Encode string to cp852 - iconv-lite

Hi, iam working on App, which uses bluetooth printer to print bills. To get bill printed with correct diacritics, i need to encode it to correct coddepage. This can be done with this iconv-lite library, but iam not able to get it work. Has anyone experience with iconv-lite usage with ionic? Or is there any other way to encode strings in ionic?

I succesfully installed it, imported it in my printerService and try to run ionic serve, i get the following error:

core.js:6014 ERROR Error: Uncaught (in promise): TypeError: Cannot read property 'isEncoding' of undefined
TypeError: Cannot read property 'isEncoding' of undefined
    at Object../node_modules/string_decoder/lib/string_decoder.js (string_decoder.js:29)
    at __webpack_require__ (bootstrap:84)
    at Object../node_modules/iconv-lite/encodings/internal.js (internal.js:49)
    at __webpack_require__ (bootstrap:84)
    at Object../node_modules/iconv-lite/encodings/index.js (index.js:6)
    at __webpack_require__ (bootstrap:84)
    at Object.getCodec (index.js:65)
    at Object.getEncoder (index.js:117)
    at Object.encode (index.js:22)
    at PrintService.testEncode (print.service.ts:26)
    at resolvePromise (zone-evergreen.js:797)
    at zone-evergreen.js:862
    at ZoneDelegate.invokeTask (zone-evergreen.js:391)
    at Object.onInvokeTask (core.js:39680)
    at ZoneDelegate.invokeTask (zone-evergreen.js:390)
    at Zone.runTask (zone-evergreen.js:168)
    at drainMicroTaskQueue (zone-evergreen.js:559)
    at ZoneTask.invokeTask [as invoke] (zone-evergreen.js:469)
    at invokeTask (zone-evergreen.js:1603)
    at HTMLElement.globalZoneAwareCallback (zone-evergreen.js:1629)

When i tried to run it on device, i get this error when i try to enter page, to which is printService injected -

ERROR Error: Uncaught (in promise): Error: Runtime compiler is not loaded
Error: Runtime compiler is not loaded

I get same errors even when i tried to use this ESC POS ionic library - https://github.com/Ans0n-Ti0/EscPosEncoder(with difference, that the error when i run ionic serve says “Unknown Codepage” even if iam entering correct codepage like cp852)

Any ideas how to solve this? iam using ionic 5 and angular 8.