COMEÇANDO COM NODE.JS EM 2022 Rocketseat・2 minutes read
Node.js is a platform for server-side JavaScript used by major companies like Uber and NASA, allowing for quick application deployment and offering multiple frameworks like Express.js. The text outlines the process of setting up a server, defining routes, handling product data, and managing file operations within a Node.js application, providing a foundational understanding for further development in the field.
Insights Node.js is a platform, not a programming language, allowing server-side JavaScript execution and is utilized by major companies for quick application deployment. Express.js, a popular web framework for Node.js, is essential for creating servers, defining routes, handling requests, and accessing HTTP methods, providing a foundational knowledge for developing backends and APIs. Get key ideas from YouTube videos. It’s free Summary 00:00
Node.js: Fast, Flexible Web Framework Platform Express.js is a fast, flexible, and minimalist web framework for node.exe. Node.js allows running JavaScript on the server side, expanding from browser-side usage. Node.js is not a programming language but a platform for server-side JavaScript execution. Node.js is utilized by large companies like Uber, PayPal, and NASA for quick application deployment. To install Node.js, choose between the LTS version for production or the current version for testing. Visual Studio Code is a recommended text editor for Node.js development. Node.js can be used to develop backends, REST APIs, websockets, and streams. Popular frameworks for Node.js development include Express.js, Adonis.js, and Nest.js. npm is the package manager used with Node.js for installing dependencies. The package.json file in Node.js manages dependencies and scripts for development and production environments. 15:49
Creating Node Server with Express Framework A node consists of modules, forming a package of modules. Upon installation, a node includes default packages for creating a server and application. The goal is to create a server and application to access via HTTP methods. An HTTP module will be utilized to create the application. The "Create server" function within the HTTP module is crucial for server creation. The server listens on port 4001 and displays a message when running. To run the server, the command "node server.js" is used. Routes are defined based on URLs, directing requests accordingly. Express.js, a web framework for Node, is introduced as a helpful tool. Installation of Express.js is done via "npm install Express" in the terminal. 33:41
Automate Node Application Deployment with Express Parameters Access the first route and modify it to return a Geison instead of the current output. Utilize the expulsion.de Zone to avoid the need for the Jason string Fairy. Implement a node library to automatically load changes in the application without manual server uploads. Execute npm install in the demon to install necessary dependencies. Define a script in the foot of Jason to run the application, specifying the script name and file to run. Encounter an issue with script creation due to confusion during dependency installation. Create a post route to insert a product, defining the route as slash product. Receive product information through the body of the request using Bari taubare. Explore different types of parameters in Express, including Route parameters and key-value parameters. Utilize destructuring to extract specific information from parameters and create a new object for product insertion. 50:19
Product Management Routes and Operations Create a route named slash product to list all registered products, returning a JSON response with the products. The route retrieves products from memory, explaining why an empty array may be returned initially due to memory reset. Another route is created to return a specific product by ID, using route parameters to identify and retrieve the product. The process involves destructuring the route parameter to access and find the specific product within the array. Changing product information is facilitated through a route that receives the product ID and new data to update the product in the array. The update process involves finding the index of the product in the array and replacing it with the new information. A message confirming the successful product change is returned upon completion of the update. A route for removing a product is created, requiring the product ID to locate and remove the product from the array. The removal process involves using the splice method to eliminate the specified product from the array. Upon successful removal, a message confirming the product's deletion is returned, showcasing the application's progress in handling basic operations. 01:08:09
File Management in Node.js Applications To create a file within an application, ensure there is no existing file named products.de, convert the data to JSON format, and insert product information to generate a new file. To retrieve information from the file, use a function to read the file and parse the data back to object format before making requests to display the information accurately. Implement a function to update the file with new product values whenever changes are made in the database, ensuring synchronization between the database and the file. When removing an item from the database, ensure the file is updated accordingly to reflect the changes made, maintaining consistency between the database and the file. The process involves creating a server using Node's native modules, mapping URLs, utilizing Express framework for routing, installing necessary packages like crypto and file system, and implementing data insertion and retrieval structures. Understanding the basics of creating a server, using Express, and manipulating files within an application provides a foundational knowledge for further development and utilization of different frameworks and technologies in Node.js.