* {Array}
+ Stability: 0 - Deprecated
+
Instruct `require` on how to handle certain file extensions.
Process files with the extension `.sjs` as `.js`:
require.extensions['.sjs'] = require.extensions['.js'];
+**Deprecated** In the past, this list has been used to load
+non-JavaScript modules into Node by compiling them on-demand.
+However, in practice, there are much better ways to do this, such as
+loading modules via some other Node program, or compiling them to
+JavaScript ahead of time.
+
+Since the Module system is locked, this feature will probably never go
+away. However, it may have subtle bugs and complexities that are best
+left untouched.
+
## __filename
<!-- type=var -->