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fix(ui): only populate settings once (#31958)

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We populate `localStorage` using an init script. Currently, this script
isn't just run for the UI though, but also for all iframes. So we're
resetting `localStorage` every time the UI loads an iframe.

This hasn't been a problem in the past, because the only consumer of
`localStorage`, `Settings`, only read from `localStorage` once and kept
most state in `useState` afterwards. With
https://github.com/microsoft/playwright/pull/31911, this is no longer
true, so the bug starts biting us!

The fix is to ensure the init script isn't run on iframes.
This commit is contained in:
Simon Knott 2024-08-01 17:28:48 +02:00 committed by GitHub
parent c858554dca
commit 76cca7fc2c
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packages/playwright-core/src/server/launchApp.ts
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@ -90,6 +90,8 @@ export async function syncLocalStorageWithSettings(page: Page, appName: string)
// iframes w/ snapshots, etc.
if (location && location.protocol === 'data:')
return;
if (window.top !== window)
return;
Object.entries(settings).map(([k, v]) => localStorage[k] = v);
(window as any).saveSettings = () => {
(window as any)._saveSerializedSettings(JSON.stringify({ ...localStorage }));