Cannot find name 'WeakKey'. version 10.2.2

[diveshdobal]

Bug Report or Feature Request (mark with an x)

- [ ] Regression (a behavior that used to work and stopped working in a new release)
- [ ] Bug report -> please search issues before submitting
- [ ] Feature request
- [ ] Documentation issue or request

After updating from 9.1.5 to 10.2.2 I got error -
Error: node_modules/pdfjs-dist/types/web/text_layer_builder.d.ts:41:32 - error TS2304: Cannot find name 'WeakKey'.

41 textDivProperties: WeakMap<WeakKey, any>;

My angular version 16.2.12

[Adhikaripr]

any update on this, I got the same issue after updating to latest version for security update

[evo-ksalter]

Same here...need to update this package but can't because of this error.

[mibadim]

I have the exact same problem. Any help appreciated.

[SurekhaKarthik]

using below libraries for viewing pdf in my application, but throwing below error.
"ng2-pdf-viewer": "^10.2.1",
"pdfjs-dist": "^4.3.136"

------------------------------------Error------------------------------------------------------------------------------------------------
Error: node_modules/ng2-pdf-viewer/node_modules/pdfjs-dist/types/web/text_layer_builder.d.ts:41:32 - error TS2304: Cannot find name 'WeakKey'.

text_layer_builder.d.ts file : line number 41 :textDivProperties: WeakMap<WeakKey, any>;

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[mgustran]

Same problem here, in my case, using angular 16.2.12 :

• error appears in every version since 10.1.0
• used many ng2-pdf-viewer and pdfjs-dist version combinations does not seem to work either

The only solution that i have found to use it with angular 16 is downgrade to 10.0.0 and remove pdfjs-dist from package.json

[JRobinsIken]

On an angular 16 project, try adding;

"skipLibCheck": true,

to your tsconfig.json file.

This has fixed the issue for me on my angular 16 project.

On my Angular 17 project I found this was not necessary.

I noticed in this commit 15cba0d that the same was added to this project.

[Nicolas-Aguila]

Si bien funciona utilizar

"skipLibCheck": true

no me parece la solucion correcta.

[pkunszt]

Same here.

BUT you do not want to disable the lib checking. pdfjs-dist anyway has a lot of problems, npm complains abut a high severity issue in it for a long time. It would be best to get rid of that dependency altogether in this project.

[guiaume]

Same problem here

[tutiplain]

Same here.

BUT you do not want to disable the lib checking. pdfjs-dist anyway has a lot of problems, npm complains abut a high severity issue in it for a long time. It would be best to get rid of that dependency altogether in this project.

Why is disabling lib checking not a good idea? Can you provide some context? I'm having this same error and have been looking for a solution for a while. I can make it work if I edit the affected line and change "WeakMap" for "any", but I have no idea what this could be breaking. And besides, it seems to not be a very practical solution because I would need to do this edit every time I do an npm install from scratch.

[stalinmazac]

@mgustran provided the most accurate answer. Using the 'skipLibCheck' option didn't seem like the right approach. I found it more effective to downgrade the version, remove pdfjs-dist, and that resolved the issue.

[tutiplain]

Upgrading to Angular 17 solved it for me.