Restore webview panels that have been persisted when vscode shuts down.
There are two types of webview persistence:
- Persistence within a session.
- Persistence across sessions (across restarts of the editor).
A WebviewPanelSerializer
is only required for the second case: persisting a webview across sessions.
Persistence within a session allows a webview to save its state when it becomes hidden
and restore its content from this state when it becomes visible again. It is powered entirely
by the webview content itself. To save off a persisted state, call acquireVsCodeApi().setState()
with
any json serializable object. To restore the state again, call getState()
// Within the webview
const vscode = acquireVsCodeApi();
// Get existing state
const oldState = vscode.getState() || { value: 0 };
// Update state
setState({ value: oldState.value + 1 })
A WebviewPanelSerializer
extends this persistence across restarts of the editor. When the editor is shutdown,
it will save off the state from setState
of all webviews that have a serializer. When the
webview first becomes visible after the restart, this state is passed to deserializeWebviewPanel
.
The extension can then restore the old WebviewPanel
from this state.
Parameters:
T | Type of the webview's state. |
---|
Fields
deserializeWebviewPanel(webviewPanel:WebviewPanel, state:T):Thenable<Void>
Restore a webview panel from its serialized state
.
Called when a serialized webview first becomes visible.
Parameters:
webviewPanel | Webview panel to restore. The serializer should take ownership of this panel. The
serializer must restore the webview's |
---|---|
state | Persisted state from the webview content. |
Returns:
Thenable indicating that the webview has been fully restored.