Web Worker postMessage


structuredClone 이용함





[JS structuredClone()](https://texonom.com/js-structuredclone-e5c933bb0ab0408ebc581e1fed2d5c33) 
> [The structured clone algorithm - Web APIs | MDN](https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Structured_clone_algorithm)





