Parcel-plugin-elm-svg NPM

parcel-plugin-elm-svg

This parcel plugin automatically generates Elm modules out of your SVG files so you can easily inline icons in your Elm app without having to use Image elements.

This technique allows you to tweak your icons on a per-usage basis, so you can reuse your icon in different places of your app where you might need different colors, sizes, line widths, you name it!

This plugin is a thin wrapper around our svg2elm tool that solves one specific use case. However, you might be interested in using svg2elm if you are using a different bundler, or you need improved flexibility.

Update

This plugin had a bug that prevented its configuration from loading if the parcel entry didn't exist in the same directory as package.json. That's fixed now! Please create an issue if it still doesn't work for you :)

Installation

Add parcel-plugin-elm-svg as a development dependency to your project:

$ npm install -D parcel-plugin-elm-svg@latest

How to use

Module configuration

Open up your package.json file and add:

    "elmSvgModules": [
        {
            "src": "assets/*.svg",
            "name": "Acme.Icons",
            "dest": "src/Acme/Icons.elm"
        }
    ]

This configuration will take all .svg files under the assets directory and generate an Acme.Icons Elm module at src/Acme/Icons.elm with a function per file.

Tweak module properties to match your needs:

Multiple modules

If you have different sets of assets, you can generate multiple Elm modules:

    "elmSvgModules": [
        {
            "src": "assets/accounts/*.svg",
            "name": "Acme.Assets.Accounts",
            "dest": "src/Acme/Assets/Accounts.elm"
        },
        {
            "src": "assets/shapes/*.svg",
            "name": "Acme.Assets.Shapes",
            "dest": "src/Acme/Assets/Shapes.elm"
        }
    ]

Since 0.19, Elm performs Dead Code Elimination; this means that you don't have to worry about separating assets by bundle. Only the used assets are shipped to production. However, you might still want to do this for your own code organization.

Running

Run parcel as you usually would:

$ parcel src/app.html

Using your icons

We can now use our generated icon functions in our Elm app:

module Main exposing (main)

import Html
import Svg.Attributes exposing (fill, width, stroke)
import Acme.Icons exposing (user, chevron)

main = 
    Html.div [] 
        [ user [ fill "red" ]
        , chevron [ stroke "red" ]
        , user [ fill "blue", width "20" ]
        ]

Check out svg2elm docs and the example app for more information.

We hope you enjoy the plugin!

Contributing

PRs and Issues are welcome!

Bugs and Feature Requests related to the parcel plugin must be raised in this repository.

If your assets are not getting converted to Elm functions properly, the problem is likely to exist in svg2elm instead. For example, if your generated Elm module does not compile, or the Svg does not look as it should, please raise your PR or issue in the svg2elm repository.