[Home](./index.md) > [@keymanapp/kmc-ldml](./kmc-ldml.md) > [LdmlKeyboardCompiler](./kmc-ldml.ldmlkeyboardcompiler.md) > [init](./kmc-ldml.ldmlkeyboardcompiler.init.md) ## LdmlKeyboardCompiler.init() method Initialize the compiler, including loading the WASM host for uset parsing. Copies options. **Signature:** ```typescript init(callbacks: CompilerCallbacks, options: LdmlCompilerOptions): Promise; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | callbacks | CompilerCallbacks | Callbacks for external interfaces, including message reporting and file io | | options | [LdmlCompilerOptions](./kmc-ldml.ldmlcompileroptions.md) | Compiler options | **Returns:** Promise<boolean> false if initialization fails