The document object is not available to Node.js because it is part of the browser. Visual Studio Code is available for MacOS and Windows, too. Use the Ubuntu Software library to install Visual Studio Code. One of the technologies that the text editor Visual Studio Code was designed for is Node.js. If using MacOS or Windows, go to to download and install it. If Node.js is not already installed, then issue a sudo apt install nodejs command which will install it. This will show if Node.js is already installed on the machine. If not already at the terminal, open up a terminal window. From a command prompt/terminal: mkdir node_project and cd node_project It can safely be installed on a virtual machine in the cloud if hardware is unavailable.įirst, create a directory to work from. This tutorial will use an installation of Ubuntu Linux v.18.04 to proceed with. Node.js is built around asynchronous command/operations. Instead it is has several new objects for doing things like reading and writing data or creating HTTP servers, to name a few common ones. Objects specific to the browser are not included in Node.js. In 2009, Ryan Dahl got the idea to run JavaScript without the browser, so he embedded it in a program written in C++ and named it node.exe. Node.js uses Google's latest JavaScript engine which translates JavaScript code to run on a machine. Node.js has a large number of open-source libraries written for it to make it even better. While JavaScript in the browser is very messy, it can be written using the latest specification in Node.js which means that clean, efficient code can be written. Node.js is a rapid application development (RAD) tool. This will just tie-up the system and degrade performance. It is not for computationally intensive applications like data encoding. Node.js is highly-scalable and is generally for data-intensive, or I/O-intensive, apps. It is a runtime environment for running JavaScript code without an Internet browser and is popular for building server API's. Node.js is not a programming language or framework. In the first part of this post we create a node.js server with an express app.If not familiar with JavaScript then read this tutorial which covers a version of JavaScript compatible with most Internet browsers. It is very important you understand this base before going further. If the page is not found the return status code will be 404.įor reference here a list of some HTTP status codes:ĥ00 : Internal Server Error I dont understand a word of what you just explain If everything work as expected the status code is 200. The server will include a status code with every response he send back to the browser. What append if the asked page is not present on the server. So asking for facebook/about page is a GET request. When a browser send data to the server that's call a POST request When the browser ask for information that's call a GET request. Your browser can ask for a page but your browser can also send data to the server (ex. Here are more examples of different url path. This protocol of requests and responses enables you view this page in your browser.įor example, when you visit /about, your browser request the about page from facebook server.įacebook server will then find and match your request path, will do the processing and send the response associate with this path. To access a page on the internet, your browser must ask the server for the page it want (request), and then display that page to you (response). Understand the basics of how your web browser communicates with the internet In your terminal execute:Įnter fullscreen mode Exit fullscreen modeĥ000 is the port number. If you dont have this basic understanding, you can read this small series that cover all node.js setup and basic concept: Install and setup Expressįirst we will create a new folder and a start a new app, then we will install Espress. You also need to understand node.js basic concept. To use Express we need a working version of node.js already install on our machine. Express is a backend framework that will complement a frontend framework to build full stack applications Web Application: Express is a minimal and flexible Node.js web application framework that provides a robust set of features for web and mobile applicationsĪPIs: With a myriad of HTTP utility methods and middleware at your disposal, creating a robust API is quick and easy.Įspress is not a frontend framework like React or Vue. It is also by far the most popular Node.js web framework. Express is a Fast, unopinionated, minimalist web framework for Node.js.
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