array

function abc () {
  console.log('aha---------------1');
  helper.initialNotes.forEach(async (note) => {
    console.log('aha---------------2');
    let noteObject = new Note(note)
    await noteObject.save()
    console.log('aha---------------3');
  })
  console.log('aha---------------4');
}

为什么 执行顺序是1243 ?
the await commands defined inside of the forEach loop are not in the beforeEach function, but in separate functions that beforeEach will not wait for.

怎么修改呢? 方式1：

// 按顺序
async function abc(){
  for (let note of helper.initialNotes) {
    let noteObject = new Note(note)
    await noteObject.save()
  }
}

方式2：

// 不按顺序
async function abc () {
  const noteObjects = helper.initialNotes
    .map(note => new Note(note))
  const promiseArray = noteObjects.map(note => note.save())
  await Promise.all(promiseArray)
})

Promise.all()