# bootstrap-loader
**Repository Path**: mirrors_shakacode/bootstrap-loader
## Basic Information
- **Project Name**: bootstrap-loader
- **Description**: Load Bootstrap styles and scripts in your Webpack bundle
- **Primary Language**: Unknown
- **License**: MIT
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No
## Statistics
- **Stars**: 0
- **Forks**: 0
- **Created**: 2020-11-23
- **Last Updated**: 2026-05-17
## Categories & Tags
**Categories**: Uncategorized
**Tags**: None
## README
[](https://travis-ci.org/shakacode/react_on_rails)
[](https://badge.fury.io/js/bootstrap-loader)
**Webpack v4 and Bootstrap v4 supported!**
If you're using this project and you like it, please give us a star! Thanks!
If you're building an e-commerce site, like [printivity.com](https://www.printivity.com/) or a marketplace site like [datacenters.com](https://www.datacenters.com) and [Hawaii Chee](https://www.hawaiichee.com), and you want to use Rails and React, please [get in touch](mailto:justin@shakacode.com), as that is ShakaCode's speciality. We built those sites!
Intersted in optimizing your webpack setup for [React on Rails](https://github.com/shakacode/react_on_rails) including code splitting with react-router v4, webpack v4, and react-loadable? [Contact me](mailto:justin@shakacode.com).
ShakaCode is **[currently looking to hire](http://www.shakacode.com/about/#work-with-us)** like-minded developers that wish to work on our projects, including [Hawaii Chee](https://www.hawaiichee.com). We're getting into [Reason](https://reasonml.github.io/)!
We at [ShakaCode](http://www.shakacode.com) are a small, boutique, remote-first application development company. We fund this project by:
* Providing priority support and training for anything related to React + Webpack + Rails in our [Coaching Program](http://www.shakacode.com/work/shakacode-pro-support.pdf).
* Building custom web and mobile (React Native) applications. We typically work with a technical founder or CTO and instantly provide a full development team including designers.
* Migrating **Angular** + Rails to React + Rails. You can see an example of React on Rails and our work converting Angular to React on Rails at [egghead.io](https://egghead.io/browse/frameworks).
* **[React on Rails](https://github.com/shakacode/react_on_rails)** is ShakaCode's flagship product. We want to make sure you're aware of it!
Aloha and best wishes from the ShakaCode team!
# ShakaCode Community
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* **Slack Room**: [Contact us](mailto:contact@shakacode.com) for an invite to the ShakaCode Slack room!
* **[forum.shakacode.com](https://forum.shakacode.com)**: Post your questions
* **[@ShakaCode on Twitter](https://twitter.com/shakacode)**
### Testimonials
From Joel Hooks, Co-Founder, Chief Nerd at [egghead.io](https://egghead.io/), January 30, 2017:
# bootstrap-loader v3 Docs!
If you want the v1 docs which are compatible with Webpack v1, please see the [v1 branch](https://github.com/shakacode/bootstrap-loader/tree/v1). If you're using v2, be sure to check the peer dependencies of `webpack` and the `extract-text-webpack-plugin`. See the [v2 docs](https://github.com/shakacode/bootstrap-loader/tree/2.2.0).
# bootstrap-loader
Successor to [bootstrap-sass-loader](https://github.com/shakacode/bootstrap-sass-loader). Load Bootstrap styles and scripts in your Webpack bundle. This loader uses SASS to process CSS styles. Bootstrap 3 & 4 are supported.
