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NGXS - action interceptors

Is it possible to intercept/preprocess actions before they will be processed by the state? Thought I could achieve this with action handlers

The action handler is an Observable that receives all the actions dispatched before the state takes any action on it.

https://ngxs.gitbook.io/ngxs/advanced/action-handlers

But looks like action handlers (including 'dispatched') are invoked after @Action methods actually.

Solution

  • If the action stream is not providing what you need, and if you want to intercept all actions prior to them being processed you could consider writing a NGXS Plugin.

    The NGXS source for the LoggerPluginModule is pretty simple if you are looking for an example of a plugin.