I'm working in a completely offline environment & lately, I've had to code some react applications. I wonder if there is a way to download npmjs packages manually without using the command npm install <package-name>.
For example, while I'm coding with python in the same offline env, I'm downloading everything from PyPi manually & use the .whl in my offline environment using removable devices from one online environment to the offline environment.
I'll appreciate for any help or direction to the solution.
You need to download their source from the github. Find the main file and then include it in your main file.
You need to find the source and go through the package.json file. There you can find which is the main file. So that you can include that in your application.
To include example.js in your app. Copy it into your application folder.
Once you do that, your requirements will just be:
var moduleName = require("path/to/example.js")
It will always look for a node_modules directory at the root of your app (and a few other places as well).
It's important you download the full repo and not just the lib folder if you plan to use it this way since the package.json file is used to find the main entry point. As long as the repository has a valid package.json file it should work.[
Related
I am quite new to programming and today decided to attempt and create a node.js and puppeteer project with the purpose of scraping website into a .txt file. I ran into issues straight away since for the most part I have no idea what I'm doing. After installing node.js and puppeteer, I was guided by some videos and articles I found to create my first project. In the command prompt using mkdir and later cd I was able to create and access the new directory, but I started running into problems with npm init. It only places the file package.json in the repository, but there isn't a package-lock or node_modules file anywhere. No idea what they do but thought this was a problem. When I open cmd and try to run the app by typing node app.js it returns Error: Cannot find module 'C:\Users\emili\app.js' along with some other gobble. What should I do, to be able to run the simple application I wrote?
It seems that you are missing some key knowledge on how NodeJS works, but in order to fix your issue (for now), you will need to take a few steps.
First, in your working directory (where the package.json is), you'll need to install your modules.
Run npm install puppeteer. This will do two things, create the node_modules folder and create the package-lock.json file.
Create a file named app.js (either manually or by running the command touch app.js) in your working directory, and put the following content inside of it:
console.log('Hello, World!');
Save the changes to app.js and then run node app.js in your terminal. You should see Hello, World! output to the terminal.
The reason npm install puppeteer created the node_modules folder and the package-lock.json file is because they weren't needed beforehand.
When you run npm install PACKAGE_NAME, you're installing a module (otherwise known as a package), thus it creates the node_modules folder so that it will have a place to put the module so that your code can access it. It also creates the package-lock.json file, which is used to track the module versions inside of your project.
With this information, I request you go back to the tutorial you were originally following and try going through it again and attempting to understand each of the core concepts before writing any real code.
I want to try and make some changes to a package published in npm? (I've suggest some changes as an issue but I think they are simple enough for me to attempt them).
https://www.npmjs.com/package/bt-presence#contributing--modifying
The author supplies some information on how to modify the package, but not really enough for someone doing it for the first time.
Where should I clone the GitHub repo to? The folder where the package is installed? I tried it in my home folder and that would not build (unmodified).
The command npm run build - where is this run from? The root folder of the package where the package.json is?
Will I need to modify the package.json?
In general what is the best way to develop something like this for npm? I've worked on packages before but they were simply Javascript.
If you want to work on the bt-presence package in isolation, you can put the cloned repository anywhere. If you want to use your modified version of bt-presence in combination with an application, my recommended approach is to register bt-presence as a dependency in the application's package.json file with the version set to a relative path to your bt-presence repository; then running npm install in the application will make a symlink from node_modules/bt-presence in the application to your bt-presence repository.
npm run build should indeed be run from the root folder that contains the package.json of bt-presence.
If you just want to change the code of bt-presence, you won't need to modify its package.json. You would only modify the package.json if you need to change any of the settings in there, e.g, if you need to add additional dependencies to your version of bt-presence.
None of the above is really specific to TypeScript. (Some JavaScript packages have build processes too if they need to transform or package the JavaScript files in some way.)
I'm building a .Net Core application using Angular for my client-side code. For the most part, I'm using the default template that is included in VS 2017. For whatever reason, VS is making my node_modules folder read only. Before I was able to install packages via command line in the directory that holds my client side code as well as my package.json file and my node_modules folder. Before I was able to do this, but now it is defaulting the folder to read only which is invaliding all of my npm commands. I've verified that this is the case because I can remove the read only attribute via windows explorer and then run any of my commands like npm install.
Has anyone else encountered this before? If so, what did you do to resolve this?
Thanks!
Okay, I found the answer. VS puts a lock on the node_modules folder while it is running.
So, I guess for now if you need to add packages just close VS first.
Per this answer, when you reference a local dependency in package.json the local package will be copied to node_modules. This is not ideal when I'm developing a package and just referencing it from another project as I want to verify the library works correctly within another project. It seems every time I make a change to the library, I have to go back to my consuming project, delete the node_modules/my-library folder and rerun npm install each time for it to copy the library back. If I don't delete the folder first it doesn't seem to copy the latest version over.
If I develop directly inside node_modules/my-library it's not ideal because that folder isn't version controller, unlike the local folder referenced in package.json.
Another option would be to create an example project within the my-library repo, but I'd prefer to go that route as a last resort.
You can use npm link to develop your library and have another project use the local version like so.
For example;
In the my-library directory run npm link.
Then in the project you want to use my-libray run npm link my-library.
This will also work with yarn link.
I would like to download node module packages (listed in a package.json file, in the present working directory) source code to a node_modules subdirectory of the present working directory, without compiling, or installing those modules. Now I have seen the related question download source from npm without npm install xxx but that question dealt with downloading the source code of individual modules specified to NPM directly (i.e., without using a package.json file). The reason why I want to do this is because I am working on developing an Atom package for the Open Build Service (OBS) of openSUSE and this seems like one of the necessary steps I need to go through in order to achieve this.
The source code is not shipped with the npm distributed code. The best you could do is read the package.json and look for the { repository: url { } } key if it exists and if it's a git repo (which most of them will be) clone it.
However be aware that the source code often requires a build step before it can be used, as in an npm prepublish step defined in the source code. In modern Javascript projects a common example of this is transpiling ES6 code to ES5 code for use in NodeJS and the browser.
I have not made an Atom package but I'm fairly certain you don't need to do any of this.