Alas, none had done it -- until yesterday, when Amazon announced their AWS SDK for JavaScript in the Browser. Theoretically, it does for their web services, what Dropbox did for theirs.

Exclusive A massive online heist targeting AWS customers during which digital crooks abused misconfigurations in public websites and stole source code, thousands of credentials, and other secrets ...

Hundreds of mobile apps have been found to be leaking Amazon Web Services (AWS) credentials. A recent Symantec analysis identified 1,859 publicly available apps, 98% of which are iOS apps ...

A major operation seeking exposed credentials of Amazon Web Services (AWS) customers has been discovered, with hackers scanning millions of websites and exfiltrating sensitive data from thousands ...

The SDK supports Amazon’s web identity federation feature (you wouldn’t want to add your AWS credentials in your HTML and JavaScript, after all).

AWS customers were hit by a major cyberattack, resulting in stolen credentials being stored in plain sight due to misconfigured sites.