/
index.d.ts
395 lines (352 loc) · 11 KB
/
index.d.ts
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
import i18next, {
ReactOptions,
i18n,
ThirdPartyModule,
Resource,
TOptions,
StringMap,
TFunctionResult,
} from 'i18next';
import * as React from 'react';
type Subtract<T extends K, K> = Omit<T, keyof K>;
/**
* Due to a limitation/bug on typescript 4.1 (https://github.com/microsoft/TypeScript/issues/41406), we added
* "extends infer A ? A : never" in a few places to suppress the error "Type instantiation is excessively deep and possibly infinite."
* on cases where users have more than 22 namespaces. Once the issue is fixed, we can remove all instances of the workaround used.
*
* Reference of the bug reported: https://github.com/i18next/react-i18next/issues/1222
*/
/**
* This interface can be augmented by users to add types to `react-i18next` default resources.
*
* @deprecated use the `resources` key of `CustomTypeOptions` instead
*/
export interface Resources {}
/**
* This interface can be augmented by users to add types to `react-i18next`. It accepts a `defaultNS`, `resources`, `returnNull` and `returnEmptyString` properties.
*
* Usage:
* ```ts
* // react-i18next.d.ts
* import 'react-i18next';
* declare module 'react-i18next' {
* interface CustomTypeOptions {
* defaultNS: 'custom';
* returnNull: false;
* returnEmptyString: false;
* nsSeparator: ':';
* keySeparator: '.';
* jsonFormat: 'v4';
* allowObjectInHTMLChildren: false;
* resources: {
* custom: {
* foo: 'foo';
* };
* };
* }
* }
* ```
*/
export interface CustomTypeOptions {}
type MergeBy<T, K> = Omit<T, keyof K> & K;
type TypeOptions = MergeBy<
{
returnNull: true;
returnEmptyString: true;
keySeparator: '.';
nsSeparator: ':';
defaultNS: 'translation';
jsonFormat: 'v4';
resources: Resources;
allowObjectInHTMLChildren: false;
},
CustomTypeOptions
>;
type DefaultResources = TypeOptions['resources'];
type DefaultNamespace<T = TypeOptions['defaultNS']> = T extends Fallback<string> ? T : string;
type Fallback<F, T = keyof DefaultResources> = [T] extends [never] ? F : T;
export type Namespace<F = Fallback<string>> = F | F[];
export function setDefaults(options: ReactOptions): void;
export function getDefaults(): ReactOptions;
export function setI18n(instance: i18n): void;
export function getI18n(): i18n;
export const initReactI18next: ThirdPartyModule;
export function composeInitialProps(ForComponent: any): (ctx: unknown) => Promise<any>;
export function getInitialProps(): {
initialI18nStore: {
[ns: string]: {};
};
initialLanguage: string;
};
export interface ReportNamespaces {
addUsedNamespaces(namespaces: Namespace[]): void;
getUsedNamespaces(): string[];
}
declare module 'i18next' {
interface i18n {
reportNamespaces: ReportNamespaces;
}
}
type ObjectOrNever = TypeOptions['allowObjectInHTMLChildren'] extends true
? Record<string, unknown>
: never;
type ReactI18NextChild = React.ReactNode | ObjectOrNever;
declare module 'react' {
interface HTMLAttributes<T> {
children?: ReactI18NextChild | Iterable<ReactI18NextChild>;
}
}
type PluralSuffix = 'zero' | 'one' | 'two' | 'few' | 'many' | 'other';
type WithOrWithoutPlural<K> = TypeOptions['jsonFormat'] extends 'v4'
? K extends `${infer B}_${PluralSuffix}`
? B | K
: K
: K;
// Normalize single namespace
export type KeysWithSeparator<K1, K2, S extends string = TypeOptions['keySeparator']> = `${K1 &
string}${S}${K2 & string}`;
type KeysWithSeparator2<K1, K2> = KeysWithSeparator<K1, Exclude<K2, keyof any[]>>;
type Normalize2<T, K = keyof T> = K extends keyof T
? T[K] extends Record<string, any>
? T[K] extends readonly any[]
?
