diff --git a/types/javascript-time-ago/OTHER_FILES.txt b/types/javascript-time-ago/OTHER_FILES.txt
index 5986a14d5e..5298783a92 100644
--- a/types/javascript-time-ago/OTHER_FILES.txt
+++ b/types/javascript-time-ago/OTHER_FILES.txt
@@ -128,4 +128,4 @@ locale/gu/index.d.ts
 locale/ms/index.d.ts
 locale/ro/index.d.ts
 locale/ka/index.d.ts
-locale/ti/index.d.ts
+locale/ti/index.d.ts
\ No newline at end of file
diff --git a/types/javascript-time-ago/gradation/canonical.d.ts b/types/javascript-time-ago/gradation/canonical.d.ts
new file mode 100644
index 0000000000..a5f70b7e07
--- /dev/null
+++ b/types/javascript-time-ago/gradation/canonical.d.ts
@@ -0,0 +1,5 @@
+import { Gradation } from './';
+
+declare const canonical: Gradation[];
+
+export default canonical;
diff --git a/types/javascript-time-ago/gradation/convenient.d.ts b/types/javascript-time-ago/gradation/convenient.d.ts
new file mode 100644
index 0000000000..64d39c1467
--- /dev/null
+++ b/types/javascript-time-ago/gradation/convenient.d.ts
@@ -0,0 +1,5 @@
+import { Gradation } from './';
+
+declare const convenient: Gradation[];
+
+export default convenient;
diff --git a/types/javascript-time-ago/gradation/helpers.d.ts b/types/javascript-time-ago/gradation/helpers.d.ts
new file mode 100644
index 0000000000..618a002f99
--- /dev/null
+++ b/types/javascript-time-ago/gradation/helpers.d.ts
@@ -0,0 +1,9 @@
+import { Gradation, Unit } from '.';
+
+export const minute: number;
+export const hour: number;
+export const day: number;
+export const month: number;
+export const year: number;
+export function getStep(gradation: Gradation[], unit: Unit): Gradation | undefined;
+export function getDate(value: Date | number): Date;
diff --git a/types/javascript-time-ago/gradation/index.d.ts b/types/javascript-time-ago/gradation/index.d.ts
new file mode 100644
index 0000000000..36c51b01df
--- /dev/null
+++ b/types/javascript-time-ago/gradation/index.d.ts
@@ -0,0 +1,20 @@
+export type Unit = 'now' | 'second' | 'minute' | 'hour' | 'day' | 'week' | 'month' | 'year';
+
+export interface Gradation {
+    unit?: Unit;
+    factor?: number;
+    granularity?: number;
+    threshold?: number;
+    threshold_for_now?: number;
+    threshold_for_second?: number;
+    threshold_for_minute?: number;
+    threshold_for_hour?: number;
+    threshold_for_day?: number;
+    threshold_for_week?: number;
+    threshold_for_month?: number;
+    threshold_for_year?: number;
+}
+
+export { default as canonical } from './canonical';
+export { default as convenient } from './convenient';
+export { minute, hour, day, month, year, getStep, getDate } from './helpers';
diff --git a/types/javascript-time-ago/index.d.ts b/types/javascript-time-ago/index.d.ts
index 0621d00899..add98f9ca9 100644
--- a/types/javascript-time-ago/index.d.ts
+++ b/types/javascript-time-ago/index.d.ts
@@ -2,16 +2,24 @@
 // Project: https://github.com/catamphetamine/javascript-time-ago
 // Definitions by: Erik Burton  <https://github.com/erikburt>
 //                 Henry Nguyen <https://github.com/HenryNguyen5>
+//                 Luis Felipe Zaguini <https://github.com/zaguiini>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
-
-import { Locale, TimeUnit, Duration, DefaultFormats, RTFFormatter, Formats, QuantifyType } from "./locale";
+import {
+    DefaultFormats,
+    Duration,
+    Formats,
+    Locale,
+    RTFFormatter,
+    TimeUnit
+} from './locale';
+import { FormatStyle } from './style';
 
 export = TimeAgo;
 
 declare class TimeAgo {
     constructor(locales?: string | string[]);
 
-    format(input: Date | number, style?: string): string;
+    format(input: Date | number, style?: string | FormatStyle): string;
     formatNumber(number: number): string;
     formatValue(value: Date | number, unit: TimeUnit, localeData: Duration): string;
     getFormatter(flavor: DefaultFormats): RTFFormatter;
diff --git a/types/javascript-time-ago/style/default.d.ts b/types/javascript-time-ago/style/default.d.ts
new file mode 100644
index 0000000000..5ae9d2802f
--- /dev/null
+++ b/types/javascript-time-ago/style/default.d.ts
@@ -0,0 +1,3 @@
+import { FormatStyle } from './index';
+
+export default FormatStyle;
diff --git a/types/javascript-time-ago/style/index.d.ts b/types/javascript-time-ago/style/index.d.ts
new file mode 100644
index 0000000000..4dc0423aae
--- /dev/null
+++ b/types/javascript-time-ago/style/index.d.ts
@@ -0,0 +1,26 @@
+import { Gradation, Unit } from '../gradation';
+import { Locale } from '../locale';
+
+export type Flavour = 'tiny' | 'short-time' | 'narrow' | 'short' | 'long';
+
+export interface CustomFormatterOptions {
+    now: number;
+    date?: Date;
+    time: number;
+    elapsed: number;
+    locale: Locale;
+}
+
+export type CustomFormatter = (options: CustomFormatterOptions) => string | undefined;
+
+export interface FormatStyle {
+    units?: Unit;
+    gradation?: Gradation[];
+    flavour?: Flavour[];
+    custom?: CustomFormatter;
+    format?(date: Date | number, locale: Locale): string;
+}
+
+export { default as timeStyle } from './time';
+export { default as twitterStyle } from './twitter';
+export { default as defaultStyle } from './default';
diff --git a/types/javascript-time-ago/style/time.d.ts b/types/javascript-time-ago/style/time.d.ts
new file mode 100644
index 0000000000..5ae9d2802f
--- /dev/null
+++ b/types/javascript-time-ago/style/time.d.ts
@@ -0,0 +1,3 @@
+import { FormatStyle } from './index';
+
+export default FormatStyle;
diff --git a/types/javascript-time-ago/style/twitter.d.ts b/types/javascript-time-ago/style/twitter.d.ts
new file mode 100644
index 0000000000..5ae9d2802f
--- /dev/null
+++ b/types/javascript-time-ago/style/twitter.d.ts
@@ -0,0 +1,3 @@
+import { FormatStyle } from './index';
+
+export default FormatStyle;