All Options

All the options in crafty.config.js apart from your bundles in the js and css bundles are optional.

Option Default Value Description Preset
browsers See below The browser compatibility we wish in the compiled files. Read more below Core
destination See below The destination at which to put all files Core
destination_<bundleType> destination + "/" + bundleType The destination for JavaScript/TypeScript files Core
eslint Swissquote JavaScript Guideline This defines the rules for all JavaScript source files that go through the Gulp builder crafty-preset-babel
eslintReactVersion "15.0" Some linting rules need to know the React version used. crafty-preset-babel
externals [] What libraries are already provided in the final application, see below for more information crafty-runner-rollup / crafty-runner-webpack
img_basedir "images" Where to take images from (Relative to current working directory) crafty-preset-images / crafty-preset-images-simple
img_extensions ["png", "jpg", "jpeg", "gif"] What extensions to compress (excludes svg) crafty-preset-images
legacy_css false When enabling this feature, the CSS will be linted for errors and formatting instead of the Swissquote CSS Guideline crafty-preset-postcss
mavenType See below Defines wether this application is a webapp or webjar. crafty-preset-maven
stylelint Swissquote CSS Guideline This defines the rules for all CSS source files, it contains the naming conventions crafty-preset-postcss
stylelint_legacy Swissquote CSS Guideline This defines the rules for all CSS source files, it contains the base formatting rules and best practices crafty-preset-postcss
stylelint_pattern See Below Define the file types you want to target when linting CSS files. crafty-preset-postcss
uglifyJS See below Configure the compression level of your JavaScript assets. crafty-preset-babel / crafty-runner-rollup / crafty-runner-webpack


By default, your compiled assets will be in dist/<bundleType>. But you can override the config.destination or config.destination_<bundleType> option.

You can also use the crafty-preset-maven with the mavenType option to move your assets to Maven's target directory.

More about crafty-preset-maven

browser: Browser compatibility

Default: "> 0.25%, Firefox ESR, Edge >= 13, Safari >= 7.1, iOS >= 7.1, Chrome >= 32, Firefox >= 24, Opera >= 24, IE >= 9"

Depending on the target browsers, some optimization might be enabled or disabled to create the smallest possible package for the browsers requirements we have.

This option is for example used by Autoprefixer to define which CSS Prefixes it needs to add to the CSS file.

The default browsers we defined was taken from the statistics of browser usage we have seen across all Swissquote Platforms

If you want a different list, you can override those defaults using any valid Browserslist query source

uglifyJS : JavaScript compression

Default: { compress: true, sourceMap: true }

By default, we compress our JavaScript with safe parameters, if you wish you can go further and enable more advanced compression techniques.

The options are described in UglifyJS' documentation

stylelint_pattern: Which files to lint

Default: ["css/**/*.scss", "css/**/*.css", "!*.min.css", "!**/vendor/**/*.scss", "!**/vendor/**/*.css", "!**/vendor/*.scss", "!**/vendor/*.css"]

Define the file types you want to target when linting CSS files.


A bundle is a set of one or more source files that will be compiled in on or more destination files.

Each bundle has one mandatory option : source.

If we take this JavaScript bundle :

app: { // name of the bundle
 source: ['js/panel.js', 'js/nothing.js'],

This will automatically create a file in <destination_js>/app.min.js containing both source files that will be minified.

The file name is taken from the bundle name if no destination is specified

Common Bundle options

Option Type Optional ? Description
source String/Array No One single file or an array of files you wish to compile. Glob expressions are valid.
runner String No The name of the runner to use for this bundle. Is mandatory if more than one runner is loaded
destination String Yes The name to give to the final file. Defaults to <bundle_name>.min.<bundle_type>
watch String/Array Yes The watch expression to use to rebuild this asset. Any glob expression is valid, is needed for Gulp in watch mode.

CSS Bundles

testIndex: {
    source: 'css/test/test.scss',
    destination: 'index.min.css',
    watch: 'css/test/**.scss'

testIndex is the bundle name, you will be able to call gulp css_testIndex to build it.

Apart from the common options, here are the options you can use for CSS bundles.

Option Type Runner Preset Description
extractCSS Boolean / String / Object Webpack crafty-preset-postcss This will extract the CSS out of the bundle, all Official options work, you can also pass true which will use [bundle]-[name].min.css as file name, you can use [bundle] in the file name which is replaced by your bundle name.

JavaScript Bundles

app: {
    source: ['js/panel.js', 'js/nothing.js'],
    destination: 'app.min.js'

app is the bundle name, you will be able to call gulp js_app to build it.

Apart from the common options, here are the options you can use for JavaScript bundles.

Option Type Runner Preset Description
format String rollup.js crafty-runner-rollup Define the output format can be any of amd, iife, cjs, es or umd. Defaults to es.
externals Array<String> rollup.js / Webpack crafty-runner-webpack / crafty-runner-rollup Extends the list of provided libraries (Webpack understands both globs and strings, rollup.js doesn't understand globs)
hot Boolean Webpack crafty-runner-webpack Allows to use Hot Module Replacement in watch mode (false by default)
libraryTarget String Webpack crafty-runner-webpack Define the library type to export. By default we use amd. Possible values
library String Webpack crafty-runner-webpack Define the library name for the Webpack module or export.
concat Boolean Gulp crafty-preset-babel This will merge all files together, outputting a single file. (This doesn't resolve imports, use Webpack or rollup.js for this)

JavaScript External assets

By default, all bundlers include all external dependencies in the final bundle, this works fine for applications, but if you wish to build a multi-tenant application or a library, you don't wish to include all dependencies, because you'll end up with the same dependency more than one time.

The externals option allows you to define a list of libraries that are provided and should not be embedded in the build, here is an example :

module.exports = {
    // patterns are strings or globs
    externals: ["react", "react-dom", "squp", "squp/**"],
    js: {
        app: {
            // You can provide more items here, they will be merged with the main list for this bundle
            externals: ["my-plugin", "my-plugin/**"]

In this example react, react-dom and all modules starting with squp/ will be treated as external

You can see that globs were used here, note that they work for Webpack but not for rollup.js that needs complete strings.