Software Development

Express in Action by Evan M. Hahn

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By Evan M. Hahn

Show in motion is a delicately designed instructional that teaches you the way to construct net purposes utilizing Node and Express.

Express in motion teaches you the way to construct net purposes utilizing Node and show. It starts off by means of introducing Node's robust features and indicates you ways they map to the positive factors of show. You'll discover key improvement options, meet the wealthy surroundings of significant other instruments and libraries, and get a glimpse into its internal workings. by way of the tip of the booklet, you'll have the ability to use exhibit to construct a Node app and understand how to check it, hook it as much as a database, and automate the dev method.

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Express in Action

Exhibit in motion is a delicately designed educational that teaches you the way to construct net purposes utilizing Node and Express.

Express in motion teaches you ways to construct internet functions utilizing Node and convey. It starts off by way of introducing Node's robust characteristics and indicates you the way they map to the gains of show. You'll discover key improvement thoughts, meet the wealthy environment of better half instruments and libraries, and get a glimpse into its internal workings. through the tip of the ebook, you'll manage to use convey to construct a Node app and know the way to check it, hook it as much as a database, and automate the dev approach.

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6 The obligatory Hello World Every introduction to a new code thing needs a Hello World, right? ” We’ll delve into this in much greater detail throughout the book, so don’t worry if not all of this makes sense right now. Here’s Hello World in Express. "); }); Starts the Express server on port 3000 and logs that it has started Once again, if not all of this makes sense to you, don’t worry. ”, and starting your app on port 3000. There are a few steps you’ll need to do to run this—all of that will become clear in the next couple of chapters.

Json. json file should look similar to the one in the next listing, but it will now have the latest version of the Mustache package. 0" } Your dependency version may be newer than this. json. json is so that someone else can install the dependencies later if you give them the project—they need only to run npm install with no arguments. json but they don’t come with the actual dependency files (they don’t include the node_modules folder). Now that you’ve installed it, you can use the Mustache module from your code, as shown in the listing that follows.

Routing—Routing is a lot like middleware, but the functions are called only when you visit a specific URL with a specific HTTP method. com/about. Extensions to request and response objects—Express extends the request and response objects with extra methods and properties for developer convenience. Views—Views allow you to dynamically render HTML. This both allows you to change the HTML on the fly and to write the HTML in other languages. You’ll build a simple guestbook in this chapter to get a feel for these four features.

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