Initialize with the GNOME Typescript Template

types/ambient.d.ts

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+declare function _(id: string): string;
+declare function print(args: string): void;
+declare function log(obj: object, others?: object[]): void;
+declare function log(msg: string, subsitutions?: any[]): void;
+
+declare const pkg: {
+  version: string;
+  name: string;
+};
+
+declare module console {
+  export function error(obj: object, others?: object[]): void;
+  export function error(msg: string, subsitutions?: any[]): void;
+}
+
+declare interface String {
+  format(...replacements: string[]): string;
+  format(...replacements: number[]): string;
+}
+declare interface Number {
+  toFixed(digits: number): number;
+}

types/gettext.d.ts

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+export namespace Gettext {
+    export enum LocaleCategory {
+        CTYPE = 0,
+        NUMERIC = 1,
+        TIME = 2,
+        COLLATE = 3,
+        MONETARY = 4,
+        MESSAGES = 5,
+        ALL = 6,
+    }
+
+    export function setlocale(category: LocaleCategory, locale: string | null): string | null;
+    export function textdomain(domainName: string): void;
+    export function bindtextdomain(domainName: string, dirName: string): void;
+
+    export function gettext(msgid: string): string;
+    export function dgettext(domainName: string | null, msgid: string): string;
+    export function dcgettext(domainName: string | null, msgid: string, category: LocaleCategory): string;
+
+    export function ngettext(msgid1: string, msgid2: string, n: number): string;
+    export function dngettext(domainName: string | null, msgid1: string, msgid2: string, n: number): string;
+
+    export function pgettext(context: string | null, msgid: string): string;
+    export function dpgettext(domainName: string | null, context: string | null, msgid: string): string;
+
+    export class GettextObject {
+        gettext(msgid: string): string;
+        ngettext(msgid1: string, msgid2: string, n: number): string;
+        pgettext(context: string | null, msgid: string): string;
+    }
+
+    export function domain(domainName: string | null): GettextObject;
+}
+
+export default Gettext;