Can You Dynamically Import ES6 Modules Based on Variables?

How to Import Modules Dynamically with ES6 Import

In modern JavaScript applications, importing modules using ES6 import syntax is a common practice. However, what if you want to import a module dynamically based on a variable name?

The Limitations of ES6 Import

Unfortunately, the import statement in ES6 is statically analyzable, which means it cannot depend on runtime information. This means you cannot directly import a module based on a variable name.

Alternative Solution: Loader API

To achieve dynamic module importing, you can use the Loader API (a polyfill). This API allows you to load modules dynamically using the System.import method. Here's how it works:

<code class="javascript">System.import('./utils/' + variableName).then(function(m) {
  console.log(m);
});</code>

This code will dynamically import the module from the path constructed using the variableName and then execute the provided callback with the imported module.

Consider Compatibility

When using the Loader API, it's important to consider compatibility with different JavaScript environments. Some browsers and node versions may not support the Loader API by default. It's recommended to use a polyfill to ensure compatibility.

Conclusion

While the import statement in ES6 is statically analyzable, you can use the Loader API (polyfill) to achieve dynamic module importing based on variable names. This approach provides flexibility and allows you to create more dynamic and reusable code.

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