Features

• Support for debugging Vuex in a NativeScript application with the standalone Vue Devtools app (#1404)
• New ES modules build for browser (#1533): vuex.esm.browser.js and vuex.esm.browser.min.js

Improvements

• Improved jsdelivr support (#1496)

Fixed

• Memory leak happening while using registerModule/unregisterModule (#1508)
• Typings: Make mutation and action payload optional in definition file (#1517)

Features

• store.subscribeAction can now specify whether the handler should be invoked before the action, after the action, or both. 76818c1 (#1115 by @wa3l)

Improvements

• Errors thrown inside action subscribers no longer cause the entire action to fail.

Fixed

• Type compatibility with TypeScript 2.6

Breaking Changes

This major release only breaks backwards compatibility if you use TypeScript.

• TypeScript type declarations have been updated to be compatible with Vue core 2.5+ and no longer work with 2.4 and below.

• All type declarations are now exported using ES-style exports, and must be imported using ES modules syntax:

  import { Store } from 'vuex'

New

• store.registerModule can now be called while preserving current state if the module is already registered, by passing a 3rd argument as { preserveState: true }. Useful in server-side rendering.

• New method: store.subscribeAction() - similar to store.subscribe, but for actions instead.

• Namespaced modules can now also register global actions using the following syntax:

  const module = {
   actions: {
   rootAction: {
   root: true,
   handler: () => {}
   } 
   }
  }

• The createLogger function now also accepts a logger option, allowing the user to provide a custom implementation of the console object to be used when logging.

Fixed

• Allow installation on different copies of Vue for testing purposes
• Fix #731 by moving auto installation code into the store constructor (#914)

New

• New helper method createNamespacedHelpers: a helper-generator that generates namespaced mapXXX helpers for you:

  const { mapState, mapActions } = createNamespacedHelpers('some/nested/module')
  // everything generated by mapState and mapActions are bound to the module.

  See docs for more info.

  (@riophae via #800)

Misc

• Various typing and assertion improvements.

• Modules can now declare state using a function - this allows the same module definition to be reused (e.g. multiple times in the same store, or in multiple stores)

• Now exposes ES module build by default for webpack 2 and rollup.

Fixed

• #524 avoid firing unrelated watchers when calling registerModule (@ktsn)
• #528 ensure module local state always refers to actual state (@ktsn)