Run function in script from command line (Node JS)

manpreet Best Answer 3 years ago

I'm writing a web app in Node. If I've got some JS file db.js with a function init in it how could I call that function from the command line?

manpreet 3 years ago

No comment on why you want to do this, or what might be a more standard practice: here is a solution to your question.... Bear in my the type of quotes required by your command line may vary.

In your db.js, export the init function. There are many ways, but for example:

module.exports.init = function () {
  console.log('hi');
};

Then call it like this, assuming your db.js is in the same directory as your command prompt:

node -e 'require("./db").init()'

To other readers, the OP's init function could have been called anything, it is not important, it is just the specific name used in the question.