I am trying to run a pre developed example in node.js environment. But i keep on getting the following error:
Cannot find module '/build/default/validation'
Am I missing some module installation from npm here...? I have installed all the other modules like socket-io, websocket, websocket-server, websocket-clien, etc.
-Parag
Check the package.json file for all required modules. Run npm install and npm update to automatically install all required modules and update them.
Usually, npm modules are in a folder *node_modules*, so /build/default/... looks like some custom module that should be shipped with the example.
Related
I have installed the tar-module using
npm install -g tar
When I type
npm list -g --depth=0
I can see the entry tar#6.1.0 in the module-tree, however when I try to require it in a js-file const tar = require("tar"), I get the error message
Uncaught Exception:
Error: Cannot find module 'tar'
What am I missing?
The issue here is that you're trying to use something installed globally in a local project. You should be able to use your libraries if you install them inside the project with npm i tar.
The reason we install something globally is for use during development on many projects. This way, we don't have to install a tool on every project. With something you want to use inside a projects code however, you should install it on a project level. This way everything that the project needs to work lives inside of the project itself. You should see all dependencies listed inside of your package.json file
Not gonna advocate you do this, but if you really want to include the globally installed library, you can do something like this:
require('./../../.npm-global/lib/node_modules/tar'); // Relative path to library
Where you go up the file directory to your $HOME directory into the default global install location for node and bring it in. This is poor practice, please don't do it, but heres the info none-the-less.
I am trying to use the twilio node.js library with my meteor application. I was able to install the package using meteor npm install --save twilio
and it installed correctly. However, when I use import twilio from 'twilio'; I get this error
Error: Cannot find module 'crypto'(…)require # modules-runtime.js?hash=637cb12…:119meteorInstall.node_modules.twilio.lib.webhooks.js # modules.js?hash=9468cd4…:38774fileEvaluate # modules-runtime.js?hash=637cb12…:191require # modules-runtime.js?
Any thoughts on how to fix this. Seems to be a meteor error.
Normally, when you hit the command meteor npm install it should create a folder name meteor-node-stubs (/node_modules/meteor-node-stubs) in which the dependencies such as crypto etc. is arranged.
I think there is a problem with this folder in your project. My suggestion is to check whether you have this folder.
If you do not have it, you can try to install it by meteor npm install --save meteor-node-stubs That should solve your problem if this is the case
I keep getting the error: Cannot find module 'serve-favicon.' This error occurs not just for serve-favicon but for all core modules which also includes 'body-parser', 'cookie-parser', etc. I am using IntelliJ IDEA (version: 2016). I already enabled the Node.js Core library, and I have been able to use core modules in other projects successfully. What is different about this project however, is that I pulled it from github. Do I need to install another plugin? If yes, which one? Do I need to add another package?
serve-favicon, body-parser, cookie-parser are not node.js core modules.
You will need to install these dependencies from npm registry. To install these dependencies, you will need to run
npm install <package-name> --save
If you have pulled the project from github, chances are there will be a package.json file with a list of dependencies. In that case, all you need to do is run npm install from the project folder.
I am new to Electron (Atom-shell), and I am trying to load a NodeJS plugin into the application I am building, but I don't know how. The documentation is not clear on that.
For instance, I am trying to use sqlite3 plugin in my app, I used npm install sqlite3, and it was successfully installed. But the application throws and error when I try to call it var sqlite = require('sqlite3'). Are there any further steps I am not aware of ?
Thanks.
For pure JS (i.e. not native) modules you need the following:
Have the module listed in your package.json dependencies
Let electron know where to find the module (e.g. export NODE_PATH=/PATH/TO/node_module)
The first requirement is obvious and the second has its roots in this issue.
For native node modules (such as sqlite3) which use C++ bindings, you need to build them against electron headers to work. According to electron docs, the easiest way to do that would be:
npm install --save-dev electron-rebuild
# Every time you run npm install, run this
./node_modules/.bin/electron-rebuild
To install the npm modules correctly you should go into the folder of your electron app and install the module via npm.
npm install --save sqlite3
The flag --save is important, because npm will install the module inside your app.
Afterwards the require should work.
I'm studying node.js
and I am making the exercises from a book
https://github.com/marcwan/LearningNodeJS/blob/master/Chapter05/05_series.js
I have a problem with an example in which you invoke the module async.js
when I go to run the example I get the error
"can not find module 'async'"
in the folder where you installed node
I checked that there is a module
I also downloaded this package
https://github.com/caolan/async
and launched the test file that works properly
the first question that you do, even if it seems correctly installed the module, there is a command to verify that a module is installed and that you can recall?
the second question is, why is this wrong example?
thanks
To install a package, use npm install package_name.
When that's done, you can easily require that package and use it in your application.
const package = require('package_name');
To install a package globally (so you don't have to install it in every project you create) add -g flag
npm install package_name -g
You should be using npm, not downloading packages from github manually: npm install async.
npm will install the module into a node_modules subdirectory of the directory that you run it in. That directory must be your examples folder, or an ancestor. See: https://nodejs.org/api/modules.html#modules_loading_from_node_modules_folders