Access to script at 'file:///F:/M/JSPlay.js' from origin 'null' has been blocked by CORS policy: Cross origin requests are only supported for protocol schemes: http, data, chrome, chrome-extension, chrome-untrusted, https.

there is a error about CORS, i use `-s SINGLE_FILE=1` to make the C project ,and only generate the Decoder.js ， and load it in the DecodeWorker.js, then new DecodeWorker() in JSPlay.js , last , in test.html , i load the JSPlay.js , there is a CORS policy .

i have confirm that new webworker in html is ok , and load the Decoder.js in html is also ok ，so my code architecture is html load JSPlay.js , and JSPlay.js new the webworker that load the Decoder.js , why is a CORS policy ?