config-overrides.js

const { injectBabelPlugin } = require("react-app-rewired")
const rewireLess = require("react-app-rewire-less")

module.exports = function override(config, env) {
  config = injectBabelPlugin(
    [
      "import",
      {
        libraryName: "antd",
        libraryDirectory: "es",
        style: true
      }
    ], // change importing css to less
    config
  )
  config = rewireLess.withLoaderOptions({
    modifyVars: {
      "@font-family":
        '"IBM Plex Sans", "Helvetica Neueue", "Segoe UI", "sans-serif"',
      "@font-size-base": "15px",
      "@primary-color": "#7f2aff",
      "@shadow-1-up": "0 -2px 3px @shadow-color",
      "@shadow-1-down": "0 2px 3px @shadow-color",
      "@shadow-1-left": "-2px 0 3px @shadow-color",
      "@shadow-1-right": "2px 0 3px @shadow-color",
      "@shadow-2": "0 2px 6px @shadow-color"
    },
    javascriptEnabled: true
  })(config, env)
  return config
}