Figma to Design Tokens W3C Spec

This is a composable package that exports Figma variables in the Design Tokens (W3C) spec, regardless of Figma environment it is running in.

Usage

Import the package into your script and provide the necessary options.

Inside a Figma Plugin

Configure your Figma plugin with typings and pass the Figma client to the composable.

import { useFigmaToDTCG } from '@tfk-samf/figma-to-dtcg';

const { tokens } = await useFigmaToDTCG({
    api: "plugin",
    client: figma
});

Using the Figma Variables Rest API

import { useFigmaToDTCG } from "@tfk-samf/figma-to-dtcg"
import { GetLocalVariablesResponse } from "@figma/rest-api-spec"

const response = await fetch("https://api.figma.com/v1/files/:file_key/variables/local", {
    headers: {
        "X-FIGMA-TOKEN": ":figma_token",
    }
})

const { tokens } = await useFigmaToDTCG({
    api: "rest",
    response
});

Props

• props: RestAPIProps | PluginAPIProps

type PluginAPIProps = {
    api?: 'plugin'
    client: PluginAPI   // Reference to the Plugin API instance
}

type RestAPIProps = {
    api?: 'rest',
    response: GetLocalVariablesResponse     // Response from Figma Rest API
}

Under the hood

Figma Variables are accessed using either the Figma Plugin API or the REST API. This results in the data structure below.

// Figma `GetLocalVariablesResponse` from the REST API. the Plugin API deals with the same file structure under the hood.

{
        "status": 200,
        "error": false,
        "meta": {
            "variableCollections": {
                "VariableCollectionId:1": {
                    "id": "VariableCollectionId:1",
                    "name": "Border",
                    "hiddenFromPublishing": false,
                    "key": "VariableCollectionId1",
                    "defaultModeId": "1",
                    "modes": [
                        {
                            "name":"Scale",
                            "modeId":"1"
                        }
                    ],
                    "remote":false,
                    "variableIds": [ "VariableID:1" ]
                }
        },
        "variables": {
            "VariableID:1": {
                "id":"VariableID:1",
                "name":"Radius/Small",
                "description":"",
                "variableCollectionId": "VariableCollectionId:1",
                "key": "VariableId1",
                "remote": false,
                "resolvedType": "FLOAT",
                "valuesByMode": { "1": 4 },
                "scopes":["CORNER_RADIUS"],
                "hiddenFromPublishing": false,
                "codeSyntax": {}
            }
        }
    }    
}

This package links up the variables collections and individual variables and modes, to then outputs the simple JSON structure below in the design tokens format.

{
  "Radius": {
    "Small": {
      "value": 4,
      "type": "number",
      "prefix": "border"
    }
  }
}

This design tokens specification can be consumed by your favorite tool to connect design and code using design tokens. We provide an implementation example for Style Dictionary.