decode jwt token without library

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Brianna
03 May 2020
1let b64DecodeUnicode = str =>
2  decodeURIComponent(
3    Array.prototype.map.call(atob(str), c =>
4      '%' + ('00' + c.charCodeAt(0).toString(16)).slice(-2)
5    ).join(''))
6
7let parseJwt = token =>
8  JSON.parse(
9    b64DecodeUnicode(
10      token.split('.')[1].replace('-', '+').replace('_', '/')
11    )
12  )