Version 8.x is not compatible with tsconfig --skipLibCheck false

[reda-alaoui]

My project is a webapp using Ketting in the browser context. Therefore I have no dependency on any related nodejs component.
My tsconfig had always --skipLibCheck false.

When moving from version 7.5.1 to 8.0.1, I get the following error:

Error: node_modules/ketting/dist/resource.d.ts:5:30 - error TS7016: Could not find a declaration file for module 'events'. '/home/node/app/ui/client/project/node_modules/events/events.js' implicitly has an 'any' type.
2026-02-15T14:12:01.424099444Z   Try `npm i --save-dev @types/events` if it exists or add a new declaration (.d.ts) file containing `declare module 'events';`
2026-02-15T14:12:01.424143747Z 
2026-02-15T14:12:01.424184918Z 5 import { EventEmitter } from 'events';
2026-02-15T14:12:01.424224846Z                                ~~~~~~~~
2026-02-15T14:12:01.424244838Z 
2026-02-15T14:12:01.424268067Z 
2026-02-15T14:12:01.424306801Z Error: node_modules/ketting/dist/state/base-state.d.ts:103:22 - error TS2591: Cannot find name 'Buffer'. Do you need to install type definitions for node? Try `npm i --save-dev @types/node` and then add 'node' to the types field in your tsconfig.
2026-02-15T14:12:01.424339982Z 
2026-02-15T14:12:01.424369699Z 103     serializeBody(): Buffer | Blob | string;
2026-02-15T14:12:01.424382367Z                          ~~~~~~
2026-02-15T14:12:01.424424027Z 
2026-02-15T14:12:01.424449190Z 
2026-02-15T14:12:01.424468106Z Error: node_modules/ketting/dist/state/interface.d.ts:66:22 - error TS2591: Cannot find name 'Buffer'. Do you need to install type definitions for node? Try `npm i --save-dev @types/node` and then add 'node' to the types field in your tsconfig.
2026-02-15T14:12:01.424485845Z 
2026-02-15T14:12:01.424514938Z 66     serializeBody(): Buffer | Blob | string;
2026-02-15T14:12:01.424535232Z                         ~~~~~~
2026-02-15T14:12:01.424564557Z 
2026-02-15T14:12:01.424591993Z 
2026-02-15T14:12:01.424616496Z Error: node_modules/ketting/dist/types.d.ts:15:36 - error TS2591: Cannot find name 'Buffer'. Do you need to install type definitions for node? Try `npm i --save-dev @types/node` and then add 'node' to the types field in your tsconfig.
2026-02-15T14:12:01.424659509Z 
2026-02-15T14:12:01.424697325Z 15     serializeBody?: () => string | Buffer | Blob;
2026-02-15T14:12:01.424722290Z                                       ~~~~~~

The only solution I found to get rid of this issue is to use --skipLibCheck true.

I think this difference of behavior comes from the fact the webpack output was removed between 7.x and 8.x.

Despite the workaround, it doesn't feel right to enable skipLibCheck.

[reda-alaoui]

Ok skipLibCheck was a bad idea :D ⬇️

global-error-handler.ts:22 ERROR ReferenceError: Buffer is not defined
    at needsJsonStringify (fetch-body-helper.js:8:26)
    at optionsToRequestInit (resource.js:324:55)
    at resource.js:154:50
    at [Generator.next](http://generator.next/) (<anonymous>)
    at asyncGeneratorStep (asyncToGenerator.js:3:1)
    at _next (asyncToGenerator.js:17:1)
    at asyncToGenerator.js:22:1
    at new ZoneAwarePromise (zone.js:2702:25)
    at asyncToGenerator.js:14:1
    at Resource.postFollow (resource.js:166:10)

[reda-alaoui]

The 2nd fix attempt didn't work 🐰

node_modules/ketting/dist/state/state-serialized-body.d.ts:1:35 - error TS2591: Cannot find name 'Buffer'. Do you need to install type definitions for node? Try `npm i --save-dev @types/node` and then add 'node' to the types field in your tsconfig.

1 export type StateSerializedBody = Buffer | Blob | string;
                                    ~~~~~~
node_modules/ketting/dist/types.d.ts:15:36 - error TS2591: Cannot find name 'Buffer'. Do you need to install type definitions for node? Try `npm i --save-dev @types/node` and then add 'node' to the types field in your tsconfig.

15     serializeBody?: () => string | Buffer | Blob;
                                      ~~~~~~
node_modules/ketting/dist/resource.d.ts:5:30 - error TS7016: Could not find a declaration file for module '#events'. '/home/rhousni/projects/taiga-ui-ketting/node_modules/events/events.js' implicitly has an 'any' type.
  Try `npm i --save-dev @types/events` if it exists or add a new declaration (.d.ts) file containing `declare module '#events';`

5 import { EventEmitter } from '#events';