Array containing http.get results becomes undefined

 const http=axios.create({
    baseURL: 'base-url',
})

vara = [ ]

function addArray() {
  http.get('/hoge/fuga', {data:{}}.then(response=>{
    a. push (response.data.name)
  })
}

Array.from({length:30}.map()=>{
    addArray()
    console.log(a[0])
  })

 [ ]
    0: 'Name'
    length —0
    __proto —Array(0)
        concat —f concat()
        It's long, so I'll skip it.