FAQ: Middleware - Route-Level app.use() - Single Path


This community-built FAQ covers the “Route-Level app.use() - Single Path” exercise from the lesson “Middleware”.

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This exercise can be found in the following Codecademy content:

Web Development

Learn Express

FAQs on the exercise Route-Level app.use() - Single Path

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Just wondering, in the description of step 6 it says this:

app.use('/sorcerer', (req, res, next) => {
  console.log('User has hit endpoint /sorcerer');

In the example above the console will print 'User has hit endpoint /sorcerer' , if someone visits our web page’s ‘/sorcerer’ endpoint. Since the method app.use() was used, it won’t matter if the user is performing a GET ,a POST , or any other kind of HTTP request. Since the path was given as an argument to app.use() , this middleware function will not execute if the user hits a different path (for instance: '/spells' or '/sorcerer/:sorcerer_id' ).

However, in the exercise it seems that the middleware defined on path ‘/beans/:beanName’ will also respond to requests to ‘/beans/:beanName/add’ and ‘/beans/:beanName/remove’.

So, what exactly is the rule here? will a middleware respond to any request with a URL that is underneath the given path?