Render React element from object value

Question

I want to create an object:

import React from "react";
import { Registration } from "../../";

const RouteObj = {
  Registration: {
    route: "/registration",
    comp: <Registration />
  }
};
export default RouteObj;

And then, in a second file call:

import React from 'react';
import RouteObj from ...

class Thing extends React.Component{
  render() {
    <RouteObj.Registration.comp />
  }
}

When trying this, I get the error:

React.createElement: type is invalid -- expected a string (for built-in components) or a class/function (for composite components) but got: undefined. You likely forgot to export your component from the file it's defined in.

Is it possible to render React components in this way?

kind user · Accepted Answer · 2017-11-07 13:28:24Z

6

Registration is already a tag (a component), that's why I guess you have to use curly brackets instead.

import React from 'react';
import RouteObj from ...

class Thing extends React.Component{
  render() {
    <div>
      {RouteObj.Registration.comp}
    </div>
  }
}

answered Nov 7, 2017 at 13:28

kind user

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2 Comments

SummmerFort Over a year ago

Is there a way to pass props to the RouteObj.Registration.comp component?

kind user Over a year ago

@SummmerFort Yes, you can use cloneElement function. React.cloneElement(RouteObj.Registration.comp, props). props is an object with your props.

Andrew Li · Accepted Answer · 2017-11-07 13:28:58Z

1

You've got to export RouteObj correctly, as the default export.

Thus, add this after you declare RouteObj:

export default RouteObj;

You were trying to use something you didn't export, as the error says. It was thus undefined.

You can't create an element from an element, you need to create an element from a component class. So instead, you have to set RouteObj.comp to Registration, the component class itself, not an instance of Registration, <Registration />.

So, instead, this is what comp should be:

comp: Registration

answered Nov 7, 2017 at 13:28

Andrew Li

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1 Comment

Ben Irving Over a year ago

Sorry, I will edit the code, I am exporting it correctly. Wrapping {RouteObj.Registration.comp} works as above!

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