Check if a node.js module is available

Question

I'm looking for a way to find out if a module is available.

For example, I want to check if the module mongodb is available, programmatically.

Also, it shouldn't halt the program if a module isn't found, I want to handle this myself.

_{PS: I added this question because Google isn't helpful.}

Answer 1

There is a more clever way if you only want to check whether a module is available (but not load it if it's not):

function moduleAvailable(name) {     try {         require.resolve(name);         return true;     } catch(e){}     return false; }  if (moduleAvailable('mongodb')) {     // yeah we've got it! } 

Answer 2

Here is the most clever way I found to do this. If anyone has a better way to do so, please point it out.

var mongodb; try {     mongodb = require( 'mongodb' ); } catch( e ) {     if ( e.code === 'MODULE_NOT_FOUND' ) {         // The module hasn't been found     } }