How to set variable outside axios get [duplicate]

问题

This question already has answers here:

How do I return the response from an asynchronous call? (36 answers)

Closed 2 years ago.

I can't return a value using this function because it is empty.

getNameById (id) {

    var name = ''

    axios.get('/names/?ids=' + id)
      .then(response => {
        this.response = response.data
        name = this.response[0].name
      })
      .catch(e => {
        this.errors.push(e)
      })
    // Is empty
    console.log('Name ' + name)
    return name
  }

How do I access the name variable inside "then" and return it?

回答1:

You should return the promise instead.

getNameById (id) {
  return axios.get('/names/?ids=' + id)
      .then(response => {
        this.response = response.data
        return this.response[0].name
      })
  }

and use it:

getNameById(someId)
  .then(data => {
    // here you can access the data
  });

来源：https://stackoverflow.com/questions/44231366/how-to-set-variable-outside-axios-get