Q&A (please complete the following information)

• OS: [e.g. macOS]
• Browser: [e.g. chrome, safari]
• Version: [e.g. 22]
• Method of installation: [e.g. npm, dist assets]
• Swagger-UI version: [e.g. 3.10.0]
• Swagger/OpenAPI version: [e.g. Swagger 2.0, OpenAPI 3.0]

Content & configuration

Example Swagger/OpenAPI definition:

# your YAML here

Swagger-UI configuration options:

SwaggerUI({
  // your config options here
})

?yourQueryStringConfig

Describe the bug you're encountering

To reproduce...

Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior

Screenshots

Additional context or thoughts

I am using:
{
"swagger-ui": "^3.5.0",
"react": "^16.4.1"
}

const React = require('react');
const SwaggerUI = require('swagger-ui');

class Swagger extends React.Component {
componentDidMount() {
SwaggerUI({
dom_id: "#ui",
url: "http://petstore.swagger.io/v2/swagger.json"
});
}

  render() {
     return <div id="ui" />;
  }

}
error: TypeError: Cannot read property 'slice' of undefined
the error is coming from swagger-ui, I try to comment out the componenentDidMount, and only leave the const SwaggerUI = require('swagger-ui'), the error is still there. Please anyone know how to solve the problem, thx