I am looking at the following tutorial https://github.com/jakblak/thinkster_mean_app/blob/master/app.js and can see that require('path') is present in the app.js. However, package.json does not seem to explicitly install it? So where is path being taken from? Is it present by default?
path is a NodeJS built-in module, so there is no need to add it over npm. Its already available when you install NodeJS like Console module or os module.
Here is the available path documentation which can give you more details about path itself.
And here is the list of all built-in modules and high-level concepts.
Related
I have the following based on instructions from here:
const Pubgapi = require('pubg-api');
const apiInstance = new Pubgapi('api-key');
For some reason when I run it, the console says unable to resolve path but it's looking for a node-modules which I don't have. This is an API wrapper that I am trying to use by the way. What could cause it to give me this error?
I did an npm install as the instructions said and nothing else before the statements above.
Error message:
Unable to resolve ../node-modules/pubg-api" from ".//components/Main.js`: The module `../node-modules/pubg-api` could not be found"
I have checked the node_modules folder. It is indeed pubg-api, not pubg_api. Requiring pubg_api gives me this error.
This error is probably related to the HTTPS library that the library you are trying to install depends on. Node.js libraries are not compatible with react-native since it is not working on a Node.js platform.
To overcome this issue you can try to use react-native-http library, but I did not try to use it before, so I'm not sure if it's going to work or not.
I am new to nodejs packages and what I understood was that to share code you had to do a module.export (in addition to adding a package.json)
For example bootstrap-select does not have an export function but is available on npm.
So my question is do all modules require an export and also can I do a require('bootstrap-select') in my code?
no, all npm modules do not require an export. npm is now being used more generally for not only javascript packages intended for use under node.js but front end code for browsers, CSS libraries, etc. At the very least, an npm package could just deliver a payload of files not even including any javascript, such as some images, some CSS, some HTML, etc.
So you can only do require('some-module') if that package has either an index.js file or has set the main property in it's package.json file properly.
However if you are authoring a javascript module for node.js, then yes you'll need to export something in order for your module to load properly.
No, npm modules do not require doing something with module.exports. If you do not touch that object, requireing your module will return an empty object (since that is the default for module.exports. However, this can be useful if your module is only intended to be required for side effects, rather than a return value.
For example, the module you linked to modifies global state by attaching a jQuery event handler.
As per i know ,
1.All npm modules are not required to build an app.
2.If we use var bootStrap = require('bootstrap-select'); using bootStrap variable you can access bootStrap module.
so we can pass that object in anywhere of your code
3.To install a dependency modules,
In package.json give dependency block as like this
"dependencies": {
"express": "2.3.12",
"jade": "latest",
"redis": "0.6.0"
}
you can change and edit your packages. then enter a command npm install in command prompt it will install only dependency modules.
If i made any mistakes please correct me Thanks.
I'm trying to figure out how to use external javascript libraries in the Atom editor. I used npm to install the momentjs library, since Atom uses node. However, I'm puzzled as to what to do now? I can't find a way to use the library in Atom.
I thought that I could go to the Atom init.coffee file and do a require "moment" (also tried require "momentjs") but nothing seems to work.
The whole reason behind this is so I can use some javascript libraries for formatting dates in a snippet (I have another SO question about that which I'll close if this solves it).
But this question is a general question about installing and running javascript libraries in Atom. I've looked through the Atom docs and Googled, but I can't find a good answer. I figured something like this would be pretty easy?
As Atom bundle its own node version (and thus is not using your global version(s)) it won't load globally installed modules through require.
However, the require method supporting absolute paths, you can still load any module if you know it's absolute path, which shouldn't be a problem in your specific case.
In your init script you can write:
momentjs = require('/path/to/momentjs')
But beware of modules that ships with binaries. Atom is using node 0.11.13 so if the module you're trying to require have been installed for a different version you'll get a Error: Module did not self-register.. In that case I'm afraid the only solution would be to install the module as a dependency of an Atom package (as suggested by #nwinkler).
You should be able to do the following when developing your own package:
Install moment using npm install --save moment - this will install the moment.js library as a dependency and register it in the package.json file
In your library, import it in your lib file:
moment = require 'moment';
myDate = moment().format();
Then you can use the moment object to format your timestamps.
All of this will only work if you're doing your own package, of course. Not sure if this will work with simple snippets as well.
So I am experimenting with nodejs, and have chosen frappe as a skeleton for learning (as I already use coffeescript on the frontend blah blah blah). Anyway I am just getting started and have encountered a problem, so noobish, I can't find an answer on google. The picture above should say it all.
What is wrong with my path to /config/globals ? I have tried:
./config/globals
/config/globals
globals
To no avail. What am I missing here?
path should be ./globals since you require a file from the same directory.
../config/globals would also work.
A require value with no path information looks for a module loaded by npm either locally inside node_modules, or in the global npm location.
So I'm following:
http://giantflyingsaucer.com/blog/?p=894
and installing node.js.
I got up to the part with sudo make install.
It works, then it says to create a js file.
What I don't understand is where I put the sayhello.js?
Node.js looks at least for the programmer more like a interpreter. Thus, you can place your sayhello.js whereever you want and run it by executing node sayhello.js.
However, you might consider using external modules. Then you must check that they are set by full path or the relative path can be resolved from the location you execute node in.