1# API Switching Overview 2 3 4Due to the differences in the thread model and process model, certain APIs (marked with **FAModelOnly** in the SDK) can be used only in the FA model. When switching an application from the FA model to the stage model, replace the APIs marked with **FAModelOnly** in the application with the APIs supported in the stage model. This topic uses the switching of **startAbility()** as an example. 5 6 7 8 9 10- Sample code of **startAbility()** in the FA model: 11 12 ```ts 13 import fa from '@ohos.ability.featureAbility'; 14 let parameter = { 15 "want": { 16 bundleName: "com.example.myapplication", 17 abilityName: "com.example.myapplication.EntryAbility" 18 } 19 } 20 fa.startAbility(parameter).then((data) => { 21 console.info('startAbility success'); 22 }).catch((error) => { 23 console.error('startAbility failed.'); 24 }) 25 ``` 26 27- Sample code of **startAbility()** in the stage model: 28 29 ```ts 30 // context is a member of the ability object and is required for invoking inside a non-ability object. 31 // Pass in the Context object. 32 let wantInfo = { 33 bundleName: "com.example.myapplication", 34 abilityName: "EntryAbility" 35 }; 36 this.context.startAbility(wantInfo).then((data) => { 37 console.info('startAbility success.'); 38 }).catch((error) => { 39 console.error('startAbility failed.'); 40 }) 41 ``` 42
