goog.labs.net.webChannel.environment
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A single module to define user-agent specific environment details.
Exported Functions
getPollingInterval() → (number|undefined)
(number|undefined)How often to poll (in MS) for changes to responseText in browsers that don't fire onreadystatechange during incremental loading of the response body.
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isPollingRequired() → boolean
booleanHistory:
IE11 is still using Trident, the traditional engine for IE. Edge is using EdgeHTML, a fork of Trident. We are seeing the same issue on IE-11 (reported in 2017), so treat IE the same as Edge for now.
We used to do polling for Opera (only) with an 250ms interval, because Opera only fires readyState == INTERACTIVE once. Opera switched to WebKit in 2013, and then to Blink (chrome).
TODO(user): check the raw UA string to keep polling for old, mobile operas that may still be affected. For old Opera, double the polling interval to 250ms.
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startOriginTrials( path, logError ) → void
voidFor Fetch/upload OT, make three requests against the server endpoint. POST requests contain only dummy payload.
https://developers.chrome.com/origintrials/#/view_trial/3524066708417413121
This function is expected to be called from background during the handshake. Exceptions will be logged by the caller.
No stats or logs are collected on the client-side. To be disabled once the OT is expired.
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