Use a factory or JSX

react_legacyfactory.md React Element Factories and JSX You probably came here because your code is calling your component as a plain function call. This is now deprecated: var MyComponent = require('MyComponent'); function render() { return MyComponent({ foo: 'bar' }); // WARNING } JSX React components can no longer be called directly like this. Instead you can use JSX. var React = require('react'