Let’s say you’re developing a package “A” that have @types/some-module package in devDependencies. For some reason you’re exporting the type from @types/some-module: import { SomeType } from ‘some-module’; export default class APackageClass { constructor(private config: SomeType) { // … } } Right now TypeScript consumers of package “A” are unable to guess what SomeType is, … Read more
Verify that you have the latest version of Node.js installed (or, at least 13.2.0+). Then do one of the following, as described in the documentation: Option 1 In the nearest parent package.json file, add the top-level “type” field with a value of “module”. This will ensure that all .js and .mjs files are interpreted as … Read more
You can use an npm module called depcheck (requires at least version 10 of Node). Install the module: npm install depcheck -g or yarn global add depcheck Run it and find the unused dependencies: depcheck The good thing about this approach is that you don’t have to remember the find or grep command. To run … Read more
Set the environment variable in the script command: … “scripts”: { “start”: “node app.js”, “test”: “NODE_ENV=test mocha –reporter spec” }, … Then use process.env.NODE_ENV in your app. Note: This is for Mac & Linux only. For Windows refer to the comments.
I found that the following code fragment worked best for me. Since it uses require to load the package.json, it works regardless of the current working directory. var pjson = require(‘./package.json’); console.log(pjson.version); A warning, courtesy of @Pathogen: Doing this with Browserify has security implications. Be careful not to expose your package.json to the client, as … Read more
Summary of important behavior differences: dependencies are installed on both: npm install from a directory that contains package.json npm install $package on any other directory devDependencies are: also installed on npm install on a directory that contains package.json, unless you pass the –production flag (go upvote Gayan Charith’s answer), or if the NODE_ENV=production environment variable … Read more