Github user MikaelSoderstrom commented on the pull request: https://github.com/apache/couchdb/pull/153#issuecomment-35506289 Ahh, forgot that Windows 7 was shipped with IE 8. Well, then I guess there must be support for it. I still suggest that ES5 shim and similar should be used where the browser doesn't support a specific API. If the user is using any of the modern browsers, they should get the best experience possible, while users with older browsers should still be able to use it. Mixing different frameworks just because you can could easily lead to confused developers in the end. ECMAScript 5th Edition has this indexOf function, and since it´s possible to shim it, I don't see any reason for why anything else should be used.
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