OAS3 request bodies without "examples" display an empty "Examples" combobox

[hkosova]

This issue was originally reported on Stack Overflow.

Q&A (please complete the following information)

• OS: Windows 10
• Browser: any
• Method of installation: https://editor.swagger.io
• Swagger-UI version: 3.23.0
• Swagger/OpenAPI version: OpenAPI 3.0

Content & configuration

Example Swagger/OpenAPI definition:

openapi: 3.0.2
info:
  title: test
  version: 1.0.0
paths:
  /foo:
    post:
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/Foo'
      responses:
        201:
          description: Created

components:
  schemas:
    Foo:
      type: object
      properties:
        foo:
          type: string
          example: bar

Describe the bug you're encountering

The "Request body" section displays an empty "Examples" combobox in addition to the auto-generated examples. The issue was introduced in v. 3.23.0 by /pull/5427.

Expected behavior

No "Examples" combobox - because the request body does not have examples.

Screenshots