## Table of Contents
+ [Installation](#installation)
+ [Usage](#usage)
- [Bootstrap 4 internal dependency solution](#bootstrap-4-internal-dependency-solution)
+ [Examples](#examples)
+ [Common configuration options](#common-configuration-options)
- [Bootstrap 3 & 4](#bootstrap-3--4)
- [Bootstrap 4 only](#bootstrap-4-only)
* [Tether](#tether)
* [PostCSS](#postcss)
* [Glyphicon alternatives](#glyphicon-alternatives)
+ [Additional configurations](#additional-configurations)
- [Paths to custom assets](#paths-to-custom-assets)
- [Incorporating Bootswatch themes](#incorporating-bootswatch-themes)
- [Multiple CSS themes](#multiple-css-themes)
- [jQuery](#jquery)
- [Icon fonts](#icon-fonts)
+ [FAQ](#faq)
- [Using Bootstrap mixins and variables](#using-bootstrap-mixins-and-variables)
+ [Contributing](#contributing)
+ [License](#license)
+ [Examples and related libraries](#examples-and-related-libraries)
+ [Useful Q&A](#useful-qa)
## Installation
Get it via npm:
```bash
npm install bootstrap-loader
```
Don't forget to install these dependencies (use `--save or --save-dev` option per your needs to update your `package.json`):
```bash
# Bootstrap 3
npm install --save-dev bootstrap-sass
# or Bootstrap 4
npm install --save-dev bootstrap
# Node SASS & other loaders needed to handle styles
npm install --save-dev css-loader node-sass resolve-url-loader sass-loader style-loader url-loader
# Additional loaders required for Bootstrap 3 & 4
npm install --save-dev imports-loader exports-loader
```
If you're using Bootstrap 4, you probably need:
```bash
npm install --save-dev postcss-loader
```
## Usage
Simply require it:
```js
require('bootstrap-loader');
```
Or add `bootstrap-loader` as [a module in an entry point](https://webpack.github.io/docs/configuration.html#entry) in your webpack config (you'll need Webpack 2.1 beta and higher):
```js
entry: [ 'bootstrap-loader', './app' ]
```
Config is optional. If used, by default it should be placed in your project's root dir with name `.bootstraprc`. You can write it in `YAML` or `JSON` formats. Take a look at the default config files for [Bootstrap 3](.bootstraprc-3-default) and [Bootstrap 4](.bootstraprc-4-default). Note, we recommend using a configuration or else you might pick up unwanted upgrades, such as when we make Bootstrap 4 the default. Config options don't fall back on the defaults once a config file is present. Be sure not to delete config options. To start with a custom config, copy over a default config file as a starting point.
If the default location doesn't work for you (e.g. you want to [create multiple bootstrap configs](#multiple-css-themes) for branding variations or you symlink your npm_modules directory), you may pass the **absolute path** of the `.bootstraprc` file to the loader in your webpack config, e.g. `bootstrap-loader/lib/bootstrap.loader?extractStyles&configFilePath=${__dirname}/.bootstraprc!bootstrap-loader/no-op.js`.
Note that :`__dirname` is a [global variable](https://nodejs.org/docs/latest/api/globals.html#globals_dirname) that Node sets for us. It is "the name of the directory that the currently executing script resides in."
### YAML Format
```yaml
---
# You can use comments here
styleLoaders:
- style-loader
- css-loader
- sass-loader
styles:
normalize: true
print: true
scripts:
alert: true
button: true
```
### JSON Format
```json
{
// And JSON comments also!
"styleLoaders": ["style-loader", "css-loader", "sass-loader"],
"styles": {
"normalize": true,
"print": true
},
"scripts": {
"alert": true,
"button": true
}
}
```
If no config provided, default one for Bootstrap 3 will be used.
### ENV Specific Values
The following settings can be set differently
Different settings for different environments can be used.
Example of setting production to extract styles and other envs don't and use the style-loader:
```yaml
# It depends on value of NODE_ENV environment variable
env:
production:
extractStyles: true
styleLoaders:
- css-loader
- postcss-loader
- sass-loader
# If NODE_ENV specific value not found
extractStyles: false
styleLoaders:
- style-loader
- css-loader
- postcss-loader
- sass-loader
```
### Bootstrap 4 internal dependency solution
Because of Bootstrap 4's removal of UMD, internal dependencies, such as Popover's dependencies on Tooltip and Dropdown's dependency on Utils, are no longer naively resolved by Webpack (See Issue [#172](https://github.com/shakacode/bootstrap-loader/issues/172). In order to solve this issue, add the following code to your webpack configuration:
```
plugins: [
new webpack.ProvidePlugin({
$: "jquery",
jQuery: "jquery",
"window.jQuery": "jquery",
Tether: "tether",
"window.Tether": "tether",
Popper: ['popper.js', 'default'],
Alert: "exports-loader?Alert!bootstrap/js/dist/alert",
Button: "exports-loader?Button!bootstrap/js/dist/button",
Carousel: "exports-loader?Carousel!bootstrap/js/dist/carousel",
Collapse: "exports-loader?Collapse!bootstrap/js/dist/collapse",
Dropdown: "exports-loader?Dropdown!bootstrap/js/dist/dropdown",
Modal: "exports-loader?Modal!bootstrap/js/dist/modal",
Popover: "exports-loader?Popover!bootstrap/js/dist/popover",
Scrollspy: "exports-loader?Scrollspy!bootstrap/js/dist/scrollspy",
Tab: "exports-loader?Tab!bootstrap/js/dist/tab",
Tooltip: "exports-loader?Tooltip!bootstrap/js/dist/tooltip",
Util: "exports-loader?Util!bootstrap/js/dist/util",
})
]
```
## Examples
Check out example apps in [`examples/`](examples) folder:
* Basic usage: [examples/basic](examples/basic)
* With CSS Modules: [examples/css-modules](examples/css-modules) (This example shows off hot reloading with Babel 6 as well!)
