event.detail.successful always true with hx-on:after-request when allowing all responses status to swap

[Kabzns]

The Problem:

allowing all responses status to swap:
<meta name="htmx-config" content='{"responseHandling": [{"code":"...", "swap": true}]}'>
Listen to hx-on:after-request on an element:
<form hx-on::after-request='if(event.detail.successful) { doSome() }>
event.detail.successful is always true, even for error (not 2xx status) responses

From the ::afterRequest Doc:

detail.successful - true if the response has a 20x status code or is marked detail.isError = false in the htmx:beforeSwap event, else false

Doesn't mention that allowing all responses status to swap will also mark the response as successful?

[MichaelWest22]

Yeah this is because custom responseHandling is a new optional feature that is just designed to override the default allow 2xx's only to swap without errors behaviour. If you override the default of what is defined as successful to swap then you would expect this to flow though. before responseHandling was added as an option you would have to modify the event in beforeSwap to get the same behaviour.