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

to check in Node if module exists and if exists to load, we add a try-catch block.

For instance, we write

try {
  const m = require("/home/test_node_project/per");
} catch (ex) {
  handleErr(ex);
}

to call require to require the /home/test_node_project/per module.

If the module can’t be included, then the catch block runs.