I written following yaml and I create redoc html.
$ npx redoc-cli bundle petstore.yamlnpx redoc-cli bundle petstore.yaml
tag:
type: string
example: "Test Example"
description: "Test Description"
But example value was not displayed in redoc html.

Why is not example attribute of properties object displayed?
openapi: "3.0.0"
info:
version: 1.0.0
title: Swagger Petstore
license:
name: MIT
servers:
- url: http://petstore.swagger.io/v1
paths:
/pets:
get:
summary: List all pets
operationId: listPets
tags:
- pets
parameters:
- name: limit
in: query
description: How many items to return at one time (max 100)
required: false
schema:
type: integer
format: int32
responses:
'200':
description: A paged array of pets
headers:
x-next:
description: A link to the next page of responses
schema:
type: string
content:
application/json:
schema:
$ref: "#/components/schemas/Pets"
default:
description: unexpected error
content:
application/json:
schema:
$ref: "#/components/schemas/Error"
post:
summary: Create a pet
operationId: createPets
tags:
- pets
responses:
'201':
description: Null response
default:
description: unexpected error
content:
application/json:
schema:
$ref: "#/components/schemas/Error"
/pets/{petId}:
get:
summary: Info for a specific pet
operationId: showPetById
tags:
- pets
parameters:
- name: petId
in: path
required: true
description: The id of the pet to retrieve
schema:
type: string
responses:
'200':
description: Expected response to a valid request
content:
application/json:
schema:
$ref: "#/components/schemas/Pets"
default:
description: unexpected error
content:
application/json:
schema:
$ref: "#/components/schemas/Error"
components:
schemas:
Pet:
required:
- id
- name
properties:
id:
type: integer
format: int64
name:
type: string
tag:
type: string
example: "Test Example"
description: "Test Description"
Pets:
type: array
items:
$ref: "#/components/schemas/Pet"
Error:
required:
- code
- message
properties:
code:
type: integer
format: int32
message:
type: string
$ node --version
v10.15.1
$ npx --version
6.4.1
$ npx redoc-cli --version
0.8.4
Examples are rendered at the right side - where response and request JSON examples are displayed. Each JSON field's value contains value from example property.

Examples are rendered in the right column for payloads.
Thanks!
Most helpful comment
Examples are rendered at the right side - where response and request JSON examples are displayed. Each JSON field's value contains value from
exampleproperty.