In this tutorial, we will learn how to fix the rm is not recognized as an internal or external command issue. Show
When we try to remove a folder or file using the Output:
This error has occurred because the To fix the error, replace
the The npm script you are running is In react_redux_express_starter boiler player there is no bin or www folder. so i guess either you copied a package.json from another boilerplate or messed up with filed structure or running the command in a wrong directory. Next Generation Web App BundlerThis post has been published first on CodingTheSmartWay.com. Subscribe On YouTube If you’re a web developer you have most certainly made some experience with bundlers like Browserify or Webpack. Those web application bundlers help you to pack the assets of your web application (code, images, packages etc.) into bundles so that the application can be served easily. Furthermore most bundlers are able to perform many more tasks when building a web application like post processing of code or structuring your application for supporting lazy loading. However, today most developers struggle with the complicated configuration of bundlers like Webpack. Parcel, a web application bundler, which has been released a few weeks ago is here to solve the problem. The promise is that Parcel is a lot faster then Webpack or Browserify and that the bundler at the same time is requiring no configuration (in most cases). Let’s take a closer look at Parcel and see how you can use Parcel in your next web development project. InstallationThe project’s website can be found at https://parceljs.org/: From the start page of the website you can get an overview of the most important features of Parcel:
To install Parcel you need to perform the following steps. First install Parcel globally on your system by using NPM or Yarn. Using Yarn you need to execute the following command:
Using NPM you need instead execute the following command:
Having installed Parcel on your system successfully we can now make use of Parcel in a new web project. Initiating A New Project With ParcelTo initiate a new project let’s create a new empty project folder, change into that folder and execute one of the following commands: With Yarn:
With NPM:
This creates a new package.json file in your project directory. To add an entry point for our application let’s add a new file index.html in the project directory and insert the following HTML code into that file: <!DOCTYPE html> This is just a simple HTML structure. In the body section of you can find two elements: a div element with id message and a script element to include the JavaScript file app.js. The file app.js is not existing yet, so let’s create this new file in the project directory and insert the following line of code: document.getElementById('message').innerText = "Hello World!"; This line of JS code is inserting the text “Hello World” into the div element with id message, so that the text should become visible in the browser. Now let’s start up the development web server by using the following command:
The web server is starting up on port 1234 and if you open up URL http://localhost:1234 in the browser you should be able to see the following output: You can now update any part of the code (e.g. change the message text) and you’ll see the output in the browser being updated automatically. If you now take a look into the project folder you’ll notice that two new folders have been created by Parcel: The .cache folder contains the Cache content which is used by Parcel. The dist folder contains the output of Parcel and the content of that folder is served by the web server. Inside the the dist folder you can see that for our application one JS bundle has been created. Adding A Module To The ProjectLet’s extend the sample project by creating a new JS module. Parcel supports both, CommonJS and ES6 module syntax. In the following example the ES6 syntax is used. If you want to use the CommonJS syntax instead you can do so without needing to change any configuration. Add a new empty file lib.js to the project and insert the following JavaScript code: export function square(x) { This is exporting the function square from the lib module, so that you can add the corresponding import statement in app.js: import { square } from './lib'; You we can make use of that function in app.js: document.getElementById('message').innerText = "The Square of 2 is " + square(2); The output now changes to the following: The new module has been added to the bundle that was created by Parcel automatically. If you need to add dependencies to your project, that’s also no problem and Parcel will add the needed dependencies to the bundles as well. E.g. add the jQuery library to the sample project by executing the following command in the project directory:
