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Angular Thermal Printer Library - ng-thermal-print

i have epson tm82 printer connected to the network and an ip assigned as
now after adding all the codes as per the instruction and placing the ip address in the text box in the html page on clicking the connect button there is a cors error as " Access to XMLHttpRequest at ‘’ from origin ‘http://localhost:4200’ has been blocked by CORS policy: Response to preflight request doesn’t pass access control check: No ‘Access-Control-Allow-Origin’ header is present on the requested resource."

can any one help on this ?

(You might get an answer here, but because this forum is focused on npm, you might want to ask your question somewhere that targets experts with your package. I have moved your topic to #community:javascript)