https://stackoverflow.com/questions/55205006/how-can-we-access-hyphen-included-data-from-the-json-response

solution-of-an-stackoverflow-q.md

Use the below statement as others suggested.

family._embedded['wp:featuredmedia']['0'].media_details.sizes["family-profile-thumb"].source_url

The below example clarifies when to use . (dot) & [] (brackets).

Creating an object

> o = {
... "fullname": "Rishikesh Agrawani",
... age: 26,
... langs: ["C", "Python", "JavaScript"],
... "web-lang": "JavaScript",
... "family-profile-thumb": "Yes"
... }
{ fullname: 'Rishikesh Agrawani',
  age: 26,
  langs: [ 'C', 'Python', 'JavaScript' ],
  'web-lang': 'JavaScript',
  'family-profile-thumb': 'Yes' }
> 

Access fullname (in 2 ways)

> o.fullname
'Rishikesh Agrawani'
> 
> o["fullname"]
'Rishikesh Agrawani'
> 

Access web-lang (only 1 way) otherwise you will get an error if you use . notation

> o["web-lang"]   // if there are spaces, hyphens (as we see in variable naming), don't use `.`(dot), use `[]` (brackets)
'JavaScript'
> 
> o.web-lang
Thrown:
ReferenceError: lang is not defined
>