babel-plugin-remove-nonjs/lib/index.js

Babel plugin to remove dependencies of non JS files such as CSS and images

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _path = require('path');

exports.default = ({ types: t }) => {
  return {
    visitor: {
      CallExpression(path) {
        if (!t.isIdentifier(path.node.callee, { name: "require" })) return;
        const arg = path.node.arguments[0].value;
        const ext = (0, _path.extname)(arg).toLowerCase();
        if (!ext || ext === '.js') return;
        // TODO: Replace with a commented out node instead.
        if (path.parentPath.type === 'VariableDeclarator') {
          console.warn(`babel-plugin-remove-nonjs does not assume variable assignment from "require("${ arg }")". Your program has been possibly broken since the variable "${ path.parentPath.node.id.name }" was erased by us.`);
          path.parentPath.remove();
        } else {
          path.remove();
        }
      }
    }
  };
};