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[IMP] hooks: introduce useChildSubEnv and change useSubEnv

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Géry Debongnie
2022-01-24 14:39:12 +01:00
committed by Aaron Bohy
parent e4b4ee471f
commit aa95149997
8 changed files with 183 additions and 31 deletions
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CHANGELOG.md
+7 -10
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@@ -73,6 +73,8 @@ All changes are documented here in no particular order.
- new `useEffect` hook ([doc](doc/reference/hooks.md#useeffect))
- breaking: `Context` is removed ([details](#15-context-is-removed))
- breaking: `env` is now totally empty ([details](#16-env-is-now-totally-empty))
- breaking: `env` is now frozen ([details](#28-env-is-now-frozen))
- new hook: `useChildSubEnv` (only applies to child components) ([details](#27-usechildsubenv-only-applies-to-child-components))
- breaking: most exports are exported at top level ([details](#18-most-exports-are-exported-at-top-level))
- breaking: properties are no longer set as attributes ([details](#19-properties-are-no-longer-set-as-attributes))
- breaking: `EventBus` api changed: it is now an `EventTarget` ([details](#21-eventbus-api-changed-it-is-now-an-eventtarget))
@@ -81,8 +83,6 @@ All changes are documented here in no particular order.
- breaking: transition system is removed ([details](#24-transition-system-is-removed))
- breaking: no more global components or templates ([details](#25-no-more-global-components-or-templates))
- breaking: `AsyncRoot` utility component is removed ([details](#26-asyncroot-utility-component-is-removed))
- breaking: `useSubEnv` only applies to child components ([details](#27-usesubenv-only-applies-to-child-components))
- breaking: `env` is now frozen ([details](#28-env-is-now-frozen))
- breaking: `renderToString` function on qweb has been removed ([details](#32-rendertostring-on-qweb-has-been-removed))
- breaking: `debounce` utility function has been removed ([details](#34-debounce-utility-function-has-been-removed))
- breaking: `browser` object has been removed ([details](#39-browser-object-has-been-removed))
@@ -565,15 +565,12 @@ either a fallback when the data is not ready, or the actual component with data
as props. If there is no escape, and `AsyncRoot` is needed, please reach out to
us so we can study this usecase.
### 27. `useSubEnv` only applies to child components
### 27. `useChildSubEnv` (only applies to child components)
In Owl 1, a call to `useSubEnv` would define a new environment for the children
AND the component. It now only defines an environment for the children.
Rationale: This was a subtle cause for bugs: some code had to be rrun
before the call to `useSubEnv`, otherwise it could interfere with the sub environment.
Documentation: [Hooks](doc/reference/hooks.md#usesubenv)
In Owl, a call to `useSubEnv` would define a new environment for the children
AND the component. It is very useful, but in some cases, one only need to update
the children component environment. This can now be done with a new hook:
[`useChildSubEnv`](doc/reference/hooks.md#usesubenv-and-usechildsubenv)
### 28. `env` is now frozen