Axios this points to the undefined problem

A pit to meet today.

It needs to be judged by this value when it gets the value returned by the interface.

Take it for granted that you want to use this. $router. Push ("/verifynumber"); to jump, but found that there is nothing to use console.log this discovery is undefined. Later found to use this directly in Axios, Pointing to the previous is not the same, there are a lot of solutions on the Web, including the use of arrow functions. And I used to define let at the beginning of the function. = This to save this, and then use that in the subsequent code directly.

Axios this points to the undefined problem