload` event handler for custom panels

* Handle restore from bfcache

---------

Co-authored-by: Petar Petrov <MindFreeze@users.noreply.github.com>
This commit is contained in:
Matthias Alphart
2026-01-06 10:07:52 +01:00
committed by GitHub
parent bf6887541b
commit 4b7b5fa21a
1 changed files with 17 additions and 6 deletions
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23
src/entrypoints/custom-panel.ts
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@@ -28,6 +28,7 @@ window.loadES5Adapter = () => {
};
let panelEl: HTMLElement | undefined;
let initialized = false;
function setProperties(properties) {
if (!panelEl) {
@@ -128,13 +129,23 @@ function initialize(
});
}
document.addEventListener(
"DOMContentLoaded",
() => window.parent.customPanel!.registerIframe(initialize, setProperties),
{ once: true }
);
function handleReady() {
if (initialized) return;
initialized = true;
window.parent.customPanel!.registerIframe(initialize, setProperties);
}
window.addEventListener("unload", () => {
// Initial load
if (document.readyState === "loading") {
document.addEventListener("DOMContentLoaded", handleReady, { once: true });
} else {
handleReady();
}
window.addEventListener("pageshow", handleReady);
window.addEventListener("pagehide", () => {
initialized = false;
// allow disconnected callback to fire
while (document.body.lastChild) {
document.body.removeChild(document.body.lastChild);