You can now include jQuery by using the corresponding import statement and extend the example in file app.js with the code you can see in the following: import { square } from './lib'; Now the user is able to click on the message text and increment the input value by one. The square of that value is updated as well. The jQuery has been added to the Parcel bundle without anything to do manually. Adding CSS and SCSS AssetsOf course Parcel takes care of your CSS and SCSS assets. Those assets are automatically recognized and added to the bundle which is created for your project. You need to import CSS assets in a JavaScript or HTML file. E.g. add a new file styles.css to your project directory, insert the following CSS code: body { and make sure that styles.css is included in index.html by added the following link element to the head section: <link rel="stylesheet" href="styles.css"> The output in the browser should then change to what you can see in the following: If you want to use SCSS code instead you first need to add the node-sass package first: $ npm install node-sass Then add a new file styles.scss to the project and insert for example the following SCSS code: $messagecolor: blue; And import that file in any JS file, e.g. in app.js with the corresponding import statement: import './styles.scss'; The result in the browser should be the same as seen before. Applying TransformationsLike many other bundlers Parcel is able to apply transformations to assets when building. Out of the box Parcel has already support for many common transforms and transpilers built in. Here are some examples:
Parcel automatically runs those types of transformations when the corresponding module is installed and a small configuration file for the transformation (e.g. .babelrc) is available. In the following exampel we’ll discover how to use Babel to transform JavaScript and JSX code by setting up a React project with Parcel. Example: Setting Up A React Project With ParcelGetting started with React has always been a difficult task with Webpack. Initiating a new React project required to add a lot of Webpack configuration to the project first. To make things easier it has been possible to use Create React App (https://github.com/facebookincubator/create-react-app) to initiate a new React project and generating the needed Webpack configuration automatically. However, this disadvantage of the Create React App approach is that it hides the complexity of the build configuration. This only works for small applications. If your application grows and you have further requirements for the build process you need to deal with the complex configuration anyway. Using Parcel makes setting up a React project much more easier because there is nearly no configuration required. $ mkdir react-parcel Next add the following dependencies to the project: $ npm install --save react In order to tell Parcel that we’re using ES6 and JSX syntax in our project we need to add a new file .babelrc and include the following minimal configuration for Babel: { Next let’s create a simple React app by adding two new files two the project: index.html and app.js. First insert the following code in index.html: <!DOCTYPE html> Next add the implementation of the React component in app.js: import React from "react"; Now we’re ready to start up the React application by simply typing in the following command:
and you should be able to see the application running in the browser: Building For ProductionIf you want to build your project for production you can use the following command:
This command creates a dist sub folder where the generated output is stored. You can then use the content of this folder to deploy the application. You can also specific the folder which should be used for outputting the production build by using command option -d in the following way:
The production build process uses minification in order to decrease the bundle size. This post has been published first on CodingTheSmartWay.com. Top Online Course Recommendations #1 The Complete Web Developer in 2018Learn to code and become a web developer in 2018 with HTML5, CSS, Javascript, React, Node.js, Machine Learning & more! #2 The Complete JavaScript Course — Build a Real-World ProjectMaster JavaScript with the most complete JavaScript course on the market! Includes projects, challenges, final exam, ES6 Disclaimer: This post contains affiliate links, which means that if you click on one of the product links, I’ll receive a small commission. This helps support this blog! How do you fix is not recognized as an internal or external command operable program or batch file?You can resolve this issue in three ways: First, use the full path of the executable file to launch the program. Second, add the program path to Windows environment variables. Finally, move the files to the System32 folder.
How do I install a parcel in Vscode?How do I install a parcel in Vscode?. Step 1 – Initiate npm. We can initiate npm by executing the command “npm init” from the terminal section of the Visual Studio Code.. Step 2 – Install Parcel.. Step 3 – Update Scripts.. Is not recognized as an internal or external command batch file?The “is not recognized as an internal command” error usually occurs because the computer can't find the executable that you're asking it to launch. However, you can provide it with the full path to your executable file and it should then be able to run it without any issues.
Why is not recognized as an internal or external command?The “Python is not recognized as an internal or external command” error is encountered in the command prompt of Windows. The error is caused when Python's executable file is not found in an environment variable as a result of the Python command in the Windows command prompt.
|