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ComponentInternalInstance,
currentInstance,
isInSSRComponentSetup,
LifecycleHooks,
setCurrentInstance,
unsetCurrentInstance
} from './component'
import { ComponentPublicInstance } from './componentPublicInstance'
import { callWithAsyncErrorHandling, ErrorTypeStrings } from './errorHandling'
import { warn } from './warning'
import { toHandlerKey } from '@vue/shared'
import { DebuggerEvent, pauseTracking, resetTracking } from '@vue/reactivity'
export { onActivated, onDeactivated } from './components/KeepAlive'
export function injectHook(
type: LifecycleHooks,
hook: Function & { __weh?: Function },
target: ComponentInternalInstance | null = currentInstance,
prepend: boolean = false
): Function | undefined {
if (target) {
const hooks = target[type] || (target[type] = [])
// cache the error handling wrapper for injected hooks so the same hook
// can be properly deduped by the scheduler. "__weh" stands for "with error
// handling".
const wrappedHook =
hook.__weh ||
(hook.__weh = (...args: unknown[]) => {
Iif (target.isUnmounted) {
return
}
// disable tracking inside all lifecycle hooks
// since they can potentially be called inside effects.
pauseTracking()
// Set currentInstance during hook invocation.
// This assumes the hook does not synchronously trigger other hooks, which
// can only be false when the user does something really funky.
setCurrentInstance(target)
const res = callWithAsyncErrorHandling(hook, target, type, args)
unsetCurrentInstance()
resetTracking()
return res
})
if (prepend) {
hooks.unshift(wrappedHook)
} else {
hooks.push(wrappedHook)
}
return wrappedHook
} else IEif (__DEV__) {
const apiName = toHandlerKey(ErrorTypeStrings[type].replace(/ hook$/, ''))
warn(
`${apiName} is called when there is no active component instance to be ` +
`associated with. ` +
`Lifecycle injection APIs can only be used during execution of setup().` +
(__FEATURE_SUSPENSE__
? ` If you are using async setup(), make sure to register lifecycle ` +
`hooks before the first await statement.`
: ``)
)
}
}
export const createHook =
<T extends Function = () => any>(lifecycle: LifecycleHooks) =>
(hook: T, target: ComponentInternalInstance | null = currentInstance) =>
// post-create lifecycle registrations are noops during SSR (except for serverPrefetch)
(!isInSSRComponentSetup || lifecycle === LifecycleHooks.SERVER_PREFETCH) &&
injectHook(lifecycle, hook, target)
export const onBeforeMount = createHook(LifecycleHooks.BEFORE_MOUNT)
export const onMounted = createHook(LifecycleHooks.MOUNTED)
export const onBeforeUpdate = createHook(LifecycleHooks.BEFORE_UPDATE)
export const onUpdated = createHook(LifecycleHooks.UPDATED)
export const onBeforeUnmount = createHook(LifecycleHooks.BEFORE_UNMOUNT)
export const onUnmounted = createHook(LifecycleHooks.UNMOUNTED)
export const onServerPrefetch = createHook(LifecycleHooks.SERVER_PREFETCH)
export type DebuggerHook = (e: DebuggerEvent) => void
export const onRenderTriggered = createHook<DebuggerHook>(
LifecycleHooks.RENDER_TRIGGERED
)
export const onRenderTracked = createHook<DebuggerHook>(
LifecycleHooks.RENDER_TRACKED
)
export type ErrorCapturedHook<TError = unknown> = (
err: TError,
instance: ComponentPublicInstance | null,
info: string
) => boolean | void
export function onErrorCaptured<TError = Error>(
hook: ErrorCapturedHook<TError>,
target: ComponentInternalInstance | null = currentInstance
) {
injectHook(LifecycleHooks.ERROR_CAPTURED, hook, target)
}
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