Function Blend Anti-Pattern

function.js

async function entryPoint(context) {
  if (context.req.method === 'GET') {
    // it is a "get single resource"  operation
  } else if (context.req.method === 'PUT') {
    // it is a "replace resource" operation
  } else {
    // must respond with 403 forbidden or not supported
  }
}