* With multiple entries [examples/multiple-entries](examples/multiple-entries) with their own config _[currently out of date]_.
## Common configuration options
Here are common options for Bootstrap 3 & 4.
### Bootstrap 3 & 4
#### `loglevel`
Default: `disabled`
Outputs debugging info. Set this option to `debug` to output debugging information. This is critical for debugging issues. The output will go to your webpack console.
```yaml
loglevel: debug
```
#### `bootstrapVersion`
Default: `3`
Major version of Bootstrap. Can be 3 or 4.
```yaml
bootstrapVersion: 3
```
#### `styleLoaders`
Default: `[ 'style-loader', 'css-loader', 'sass-loader' ]`
Env Specific: true
Array of webpack loaders. `sass-loader` is required, order matters. In most cases the style loader should definitely go first and the sass loader should be last.
Note: Beginning with Webpack v2.1.0-beta.26, the '-loader' suffix is required for all loaders.
To maintain compatibility with older versions, all accepted style loaders (style, css, postcss, sass, resolve-url) are automatically appended with '-loader'.
It is recommended that you explicitly state the '-loader' suffix for every webpack loader in `styleLoaders` to ensure compatibility in the long term.
```yaml
styleLoaders:
- style-loader
- css-loader
- sass-loader
# You can apply loader params here:
- sass-loader?outputStyle=expanded
```
Different settings for different environments can be used. See above example.
#### `extractStyles`
Default: `false`
Env Specific: true
Extract styles to stand-alone css file using `mini-css-extract-plugin` version 2.0.0-beta or higher. See [mini-css-extract-plugin](https://github.com/webpack-contrib/mini-css-extract-plugin) for more details.
```yaml
extractStyles: false
```
Different settings for different environments can be used. See above example.
This param can also be set to `true` in webpack config:
```js
entry: [ 'bootstrap-loader/extractStyles', './app' ]
```
See [shakacode/react-webpack-rails-tutorial/blob/master/client/webpack.client.rails.build.config.](https://github.com/shakacode/react-webpack-rails-tutorial/blob/master/client/webpack.client.rails.build.config.js) for a working example which is deployed to [www.reactrails.com](http://www.reactrails.com/).
#### `preBootstrapCustomizations`
Default: `disabled`
Customize Bootstrap variables that get imported before the original Bootstrap variables. Thus, derived Bootstrap variables can depend on values from here. See the Bootstrap [`_variables.scss`](https://github.com/twbs/bootstrap-sass/blob/master/assets/stylesheets/bootstrap/_variables.scss) file for examples of derived Bootstrap variables.
```yaml
preBootstrapCustomizations: ./path/to/bootstrap/pre-customizations.scss
```
#### `bootstrapCustomizations`
Default: `disabled`
This gets loaded after bootstrap variables is loaded. Thus, you may customize Bootstrap variables based on the values established in the Bootstrap [`_variables.scss`](https://github.com/twbs/bootstrap-sass/blob/master/assets/stylesheets/bootstrap/_variables.scss) file. Note, if `bootstrap` did not have derived values, it would not be necessary to have two config files for customizing bootstrap values.
If you want your bootstrap override value to apply to derived variable values, then place your customizations in `preBootstrapCustomizations`. If you want to be sure your changes don't affect other derived values, place the changes in bootstrapCustomizations.
If you are not sure, you can probably simply use `preBootstrapCustomizations` and, if you have issues, see [`_variables.scss`](https://github.com/twbs/bootstrap-sass/blob/master/assets/stylesheets/bootstrap/_variables.scss) for derived values.
```yaml
bootstrapCustomizations: ./path/to/bootstrap/customizations.scss
```
#### `appStyles`
Default: `disabled`
Import your custom styles here. Usually this endpoint-file contains list of `@imports` of your application styles.
```yaml
appStyles: ./path/to/your/app/styles/endpoint.scss
```
#### `styles`
Default: all
Bootstrap styles.
```yaml
styles:
mixins: true
normalize: true
...
