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fix(types): support inferring inject #12964

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2 changes: 1 addition & 1 deletion types/common.d.ts
Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@ export type UnionToIntersection<U> = (
) extends (k: infer I) => void
? I
: never

// Conditional returns can enforce identical types.
// See here: https://github.com/Microsoft/TypeScript/issues/27024#issuecomment-421529650
// prettier-ignore
Expand Down
28 changes: 21 additions & 7 deletions types/options.d.ts
Original file line number Diff line number Diff line change
Expand Up @@ -174,7 +174,9 @@ export interface ComponentOptions<
Props = DefaultProps,
RawBindings = {},
Mixin extends ComponentOptionsMixin = ComponentOptionsMixin,
Extends extends ComponentOptionsMixin = ComponentOptionsMixin
Extends extends ComponentOptionsMixin = ComponentOptionsMixin,
Inject extends InjectOptions = {},
InjectNames extends string = string,
> {
data?: Data
props?: PropsDef
Expand Down Expand Up @@ -225,7 +227,7 @@ export interface ComponentOptions<
filters?: { [key: string]: Function }

provide?: object | (() => object)
inject?: InjectOptions
inject?: Inject | InjectNames[]

model?: {
prop?: string
Expand Down Expand Up @@ -342,8 +344,20 @@ export interface DirectiveOptions {

export type InjectKey = string | symbol

export type InjectOptions =
| {
[key: string]: InjectKey | { from?: InjectKey; default?: any }
}
| string[]
export type InjectOptions = string[] | ObjectInjectOptions

type ObjectInjectOptions = Record<
InjectKey,
string | symbol | { from?: string | symbol; default?: unknown }
>

export type InjectToObject<T extends InjectOptions> =
T extends string[]
? {
[K in T[number]]?: unknown
}
: T extends ObjectInjectOptions
? {
[K in keyof T]?: unknown
}
: never
207 changes: 207 additions & 0 deletions types/test/v3/define-component-test.tsx
Original file line number Diff line number Diff line change
Expand Up @@ -1225,3 +1225,210 @@ describe('should report non-existent properties in instance', () => {
// @ts-expect-error
instance2.foo
})


describe('inject', () => {
test('with object inject', () => {
defineComponent({
props: {
a: String
},
inject: {
foo: 'foo',
bar: 'bar',
},
created() {
expectType<unknown>(this.foo)
expectType<unknown>(this.bar)
// @ts-expect-error
expectError(this.foobar = 1)
}
})
})

test('with array inject', () => {
defineComponent({
props: ['a', 'b'],
inject: ['foo', 'bar'],
created() {
expectType<unknown>(this.foo)
expectType<unknown>(this.bar)
// @ts-expect-error
expectError(this.foobar = 1)
}
})
})

test('with no props', () => {
defineComponent({
inject: {
foo: {
from: 'pfoo',
default: 'foo'
},
bar: {
from: 'pbar',
default: 'bar'
},
},
created() {
expectType<unknown>(this.foo)
expectType<unknown>(this.bar)
// @ts-expect-error
expectError(this.foobar = 1)
}
})
})

test('without inject', () => {
defineComponent({
props: ['a', 'b'],
created() {
// @ts-expect-error
expectError(this.foo = 1)
// @ts-expect-error
expectError(this.bar = 1)
}
})
})

test('define mixins w/ no props', () => {
const MixinA = defineComponent({
inject: {
foo: 'foo'
},
})
const MixinB = defineComponent({
inject: ['bar'],
})
// with no props
defineComponent({
mixins: [MixinA, MixinB],
created() {
expectType<unknown>(this.foo)
expectType<unknown>(this.bar)
}
})
// with object props
defineComponent({
mixins: [MixinA, MixinB],
props: {
baz: {
type: Number,
required: true
}
},
created() {
expectType<unknown>(this.foo)
expectType<unknown>(this.bar)
expectType<number>(this.baz)
}
})
// with array props
defineComponent({
mixins: [MixinA, MixinB],
props: ['baz'],
created() {
expectType<unknown>(this.foo)
expectType<unknown>(this.bar)
expectType<any>(this.baz)
}
})
})

test('define mixins w/ object props', () => {
const MixinA = defineComponent({
props: {
a: String
},
inject: {
foo: 'foo'
},
})
const MixinB = defineComponent({
props: {
b: String
},
inject: ['bar'],
})
// with no props
defineComponent({
mixins: [MixinA, MixinB],
created() {
expectType<unknown>(this.foo)
expectType<unknown>(this.bar)
}
})
// with object props
defineComponent({
mixins: [MixinA, MixinB],
props: {
baz: {
type: Number,
required: true
}
},
created() {
expectType<unknown>(this.foo)
expectType<unknown>(this.bar)
expectType<number>(this.baz)
}
})
// with array props
defineComponent({
mixins: [MixinA, MixinB],
props: ['baz'],
created() {
expectType<unknown>(this.foo)
expectType<unknown>(this.bar)
expectType<any>(this.baz)
}
})
})

test('define mixins w/ array props', () => {
const MixinA = defineComponent({
props: ['a'],
inject: {
foo: 'foo'
},
})
const MixinB = defineComponent({
props: ['b'],
inject: ['bar'],
})
// with no props
defineComponent({
mixins: [MixinA, MixinB],
created() {
expectType<unknown>(this.foo)
expectType<unknown>(this.bar)
}
})
// with object props
defineComponent({
mixins: [MixinA, MixinB],
props: {
baz: {
type: Number,
required: true
}
},
created() {
expectType<unknown>(this.foo)
expectType<unknown>(this.bar)
expectType<number>(this.baz)
}
})
// with array props
defineComponent({
mixins: [MixinA, MixinB],
props: ['baz'],
created() {
expectType<unknown>(this.foo)
expectType<unknown>(this.bar)
expectType<any>(this.baz)
}
})
})
})
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