Google Place Autocomplete - 几何边界属性

Question

I cannot find this answer in the Google docs so I am posting my question here.

As per the Google Places Autocomplete response docs , bounds is one of the returned fields.

However, when console logging bounds in the browser, the object has strangely named keys such as Ba , Ab , Ra and so on..

Furthermore, I have noticed that these keys change overtime.

For example, the following code might fail within a few days. In the initial search for say, New York, bounds.Ab.g may contain a number value.

however, after a few days bounds.Ab.g might become bounds.Bb.g and the original value will be undefined .

import PlacesAutocomplete, { geocodeByAddress } from 'react-places-autocomplete'

const GooglePlacesSearchBar = () => {

  const handleSelect = async userInput => {
    const result = await geocodeByAddress(userInput)
    const { place_id, geometry, formatted_address } = result[0]
    const { bounds } = geometry

    const swBounds = [bounds.Ab.g, bounds.Ra.g]
    const neBounds = [bounds.Ab.h, bounds.Ra.h]
    ...

  }

This is an example of the bounds object printed in console.

    bounds: _.Wf
      Bb: Vf
        g: 49.19817700000001
        h: 49.3172939
      [[Prototype]]: Object
      Ra: Qf
        g: -123.22474
        h: -123.023068

Could anyone point to a doc or explain what these keys stand for and why they keep changing?

Answer 1

thanks to @geocodezip for the answers in the comments section.

I also realized that if I JSON.strigify the result, then the "undocumented" properties are solved to human-readable props.

Strange decision by Google indeed.