Function defineExtension

defineExtension<
    TMap extends Readonly<Record<string, ServiceToken<unknown>>>,
    TApi,
>(
    options: DefineExtensionOptionsWithExports<TMap, TApi>,
): ExtensionApplication<TApi>
Defines an extension.

Static preflight runs synchronously when this function is called (normally while the extension entry module is evaluated), so an id clash or a broken service graph fails before VS Code is touched. Environment-dependent preflight still runs during activation, when trust/workspace/host facts exist. No VS Code API is called until activate.
Type Parameters
- TMap extends Readonly<Record<string, ServiceToken<unknown>>>
- TApi
Parameters
- options: DefineExtensionOptionsWithExports<TMap, TApi>
Returns ExtensionApplication<TApi>
Example
```
// extension.ts
const app = defineExtension({ name: 'Sample', modules: [projectsModule] });

export const activate = app.activate;
export const deactivate = app.deactivate;
```
- Defined in src/vscode/foundation/extension.ts:161
defineExtension(options: DefineExtensionOptions): ExtensionApplication
Defines an extension.

Static preflight runs synchronously when this function is called (normally while the extension entry module is evaluated), so an id clash or a broken service graph fails before VS Code is touched. Environment-dependent preflight still runs during activation, when trust/workspace/host facts exist. No VS Code API is called until activate.
Parameters
- options: DefineExtensionOptions
Returns ExtensionApplication
Example
```
// extension.ts
const app = defineExtension({ name: 'Sample', modules: [projectsModule] });

export const activate = app.activate;
export const deactivate = app.deactivate;
```
- Defined in src/vscode/foundation/extension.ts:164

Function defineExtension

Type Parameters

Parameters

Returns ExtensionApplication<TApi>

Example

Parameters

Returns ExtensionApplication

Example

Settings