theluyuan/vue3-yuanma
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

feat(runtime-core): warn async data()

Browse Source
This commit is contained in:
Evan You 2020-04-14 17:40:41 -04:00
parent 78977c3997
commit 3e7bb7d110
1 changed files with 9 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
packages/runtime-core/src/componentOptions.ts
View File

@ -15,7 +15,8 @@ import {
isArray, isArray,
EMPTY_OBJ, EMPTY_OBJ,
NOOP, NOOP,
hasOwn hasOwn,
isPromise
} from '@vue/shared' } from '@vue/shared'
import { computed } from './apiComputed' import { computed } from './apiComputed'
import { watch, WatchOptions, WatchCallback } from './apiWatch' import { watch, WatchOptions, WatchCallback } from './apiWatch'
@ -316,6 +317,13 @@ export function applyOptions(
) )
} }
const data = dataOptions.call(ctx, ctx) const data = dataOptions.call(ctx, ctx)
if (__DEV__ && isPromise(data)) {
warn(
`data() returned a Promise - note data() cannot be async; If you ` +
`intend to perform data fetching before component renders, use ` +
`async setup() + <Suspense>.`
)
}
if (!isObject(data)) { if (!isObject(data)) {
__DEV__ && warn(`data() should return an object.`) __DEV__ && warn(`data() should return an object.`)
} else if (instance.data === EMPTY_OBJ) { } else if (instance.data === EMPTY_OBJ) {