If someone in 2021 trying the Primitive version or ES6 version, for some reason the execution never gets to catch unless you add the processing of the success before it: so instead of
return fetch(url, options).catch(function(error)
you absolutely necessarily need to do return fetch(url, options).then(res => res.json()).catch(function(error)
or whatever processing of response you want to do in that .then()
you can still do next .then down the line from what fetch_retry returns you afterwards
But without this then fetch_retry doesn't actually attempt any retries as it never gets to catch, even though it got 500 server error in my case.
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If someone in 2021 trying the Primitive version or ES6 version, for some reason the execution never gets to catch unless you add the processing of the success before it: so instead of
return fetch(url, options).catch(function(error)you absolutely necessarily need to do
return fetch(url, options).then(res => res.json()).catch(function(error)or whatever processing of response you want to do in that .then()
you can still do next .then down the line from what fetch_retry returns you afterwards
But without this then fetch_retry doesn't actually attempt any retries as it never gets to catch, even though it got 500 server error in my case.