# BaseContext

**BaseContext** is an abstract class that specifies whether a child class **Context** is used for the stage model or FA model. It is the parent class for all types of **Context**.

> **NOTE**
>
> The initial APIs of this module are supported since API version 8. Newly added APIs will be marked with a superscript to indicate their earliest API version.

## Modules to Import

```ts
import common from '@ohos.app.ability.common';
```

**System capability**: SystemCapability.Ability.AbilityRuntime.Core

| Name      | Type  | Readable  | Writable  | Description     |
| -------- | ------ | ---- | ---- | ------- |
| stageMode | boolean | Yes   | Yes   | Whether the child class **Context** is used for the stage model.<br>**true**: used for the stage model.<br>**false**: used for the FA model.|

**Example**

Take the stage model as an example. You can access the **stageMode** field through **UIAbilityContext**.

```ts
import UIAbility from '@ohos.app.ability.UIAbility';

class EntryAbility extends UIAbility {
    onCreate(want, launchParam) {
        // EntryAbility onCreate, isStageMode: true
        console.log('EntryAbility onCreate, isStageMode: ${this.context.stageMode}');
    }
}
```