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    1.7.1 • Public • Published

    Storybook Addon Knobs CircleCI

    Knobs allow you to edit React props dynamically using the Storybook UI. You can also use Knobs as a dynamic variable inside stories.

    This is how Knobs look like:

    Storybook Knobs Demo

    Checkout the above Live Storybook or watch this video.

    Getting Started

    First of all, you need to install knobs into your project as a dev dependency.

    npm i -D @kadira/storybook-addon-knobs

    Then, configure it as an addon by adding it to your addons.js file (located in the Storybook config directory).

    //  To get our default addons (actions and links)
    import '@kadira/storybook/addons';
    //  To add the knobs addon
    import '@kadira/storybook-addon-knobs/register'

    Now, write your stories with knobs.

    import React from 'react';
    import { storiesOf } from '@kadira/storybook';
    import { withKnobs, text, boolean, number } from '@kadira/storybook-addon-knobs';
    const stories = storiesOf('Storybook Knobs', module);
    // Add the `withKnobs` decorator to add knobs support to your stories.
    // You can also configure `withKnobs` as a global decorator.
    // Knobs for React props
    stories.add('with a button', () => (
        disabled={boolean('Disabled', false)}
        {text('Label', 'Hello Button')}
    // Knobs as dynamic variables.
    stories.add('as dynamic variables', () => {
      const name = text('Name', 'Arunoda Susiripala');
      const age = number('Age', 89);
      const content = `I am ${name} and I'm ${age} years old.`;
      return (<div>{content}</div>);

    You can see your Knobs in a Storybook panel as shown below.

    Additional Links

    Available Knobs

    These are the knobs available for you to use. You can import these Knobs from the @kadira/storybook-addon-knobs module. Here's how to import the text Knob.

    import { text } from '@kadira/storybook-addon-knobs';

    Just like that, you can import any other following Knobs:


    Allows you to get some text from the user.

    const label = 'Your Name';
    const defaultValue = 'Arunoda Susiripala';
    const value = text(label, defaultValue);


    Allows you to get a boolean value from the user.

    const label = 'Agree?';
    const defaultValue = false;
    const value = boolean(label, defaultValue);


    Allows you to get a number from the user.

    const label = 'Age';
    const defaultValue = 78;
    const value = number(label, defaultValue);

    number bound by range

    Allows you to get a number from the user using a range slider.

    const label = 'Temperature';
    const defaultValue = 73;
    const options = {
       range: true,
       min: 60,
       max: 90,
       step: 1,
    const value = number(label, defaultValue, options);


    Allows you to get a color from the user.

    const label = 'Color';
    const defaultValue = '#ff00ff';
    const value = color(label, defaultValue);


    Allows you to get a JSON object from the user.

    const label = 'Styles';
    const defaultValue = {
      backgroundColor: 'red'
    const value = object(label, defaultValue);

    Make sure to enter valid JSON syntax while editing values inside the knob.


    Allows you to get an array from the user.

    const label = 'Styles';
    const defaultValue = ['Red']
    const value = array(label, defaultValue);

    While editing values inside the knob, you will need to use a separator. By default it's a comma, but this can be override by passing a separator variable.

    const separator = ':';
    const value = array(label, defaultValue, separator);


    Allows you to get a value from a select box from the user.

    const label = 'Colors';
    const options = {
      red: 'Red',
      blue: 'Blue',
      yellow: 'Yellow',
    const defaultValue = 'red';
    const value = select(label, options, defaultValue);

    You can also provide options as an array like this: ['red', 'blue', 'yellow']


    Allow you to get date (and time) from the user.

    const label = 'Event Date';
    const defaultValue = new Date('Jan 20 2017');
    const value = date(label, defaultValue);


    If you are using typescript, make sure you have the type definitions installed for the following libs:

    • node
    • react

    You can install them using npm i -S @types/node @types/react, assuming you are using Typescript >2.0.




    npm i @kadira/storybook-addon-knobs

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