HarmonyOS @ohos.data.preferences

import {BusinessError} from '@ohos.base'; 
 
let promise = preferences.get('startup', 'default'); 
promise.then((data: dataPreferences.ValueType) => { 
  console.info("Succeeded in getting value of 'startup'. Data: " + data); 
}).catch((err: BusinessError) => { 
  console.error("Failed to get value of 'startup'. code =" + err.code + ", message =" + err.message); 
})