这对我有用：

  let myPackage; 
 const myPackageToRequire =‘my-package-to-require’; 
 try {
 myPackage = require.call（null，myPackageToRequire）; 
} catch（e）{} 
 

变量定义 const myPackageToRequire ='my-package-to-require'; 在这里是必需的。

希望我有所帮助。

Example:

let tmp;

try {
  tmp = require('module-name');
} catch(e) {
  return;
}

I get error (react native Metro Bundler):

error: bundling failed: Error: Unable to resolve module `module-name` from ...

How to require "module-name" only if exist?

That's what works for me:

let myPackage;
const myPackageToRequire = 'my-package-to-require';
try {
  myPackage = require.call(null, myPackageToRequire);
} catch (e) {}

The variable definition const myPackageToRequire = 'my-package-to-require'; is necessary here.

Hope I helped.