window.onerror = () => { console.log('window.onerror')}
window.onunhandledrejection = () => { console.log('window.onunhandledrejection') }
const fetchDataSuccess = () => Promise.resolve({ name:'123'})
const fetchDataFail = () => Promise.reject({ name:'123'})
const testTryCatch = async() =>{
   try{
    // Promise.reject('reject')
    // throw Error('err')
       await fetchDataFail()
       console.log('fetch success')
  } catch(e){
    console.log('catch error:',e)
  } 
}
const testPromiseError = () => {
  try{
  new Promise((resolve, reject) => {
    throw new Error()
      // resolve({})
  }).then( () => {
    console.log('resolved')
      // throw Error()
  }, err => {
    console.log('rejected')
    throw err
  })
  // .catch(err => {
  //   console.log('catch')
  // })
  }catch(e){
      console.log('testPromiseError try-catch')
  }
}
// testTryCatch();
// testPromiseError();