VueJS get data as object

I think what you are looking for is to return the whole data object, like this:

log() {
  console.log(this.$data);
}

You can access the current component's data object using this.$data.

Reference: Link

So the log function should be like:

log() {
  console.log(this.$data.a);
  console.log(this.$data.b);
  console.log(this.$data.foo);
}