How to use swagger in our express app ?

Swagger is an open-source framework that enables developers to design, document, and consume Restful APIs effortlessly.

The directory structure of project

We will use some steps

Step 1: install "swagger-ui-express" and "yamljs" package in apps by use command

npm install swagger-ui-express yamljs        

step 2 : we will include some configuration in our index.js file. Use green bold configuration in index.js

Step 3: Create swagger.yaml file in root directory .

In yaml we write swagger instruction for API. I write here for about Api which use CRUD operations.

Step 4: open localhost:9000/api-docs/ to view swagger UI

I used below for reference https://swagger.io/