packages/babel-plugin-transform-object-assign/src/index.js
import { declare } from "@babel/helper-plugin-utils";
export default declare(api => {
api.assertVersion(7);
return {
name: "transform-object-assign",
visitor: {
CallExpression: function (path, file) {
if (path.get("callee").matchesPattern("Object.assign")) {
path.node.callee = file.addHelper("extends");
}
},
},
};
});