How i can set/change variable in catch error axios?

If i try set variable in vue2 when axios error i get this: Uncaught (in promise) TypeError: Cannot set properties of undefined (setting ‘snackbar’)

            axios.post('/testaxios', {
            }).then(response => {
                console.log(response.data);
            }).catch(function (error) {
                console.error(error);
                this.snackbar = true;
            });

data() {
        return {
            snackbar: false,
        }
}

>Solution :

You either need to bind the catch function to the this context:

catch(function(error) {
  console.error(error);
  this.snackbar = true;
}).bind(this);

Or simply use an arrow function (which does the binding automatically):

catch((error) => {
  console.error(error);
  this.snackbar = true;
});