This feature exposes common JS string operations for easy import into WebAssembly and optimizations thereof. This allows creating and manipulating JS strings from WebAssembly without native support within WebAssembly while still allowing for a similar performance as native string references. The mechanism works by exposing suitably strict versions of JS string operations in the WebAssembly JS API. These can be imported by modules using externref as a generic data type for storing the strings. The engine can identify that these imports can be represented by native graph operators without the need for calling into JS. This leads to a comparable peak performance as native string operations while allowing quick interoperability with JS since no copying at the boundary is required when calling into arbitrary JS functions that consume strings.