transform-edge-default-params.js

/** Converts destructured parameters with default values to non-shorthand syntax, fixing Edge 16 & 17. */
module.exports = (babel, options = {}) => {
  const { types: t } = babel;
  
  const isArrowParent = p => p.parentKey=='params' && p.parentPath && p.parentPath.isArrowFunctionExpression();

  return {
    name: "transform-edge-default-parameters",
    visitor: {
      AssignmentPattern(path) {
        const arrowArgParent = path.find(isArrowParent);
        if (arrowArgParent && path.parent.shorthand) {
          path.parent.shorthand = false;
        }
      }
    }
  };
};