Add TypeScript definitions

index.d.ts

@@ -0,0 +1,46 @@
+declare module 'loggy' {
+  type Level = 'error' | 'warn' | 'log' | 'info' | 'success';
+
+  interface Logger {
+    /** logs messages in red to stderr, creates notification. */
+    error(...args: any[]);
+
+    /** logs messages in yellow to stdout. */
+    warn(...args: any[]);
+
+    /** logs messages in red to stderr, creates notification. */
+    log(...args: any[]);
+
+    /** logs messages in green to stdout. */
+    info(...args: any[]);
+
+    /** logs messages in green to stdout. */
+    success: Logger['info'];
+
+    /** function that does color and date formatting. */
+    format(level: string);
+
+    /** `false`, changes to `true` if any error was logged. */
+    readonly errorHappened: boolean;
+
+    /**
+     * Mapping of log levels to colors.
+     * Can be `object`, like `{error: 'red', log: 'cyan'}` or `false` (disables colors). */
+    colors: Record<Level, 'string'> | false;
+
+    /**
+     * As `Boolean`, enables or disables notifications for errors, or as `Array`,
+     * list types to trigger notifications, like `['error', 'warn', 'success']`.
+     */
+    notifications: boolean | Level[];
+
+    /** String, optional, prepends title in notifications */
+    notificationsTitle: string;
+
+    dumpStacks: boolean | Level;
+  }
+
+  const logger: Logger;
+
+  export = logger;
+}