How to check in node if module exists and if exists to load?

Question

I need to check if file/(custom)module js exists under some path. I tried like

var m = require(\'/home/test_node_project/per\');
but it throws error

Answer 1

Require is a synchronous operation so you can just wrap it in a try/catch.

try {
    var m = require('/home/test_node_project/per');
    // do stuff
} catch (ex) {
    handleErr(ex);
}