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feat: Restore webContents navigation history and page state (#45583)

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* feat: Working navigationHistory.restore with just title/url

Co-authored-by: Felix Rieseberg <fr@makenotion.com>

* feat: Restore page state, too

Co-authored-by: Felix Rieseberg <fr@makenotion.com>

* chore: Docs, lint, tests

Co-authored-by: Felix Rieseberg <fr@makenotion.com>

* Implement feedback

Co-authored-by: Felix Rieseberg <fr@makenotion.com>

* More magic

Co-authored-by: Felix Rieseberg <fr@makenotion.com>

* Make _awaitNextLoad truly private

Co-authored-by: Felix Rieseberg <fr@makenotion.com>

* Implement API group feedback

Co-authored-by: Felix Rieseberg <fr@makenotion.com>

* One more round of feedback

Co-authored-by: Felix Rieseberg <fr@makenotion.com>

---------

Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Felix Rieseberg <fr@makenotion.com>
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docs/tutorial/navigation-history.md
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@ -69,8 +69,25 @@ if (navigationHistory.canGoToOffset(2)) {
}
```
## Restoring history
A common flow is that you want to restore the history of a webContents - for instance to implement an "undo close tab" feature. To do so, you can call `navigationHistory.restore({ index, entries })`. This will restore the webContent's navigation history and the webContents location in said history, meaning that `goBack()` and `goForward()` navigate you through the stack as expected.
```js @ts-type={navigationHistory:Electron.NavigationHistory}
const firstWindow = new BrowserWindow()
// Later, you want a second window to have the same history and navigation position
async function restore () {
const entries = firstWindow.webContents.navigationHistory.getAllEntries()
const index = firstWindow.webContents.navigationHistory.getActiveIndex()
const secondWindow = new BrowserWindow()
await secondWindow.webContents.navigationHistory.restore({ index, entries })
}
```
Here's a full example that you can open with Electron Fiddle:
```fiddle docs/fiddles/features/navigation-history
```