✨⏰🥶 storybook-mock-date-decorator 🥶⏰✨

to help freeze time or mock dates in your stories

Install

For Storybook 9.0+

npm i storybook-mock-date-decorator@3 -D

For Storybook 6, 7, or 8

npm i storybook-mock-date-decorator@2 -D

Note: If you're using Storybook 6, 7, or 8, you must use the /legacy import path. Please refer to the v2.x README for complete usage instructions.

API

Once the decorator has been added to your storybook, you can configure the date with the parameter name date inside your stories.

Usage

Storybook 9

import { mockDateDecorator } from "storybook-mock-date-decorator";

/** @type { import('@storybook/react').Preview } */
const preview = {
  decorators: [mockDateDecorator],
  parameters: {
    controls: {
      matchers: {
        color: /(background|color)$/i,
      },
    },
  },
};

export default preview;

// stories/Button.stories.js

export default {
  title: 'Example/Button',
  component: Button,
  parameters: {
    date: new Date(1999, 10, 24),
  },
};

export const Primary = {
  args: {
    primary: true,
    label: 'Button',
  },
  parameters: {
    date: new Date(2021, 1, 1),
  }
};

Story Examples

Then inside your storybook, you can use the following code to mock/freeze the date for all stories of a component:

import { Meta } from "@storybook/react"
import { YourComponent } from "./your-component"

export default {
	title: "YourComponent",
	component: YourComponent,
	parameters: {
		date: new Date("March 10, 2021 10:00:00"),
	},
} as Meta

Or you can mock/freeze the date for a specific story:

import { Meta } from "@storybook/react"
import { YourComponent } from "./your-component"

export default {
	title: "YourComponent",
	component: YourComponent,
} as Meta

export function Default() {
    return <div>hello world at {new Date().toLocaleString()}</div>
}

export function WithMockedDate() {
    return <div>hello world! with mocked date of March 10th at {new Date().toLocaleString()}</div>
}
WithMockedDate.parameters = {
    date: new Date("March 10, 2021 10:00:00"),
}

Version Compatibility

Storybook Version	Package Version	Import Path	Documentation
9.0+	@3	storybook-mock-date-decorator	This README
8.x	@2	storybook-mock-date-decorator/legacy	v2.x README
6.x, 7.x	@2	storybook-mock-date-decorator/legacy	v2.x README

Important: For Storybook 6, 7, and 8, you must use the /legacy import path and follow the setup instructions in the v2.x documentation.