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Improve type safety

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This commit is contained in:
shilangyu 2021-03-01 21:33:57 +01:00
parent 19c0223b79
commit 66cc9416e4
2 changed files with 15 additions and 9 deletions
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18
generate_translations.js
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@ -32,17 +32,17 @@ const baseLanguage = "en";
fs.readFile(`${translationDir}${baseLanguage}.json`, "utf8", (_, fileStr) => { fs.readFile(`${translationDir}${baseLanguage}.json`, "utf8", (_, fileStr) => {
const keys = Object.keys(JSON.parse(fileStr)); const keys = Object.keys(JSON.parse(fileStr));
const data = `import * as i18n from "i18next"; const data = `import { i18n } from "i18next";
type I18nKeys =
${keys.map(key => ` | "${key}"`).join("\n")};
declare module "i18next" { declare module "i18next" {
export interface TFunction { export type I18nKeys =
${keys.map(key => ` | "${key}"`).join("\n")};
export interface TFunctionTyped {
// basic usage // basic usage
< <
TResult extends TFunctionResult = string, TResult extends TFunctionResult = string,
TInterpolationMap extends object = StringMap TInterpolationMap extends Record<string, unknown> = StringMap
>( >(
key: I18nKeys | I18nKeys[], key: I18nKeys | I18nKeys[],
options?: TOptions<TInterpolationMap> | string options?: TOptions<TInterpolationMap> | string
@ -50,13 +50,17 @@ declare module "i18next" {
// overloaded usage // overloaded usage
< <
TResult extends TFunctionResult = string, TResult extends TFunctionResult = string,
TInterpolationMap extends object = StringMap TInterpolationMap extends Record<string, unknown> = StringMap
>( >(
key: I18nKeys | I18nKeys[], key: I18nKeys | I18nKeys[],
defaultValue?: string, defaultValue?: string,
options?: TOptions<TInterpolationMap> | string options?: TOptions<TInterpolationMap> | string
): TResult; ): TResult;
} }
export interface i18nTyped extends i18n {
t: TFunctionTyped;
}
} }
`; `;

6
src/shared/i18next.ts
View file

@ -1,4 +1,4 @@
import i18next from "i18next"; import i18next, { i18nTyped } from "i18next";
import { getLanguage } from "./utils"; import { getLanguage } from "./utils";
import { en } from "./translations/en"; import { en } from "./translations/en";
import { el } from "./translations/el"; import { el } from "./translations/el";
@ -82,4 +82,6 @@ i18next.init({
interpolation: { format }, interpolation: { format },
}); });
export { i18next as i18n, resources }; export const i18n = i18next as i18nTyped;
export { resources };