To reproduce
.jsx under ../src/components/Expected
Result
manager.bundle.js:811 Warning: Failed prop type: The prop `selectedKind` is marked as required in `Stories`, but its value is `undefined`.
in Stories (created by LeftPanel)
in LeftPanel (created by Container(LeftPanel))
in Container(LeftPanel) (created by Layout)
in div (created by Layout)
in div (created by Layout)
in div (created by Pane)
in Pane (created by SplitPane)
in div (created by SplitPane)
in SplitPane (created by Layout)
in div (created by Layout)
in Layout (created by Container(Layout))
in Container(Layout)
in div
and
manager.bundle.js:811 Warning: Failed prop type: The prop `selectedStory` is marked as required in `Stories`, but its value is `null`.
in Stories (created by LeftPanel)
in LeftPanel (created by Container(LeftPanel))
in Container(LeftPanel) (created by Layout)
in div (created by Layout)
in div (created by Layout)
in div (created by Pane)
in Pane (created by SplitPane)
in div (created by SplitPane)
in SplitPane (created by Layout)
in div (created by Layout)
in Layout (created by Container(Layout))
in Container(Layout)
in div
package
{
"name": "components",
"version": "0.1.0",
"private": true,
"dependencies": {
"@kadira/storybook": "^2.35.3",
"react": "^15.5.4",
"react-dom": "^15.5.4"
},
"devDependencies": {
"@storybook/react": "^2.21.0",
"react-scripts": "0.9.5"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test --env=jsdom",
"eject": "react-scripts eject",
"storybook": "start-storybook -p 9009 -s public",
"build-storybook": "build-storybook -s public"
}
}
Screenshot (logging webpack context)

I am also seeing the same error (and another one) in our travis build:

I'm getting the same error. Does anyone knows why? .-.
Oh, my bad.
In my case it happened because I was loading files finished with .stories.js in config.js and my stories were finished with .stories.jsx. For this reason storybook didn't find any story and log the error
So I just set to load .stories.jsx and .stories.js and it's working now! For reference:
before:
'use strict'
import React from 'react';
import { configure } from '@kadira/storybook';
const req = require.context('../src', true, /\.stories\.js$/);
function loadStories () {
req.keys().forEach((filename) => req(filename))
}
configure(loadStories, module);
after:
'use strict'
import React from 'react';
import { configure } from '@kadira/storybook';
const req = require.context('../src', true, /(\.stories\.js$)|(\.stories\.jsx$)/);
function loadStories () {
req.keys().forEach((filename) => req(filename))
}
configure(loadStories, module);
Can this issue be closed then?
Having the same issue although I'm using the .stories.js as my filename.
The config is identical to above with const req = require.context('../packages/', true, /\.stories\.js$/)
Files are under /packages/dirA/src/componentA/stories.js and /packages/dirB/src/componentB/stories.js
storybook version:"@storybook/react": "^3.1.7"
Let me know what else I can share or look into?
@artivilla , looks like you have a wrong regex according to your convention. Try to change it to /stories\.js$/
(redundant \. in the beginning)
@igor-dv that was the issue. Thank you!
I ran into this issue, it was a config problem as outlined above.
But it would be nice if the error message better described the problem. E.g. check for a "no stories found" condition and report that before failing with a deep internal error.
@igor-dv I am still getting this on a fresh install of CRA + Storybook as soon as I use the dynamic loading of modules
I am using the convention of creating stories inside files named story.js
So right now my structure is:
- /src
|- /components
|-- /ComponentName
|--- story.js
My config.js looks like this:
/* eslint-disable import/no-extraneous-dependencies, import/no-unresolved, import/extensions */
import { configure } from "@storybook/react";
const req = require.context("../src/components", true, /story\.js$/);
function loadStories() {
// require('../stories');
req.keys().forEach(path => req(path));
}
configure(loadStories, module);
I reproduced this by simply doing a fresh CRA with version 1.3.3 and then npm install -D @storybook/cli then npx getstorybook
I know it's finding my story becuase I can see it rendering, but these same prop errors are all over the console.
I created a repo the demonstrates the error: https://github.com/duro/storybook-prop-errors
On Aug 4, 2017 12:02 PM, "Glen Ihrig" notifications@github.com wrote:
I ran into this issue, it was a config problem as outlined above.
But it would be nice if the error message better described the problem.
E.g. check for a "no stories found" condition and report that before
failing with a deep internal error.
โ
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We're getting the same error here.
Our directory structure:
...
โโโ MyComponent
โ โโโ constants
โ โโโ stories
โ โ โโโ myComponent.js
โ โโโ styles
โ โโโ tests
โ โโโ utils
โ โโโ index.js
...
Our .storybook/config.js:
const components = require.context('../app/components', true, /stories\/.*\.js$/);
const scenes = require.context('../app/scenes/', true, /stories\/.*\.js$/);
function loadStories() {
components.keys().forEach(components);
scenes.keys().forEach(scenes);
}
configure(loadStories, module);
Surprisingly our stories are rendering correctly, it's just that we're facing this JS error in the console. Would be great to find a fix for that.
Cant fix this too, config
import { configure, addDecorator } from '@storybook/react'
import centered from '@storybook/addon-centered'
import '~/__utils__/setup'
// settings
addDecorator(centered)
// load
const req = require.context('../', true, /stories\.jsx?$/)
function loadStories() {
req.keys().forEach(filename => req(filename))
}
configure(loadStories, module)
I think @artivilla was mistaken and error is not resolved, because it occurs only on opening storybook in brand new tab, on reload it disappears
Reopen this issue please
@crtvhd @BjornMelgaard does this still show up in 3.2.5?
@Hypnosphi , no, works perfectly, thank you kind man)
@Hypnosphi Yes, upgrading has solved our issue. Thanks for the quick fix :)
EDIT: Nevermind, managed to solve it by upgrading node-sass from 4.5.0 to 4.5.3. A classic case of upgrade and rebuild node-sass ยฏ_(ใ)_/ยฏ
@Hypnosphi just seeing that unfortunately it broke our sass-loader. we seeing this error after the upgrade:
./node_modules/css-loader!./node_modules/sass-loader/lib/loader.js!./app/components/form/calendar/styles/calendar.scss
Module build failed: Error: ENOENT: no such file or directory, scandir '/Users/martin/Development/xxx/node_modules/node-sass/vendor'
in one of our components we're importing a SCSS file: import './styles/calendar.scss';
any idea why the sass-loader could suddenly fail?
I'm seeing this issue with storybook 3.4.10. Stories render as expected, but there are a lot of console errors:

config.js
import { configure } from "@storybook/react";
const req = require.context("../src/components/", true, /stories\.js$/);
function loadStories() {
req.keys().forEach(filename => req(filename));
}
configure(loadStories, module);
Upgrading hoist-non-react-statics to 3.0.1 did the trick!