# or enable/disable all of them:
styles: true / false
```
#### `scripts`
Default: all
Bootstrap scripts.
```yaml
scripts:
transition: true
alert: true
...
# or enable/disable all of them:
scripts: true / false
```
#### `useCustomIconFontPath`
Default: false
If you're using a custom icon font and you need to specify its path (`$icon-font-path`) in your Sass files, set this option to true.
```yaml
useCustomIconFontPath: true / false
```
```
$icon-font-path: ../fonts // relative to your Sass file
$icon-font-name: 'glyphicons' // you'll typically want to change this too.
```
### Bootstrap 4 only
There is only one additional option for Bootstrap 4:
#### Tether
Additionally, Bootstrap 4 requires Tether. You can add Tether per the examples in the `/examples` directory.
1. Add tether to package.json: `npm i --save tether`
2. Add tether as an entry point to your webpack config.
3. Add this plugin to your webpack config:
```
plugins: [
new ExtractTextPlugin('app.css', { allChunks: true }),
new webpack.ProvidePlugin({
"window.Tether": "tether"
}),
],
```
#### PostCSS
Bootstrap 4 seems to require postcss:
1. Add postcss and the the postcss-loader: `npm i --save postcss postcss-loader`
2. Put `postcss` before `sass` in the order of loaders in your `.bootstraprc` file.
#### Glyphicon alternatives
Glyphicons have been removed from Bootstrap 4. The examples demonstrate how to use the font-awesome-loader
## Additional configurations
#### Paths to custom assets
If you use `bootstrap-loader` to load your styles (via `preBootstrapCustomizations`, `bootstrapCustomizations` & `appStyles`) and you load custom assets (fonts, images etc.), then you can use relative paths inside `url` method (relative to SASS file, from which you load asset).
This was made possible thanks to [resolve-url-loader](https://github.com/bholloway/resolve-url-loader). In common case you don't have to do anything special to apply it — we are doing it internally (just don't forget to install it). But if you want to use its custom settings, please provide it explicitly via `styleLoaders` option in `.bootstraprc`:
```yaml
styleLoaders:
- style-loader
- css-loader?sourceMap
- resolve-url-loader?sourceMap
- sass-loader?sourceMap
```
#### Incorporating Bootswatch themes
The following steps are needed to successfully incorporate a theme from Bootswatch:
1. Download the `.scss` files (`_variables.scss` and `_bootswatch.scss`) for the theme you have chosen.
2. Put the files somewhere in your project structure (e.g. the `./styles` directory).
3. Add an additional SCSS file, like bs-theme.scss, that contains the following:
```
@import './_bootswatch.scss';
```
4. Add the following to your .bootstraprc file:
```
preBootstrapCustomizations: ./styles/_variables.scss
appStyles: ./styles/bs-theme.scss
```
The theme should now be applied as expected.
Note that this section might be valid for other theme packs as well.
#### Multiple CSS themes
See [examples/multiple-entries/webpack.prod.config.js](examples/multiple-entries/webpack.prod.config.js) for an example configuration of the following:
1. In `entry`, set up one bundle per theme. In each bundle include `bootstrap-loader` with [`extractStyles`](https://github.com/shakacode/bootstrap-loader#extractstyles) and the respective config file.
2. In `plugins,` set up the `extract-text-webpack-plugin` to output each CSS file as `[name].css`. This will output a CSS file named after each bundle.
#### jQuery
If you want to use Bootstrap's JS scripts — you have to provide `jQuery` to Bootstrap JS modules using `imports-loader`. To avoid having to include `jQuery` in your project you can disable all scripts (see [scripts](#scripts)).
```js
module: {
loaders: [
// Use one of these to serve jQuery for Bootstrap scripts:
// Bootstrap 3
{ test:/bootstrap-sass[\/\\]assets[\/\\]javascripts[\/\\]/, loader: 'imports-loader?jQuery=jquery' },
// Bootstrap 4
{ test: /bootstrap[\/\\]dist[\/\\]js[\/\\]umd[\/\\]/, loader: 'imports-loader?jQuery=jquery' },
],
},
```
Note: if you're not concerned about Windows, the lines look like this (simpler regexp pattern):
```js
// Bootstrap 3
{ test: /bootstrap-sass\/assets\/javascripts\//, loader: 'imports-loader?jQuery=jquery' },
// Bootstrap 4
{ test: /bootstrap\/dist\/js\/umd\//, loader: 'imports-loader?jQuery=jquery' },
```
#### Icon fonts
Bootstrap uses **icon fonts**. If you want to load them, don't forget to setup `url-loader` or `file-loader` in webpack config:
```js
module: {
loaders: [
{ test: /\.(woff2?|svg)$/, loader: 'url-loader?limit=10000' },
{ test: /\.(ttf|eot)$/, loader: 'file-loader' },
],
},
```
## FAQ
### Using Bootstrap mixins and variables
You should use `sass-resources-loader` in your `webpack` config.
