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Hi. I was trying to use ktor js client and failed to load anything because of CORS policy.
How can it be handled ?

Cors needs to be handled on the server via cors headers

Here're the docs for ktor server <https://ktor.io/docs/cors.html|https://ktor.io/docs/cors.html>

but I'm not using server. I have only client and run project in Continuous Mode

Screenshot from 2022-04-24 16-58-05.png

Then there's nothing you can do except spinning up your own proxy server that would inject such headers

<https://code4developers.com/cors-anywhere/|https://code4developers.com/cors-anywhere/>
 
<https://www.npmjs.com/package/cors-anywhere|https://www.npmjs.com/package/cors-anywhere>

I'm wondering if it could be configured by passing any param to gradle task

This is just how cors work. Not a ktor specific issue.

You can bypass it locally by disabling cors in the browser (search how), but then your app will still break in production.