| KeysWithSeparator2<K, WithOrWithoutPlural<keyof T[K]>>
| KeysWithSeparator2<K, Normalize2<T[K]>>
:
| KeysWithSeparator<K, WithOrWithoutPlural<keyof T[K]>>
| KeysWithSeparator<K, Normalize2<T[K]>>
: never
: never;
type Normalize<T> = WithOrWithoutPlural<keyof T> | Normalize2<T>;
// Normalize multiple namespaces
type KeyWithNSSeparator<N, K, S extends string = TypeOptions['nsSeparator']> = `${N &
string}${S}${K & string}`;
type UnionToIntersection<U> = (U extends any ? (k: U) => void : never) extends (k: infer I) => void
? I
: never;
type LastOf<T> = UnionToIntersection<T extends any ? () => T : never> extends () => infer R
? R
: never;
type NormalizeMulti<T, U extends keyof T, L = LastOf<U>> = L extends U
? KeyWithNSSeparator<L, Normalize<T[L]>> | NormalizeMulti<T, Exclude<U, L>>
: never;
interface CustomTypeParameters {
returnNull?: boolean;
returnEmptyString?: boolean;
}
type TypeOptionsFallback<TranslationValue, Option, MatchingValue> = Option extends false
? TranslationValue extends MatchingValue
? string
: TranslationValue
: TranslationValue;
/**
* Checks if user has enabled `returnEmptyString` and `returnNull` options to retrieve correct values.
*/
export type NormalizeByTypeOptions<
TranslationValue,
Options extends CustomTypeParameters = TypeOptions,
R = TypeOptionsFallback<TranslationValue, Options['returnEmptyString'], ''>
> = TypeOptionsFallback<R, Options['returnNull'], null>;
type StringIfPlural<T> = TypeOptions['jsonFormat'] extends 'v4'
? T extends `${string}_${PluralSuffix}`
? string
: never
: never;
type NormalizeReturn<
T,
V,
S extends string | false = TypeOptions['keySeparator']
> = V extends keyof T
? NormalizeByTypeOptions<T[V]>
: S extends false
? V
: V extends `${infer K}${S}${infer R}`
? K extends keyof T
? NormalizeReturn<T[K], R>
: never
: StringIfPlural<keyof T>;
type NormalizeMultiReturn<T, V> = V extends `${infer N}:${infer R}`
? N extends keyof T
? NormalizeReturn<T[N], R>
: never
: never;
type NormalizeWithKeyPrefix<
T,
K,
S extends string = TypeOptions['keySeparator']
> = K extends `${infer K1}${S}${infer K2}`
? K1 extends keyof T
? NormalizeWithKeyPrefix<T[K1], K2>
: never
: K extends keyof T
? T[K] extends string
? never
: Normalize<T[K]>
: never;
type KeyPrefix<N extends Namespace> =
| (N extends keyof DefaultResources ? Normalize<DefaultResources[N]> : string)
| undefined;
export type TFuncKey<
N extends Namespace = DefaultNamespace,
TKPrefix = undefined,
T = DefaultResources
> = N extends (keyof T)[] | Readonly<(keyof T)[]>
? NormalizeMulti<T, N[number]>
: N extends keyof T
? TKPrefix extends undefined
? Normalize<T[N]>
: NormalizeWithKeyPrefix<T[N], TKPrefix>
: string;
export type TFuncReturn<
N,
TKeys,
TDefaultResult,
TKPrefix = undefined,
T = DefaultResources
> = N extends (keyof T)[]
? NormalizeMultiReturn<T, TKeys>
: N extends keyof T
? TKPrefix extends undefined
? NormalizeReturn<T[N], TKeys>
: NormalizeReturn<T[N], KeysWithSeparator<TKPrefix, TKeys>>
: Fallback<TDefaultResult>;
export interface TFunction<N extends Namespace = DefaultNamespace, TKPrefix = undefined> {
<
TKeys extends TFuncKey<N, TKPrefix> | TemplateStringsArray extends infer A ? A : never,
TDefaultResult extends TFunctionResult | React.ReactNode = string,
TInterpolationMap extends object = StringMap
>(
key: TKeys | TKeys[],
options?: TOptions<TInterpolationMap> | string,
): TFuncReturn<N, TKeys, TDefaultResult, TKPrefix>;
<
TKeys extends TFuncKey<N, TKPrefix> | TemplateStringsArray extends infer A ? A : never,
TDefaultResult extends TFunctionResult | React.ReactNode = string,
