How generate nodejs express dependencies package.json

Question

As I started to develop my first nodejs express application, I added many packages with npm.

I would like to know if there is a way to generate a package.json file containing all the current dependencies or the list of the current packages under the nodes_modules directory.

Answer 1

Just run npm init in the same directory as your project.

You'll be asked a list of questions (name, version, description, etc.) and once complete, it will generate a package.json file with all of the dependencies as currently installed in the node_modules directory.

Answer 2

Run npm list to see what you have installed. Run npm shrinkwrap to build a npm-shrinkwrap.json file, which you can use as a starting reference to build a proper package.json . My workflow is always to update package.json and then run npm install . I never run npm install foo to get some package because it creates risk of forgetting to add it to package.json and then having your application fail to start on deployment.

Updated to add : These days I do run npm install --save foo or npm install --save-dev foo since I have now decided the ~0.4.3 version numbers it adds to package.json are better than my former preference for 0.4.x since the ~ gives you a more precise minimum version number.