Uncaught Error: Invariant Violation: Element type is invalid: expected a string (for built-in components) or a class/function but got: object

Question

I am getting this error:

Uncaught Error: Invariant Violation: Element type is invalid: expected a string (for built-in components) or a class/funct

Answer 1

Have you just modularized any of your React components? If yes, you will get this error if you forgot to specify module.exports, for example:

non-modularized previously valid component/code:

var YourReactComponent = React.createClass({
    render: function() { ...

modularized component/code with module.exports:

module.exports = React.createClass({
    render: function() { ...