TInterpolationMap extends object = StringMap
>(
key: TKeys | TKeys[],
defaultValue?: string,
options?: TOptions<TInterpolationMap> | string,
): TFuncReturn<N, TKeys, TDefaultResult, TKPrefix>;
}
type TransChild = React.ReactNode | Record<string, unknown>;
export type TransProps<
K extends TFuncKey<N, TKPrefix> extends infer A ? A : never,
N extends Namespace = DefaultNamespace,
TKPrefix = undefined,
E = React.HTMLProps<HTMLDivElement>
> = E & {
children?: TransChild | TransChild[];
components?: readonly React.ReactElement[] | { readonly [tagName: string]: React.ReactElement };
count?: number;
context?: string;
defaults?: string;
i18n?: i18n;
i18nKey?: K | K[];
ns?: N;
parent?: string | React.ComponentType<any> | null; // used in React.createElement if not null
tOptions?: {};
values?: {};
shouldUnescape?: boolean;
t?: TFunction<N, TKPrefix>;
};
export function Trans<
K extends TFuncKey<N, TKPrefix> extends infer A ? A : never,
N extends Namespace = DefaultNamespace,
TKPrefix extends KeyPrefix<N> = undefined,
E = React.HTMLProps<HTMLDivElement>
>(props: TransProps<K, N, TKPrefix, E>): React.ReactElement;
export function useSSR(initialI18nStore: Resource, initialLanguage: string): void;
export interface UseTranslationOptions<TKPrefix = undefined> {
i18n?: i18n;
useSuspense?: boolean;
keyPrefix?: TKPrefix;
}
export type UseTranslationResponse<N extends Namespace, TKPrefix = undefined> = [
TFunction<N, TKPrefix>,
i18n,
boolean,
] & {
t: TFunction<N, TKPrefix>;
i18n: i18n;
ready: boolean;
};
export function useTranslation<
N extends Namespace = DefaultNamespace,
TKPrefix extends KeyPrefix<N> = undefined
>(
ns?: N | Readonly<N>,
options?: UseTranslationOptions<TKPrefix>,
): UseTranslationResponse<N, TKPrefix>;
// Need to see usage to improve this
export function withSSR(): <Props>(
WrappedComponent: React.ComponentType<Props>,
) => {
({
initialI18nStore,
initialLanguage,
...rest
}: {
initialI18nStore: Resource;
initialLanguage: string;
} & Props): React.FunctionComponentElement<Props>;
getInitialProps: (ctx: unknown) => Promise<any>;
};
export interface WithTranslation<
N extends Namespace = DefaultNamespace,
TKPrefix extends KeyPrefix<N> = undefined
> {
t: TFunction<N, TKPrefix>;
i18n: i18n;
tReady: boolean;
}
export interface WithTranslationProps {
i18n?: i18n;
useSuspense?: boolean;
}
export function withTranslation<
N extends Namespace = DefaultNamespace,
TKPrefix extends KeyPrefix<N> = undefined
>(
ns?: N,
options?: {
withRef?: boolean;
keyPrefix?: TKPrefix;
},
): <
C extends React.ComponentType<React.ComponentProps<any> & WithTranslationProps>,
ResolvedProps = JSX.LibraryManagedAttributes<
C,
Subtract<React.ComponentProps<C>, WithTranslationProps>
>
>(
component: C,
) => React.ComponentType<Omit<ResolvedProps, keyof WithTranslation<N>> & WithTranslationProps>;
export interface I18nextProviderProps {
children?: React.ReactNode;
i18n: i18n;
defaultNS?: string;
}
export const I18nextProvider: React.FunctionComponent<I18nextProviderProps>;
export const I18nContext: React.Context<{ i18n: i18n }>;
export interface TranslationProps<
N extends Namespace = DefaultNamespace,
TKPrefix extends KeyPrefix<N> = undefined
> {
children: (
t: TFunction<N, TKPrefix>,
options: {
i18n: i18n;
lng: string;
},
ready: boolean,
) => React.ReactNode;
ns?: N;
i18n?: i18n;
useSuspense?: boolean;
keyPrefix?: TKPrefix;
}
export function Translation<
N extends Namespace = DefaultNamespace,
TKPrefix extends KeyPrefix<N> = undefined
>(props: TranslationProps<N, TKPrefix>): any;