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Let's understand to the question, why use experts if we have no chance?

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All right.

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So let's get rocking.

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The first point is that experts handle all low level details for us.

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Like I said in the previous video, that if we are using core or vanilla Node.js even to pass a simple

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data into the server, we need to write a lot of code to get it done, but express take away all these

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low level details for us.

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And the next point is that it has a huge developer community.

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Before you use a framework or library, make sure that it has a large developer community, meaning

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that in case you face a back problem, definitely there is someone who has that problem before.

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And the way finding solution to that won't be a problem at all.

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The next point is that express handle what is called data validation and Node.js server.

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You saw that when we are trying to send data into the server, we can send any payload or data into

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the server and to handle validation in Node.js only, it's going to be a little bit difficult, but

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experts make it pretty easy.

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And I will show you as we move on.

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The next point is what we call templating.

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Well, with Xpress we can use template engine like JS to display dynamic data.

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If we are using Node.js, you're going to be a little bit difficult to parse dynamic data into a HTML

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template.

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So what is template engine?

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Well, for this one, we have dedicated video to talk about template engine.

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A template engine is a combination of HTML with JavaScript, meaning that we can write JavaScript inside

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a HTML and we have a video talking about template engine.

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And apart from that, we have what is called routing.

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Well, do you remember on that web server in Node.js?

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Well, let me show you the code we wrote for Node.js server.

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And if you see how we are doing the routing inside Node.js, assuming that inside this particular route

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here or endpoint, you could have millions of code or hundreds of code inside this.

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So if you are using code on JS, routing is going to be difficult for us.

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But with EXPRESS, you're going to take away all this complexity from us to make it really easy for

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routing.

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The next point is what we call session management, and we have a section for this one to talk about

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authentication and authorization, where we talk about session management, talking about cookies and

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many more.

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And the next point is what you call error handling, which express handling error is pretty easy as

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compared to vanilla Node.js.

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So with this one in mind, the next video, let's have a look at the map of Learning Express JS.