1627511 - "String contains an invalid character" even though all characters are valid

Status: NEW

(Core :: DOM: Core & HTML, enhancement)

Description

[Florine W. Dekker]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:74.0) Gecko/20100101 Firefox/74.0

Steps to reproduce:

Run atob("+") in the console.

Actual results:

I receive the error "InvalidCharacterError: String contains an invalid character". This is confusing because all characters in the string are valid base 64.

Expected results:

I should receive an error saying that the string is incorrectly encoded.

Comment 1

[Alin Ilea, Desktop Test Engineering]

Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:75.0) Gecko/20100101 Firefox/75.0

Hi,

I have manage to reproduced this using the Release version 75 and latest Nightly build 77.0a1.
In Chrome following the same steps the error received is:
"Uncaught DOMException: Failed to execute 'atob' on 'Window': The string to be decoded is not correctly encoded."

I will move this over to a component so developers can take a look over it. If this is not the correct component please feel free to change it to an appropriate one.

Thanks for the suggestion.

Comment 2

[André Bargull [:anba]]

Moving to "DOM: Core & HTML", because atob is an HTML function.