fable-loader
Webpack loader for Fable (F# to JS compiler)
Installation
npm install fable-loader fable-compiler @babel/core
Usage
Create a webpack-config.js
like the following and run it using Webpack (e.g. npx webpack
).
ATTENTION: In Fable 2.0 you had to call Webpack through the dotnet-fable CLI tool, starting from Fable 2.1 you call Webpack directly. For example, if you used the command dotnet fable webpack -- --config src/webpack.config.js
, replace it with npx webpack --config src/webpack.config.js
(you can also use yarn
instead of npx
). Note you don't need the --
separator anymore.
NOTE: The actual F# to JS compilation is done by fable-compiler
. You can control the compiler version through this package.
See the Fable webpack-config-template for a more comprehensive example of a Webpack configuration for Fable projects.
var path = ; moduleexports = mode: "production" entry: "./src/App.fsproj" output: path: path filename: "bundle.js" devServer: contentBase: "./public" port: 8080 module: rules: test: /\.fs?$/ use: "fable-loader"
Options
These are the options that can be passed to fable-loader
:
- babel: Babel options (only applied when transforming F# files, you may want to use the
babel-loader
if you also have JS files in your project). - define: Array of compilation constants passed to the F# compiler. Fable automatically defines
FABLE_COMPILER
and fable-loader will also defineDEBUG
in Webpack "development" mode. - typedArrays: Translate numeric arrays as JS Typed Arrays. True by default.
- clampByteArrays: If true, Fable will translate byte arrays as Uint8ClampedArray.
- silent: If true, Fable won't output any log (requires fable-compiler >=2.3.14).