How to decode jwt token in javascript without using a library?

#short
#javascript
#jwt
How can I decode the payload of JWT using JavaScript? Without a library. So the token just returns a payload object that can consumed by my front-end app.
Example token: xxxxxxxxx.XXXXXXXX.xxxxxxxx
And the result is the payload:
{exp: 10012016 name: john doe, scope:['admin']}

Видео How to decode jwt token in javascript without using a library? канала Code Samples