Your web application is really taking shape. Now you need REST API's that allow UI clients to access your data.

Your task this week is to provide new API routes for each of these data methods:

get all items

get a single item

delete an item

add or update an item

Most routes can support a GET request, but your add route will need to support a POST request.

Each API route should:

support cross$-$origin access,

accept necessary request query parameters or request body,

return appropriate JSON data on success,

return an error status code and message if something went wrong,

Hints

No changes are required to your UI$,$ existing data methods, or existing server routes.

You can use Postman Links to an external site. for API testing

See the class notes on cross$-$origin resource sharing,

Add this command to your index.js file to handle POST requests with a JSON body:

app.use$($express$.$json$())$; $//$Used to parse JSON bodies

Consider how you will determine whether an item should be added or updated.

MongoDB's insert$(),$ update$(),$ and remove$()$ methods return a result object that indicates the number of records affected. You can use that to return success or failure information to the client.