In your `webpack.config.js`:
```javascript
module.exports = {
// stuff removed for clarity ...
module: {
loaders: [
// stuff removed for clarity ...
{
test: /\.scss$/,
loader: ExtractTextPlugin.extract(
'style-loader',
'css-loader?modules&importLoaders=2&localIdentName=[name]__[local]__[hash:base64:5]' +
'!sass-loader' +
'!sass-resources-loader'
),
},
// stuff removed for clarity ...
],
},
// stuff removed for clarity ...
sassResources: './config/sass-resources.scss',
}
```
And in your `./config/sass-resources.scss`:
```
// Make variables and mixins available when using CSS modules.
@import "node_modules/bootstrap-sass/assets/stylesheets/bootstrap/_variables";
@import "node_modules/bootstrap-sass/assets/stylesheets/bootstrap/_mixins";
```
You can then use mixins and variables from Bootstrap in your own code.
### Using a custom location for bootstrap module
By default, `bootstrap-loader` will try to resolve `bootstrap` from where `bootstrap-loader` has been installed. In [certain situations](https://github.com/shakacode/bootstrap-loader/issues/254) (e.g. npm linking, using a custom package installer) it may not be resolvable. In this case, you can pass in the location manually.
```js
require('bootstrap-loader?bootstrapPath=/path/to/bootstrap');
// or
entry: [ 'bootstrap-loader?bootstrapPath=/path/to/bootstrap', './app' ]
```
## Contributing
See [Contributing](CONTRIBUTING.md) to get started.
## License
MIT.
## Examples and related libraries
* [react-webpack-rails-tutorial](https://github.com/shakacode/react-webpack-rails-tutorial/), live example at [www.reactrails.com](http://www.reactrails.com/).
* [sass-resources-loader](https://github.com/shakacode/sass-resources-loader/)
* [Simple integration example](./examples/basic)
* [React + hot reloading example: bootstrap-loader-css-modules-example](./examples/css-modules)
* [react_on_rails gem](https://github.com/shakacode/react_on_rails)
## Useful Q&A
* [Using CSS modules with Bootstrap](https://github.com/shakacode/bootstrap-loader/issues/9)
* [How would you use bootstrap styles to build css module styles](https://github.com/shakacode/bootstrap-loader/issues/12)
We'll identify issues that are [questions](https://github.com/shakacode/bootstrap-loader/issues?utf8=%E2%9C%93&q=is%3Aissue+label%3Aquestion).
---
## Thank you from Justin Gordon and [ShakaCode](http://www.shakacode.com)
[The ShakaCode team has availability to help your project](http://www.shakacode.com/work). If your team might need my help, please [email me](mailto:justin@shakacode.com) for a free half-hour project consultation, on anything from React on Rails to any aspect of web or mobile application development for both consumer and enterprise products.
* **Video:** [Front-End Sadness to Happiness: The React on Rails Story](https://www.youtube.com/watch?v=SGkTvKRPYrk): History, motivations, philosophy, and overview.
We at [ShakaCode](http://www.shakacode.com) are a small, boutique, remote-first application development company. We fund this project by:
* Providing priority support and training for anything related to React + Webpack + Rails in our [Coaching Program](http://www.shakacode.com/work/shakacode-coaching-plan.pdf).
* Building custom web and mobile (React Native) applications. We typically work with a technical founder or CTO and instantly provide a full development team including designers.
* Migrating **Angular** + Rails to React + Rails. You can see an example of React on Rails and our work converting Angular to React on Rails at [egghead.io](https://egghead.io/browse/frameworks).
* Augmenting your team to get your product completed more efficiently and quickly.
I appreciate your attention and sharing of these offerings with anybody that we can help. Your support allows me to bring you and your team [front-end happiness in the Rails world](https://www.youtube.com/watch?v=SGkTvKRPYrk).
Aloha and best wishes from the ShakaCode team!
## Supporters
The following companies support our open source projects, and ShakaCode uses their products!
