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Typescript Errors #500
Description
Attempting to use levelup with leveldown results in a screen full of type errors.
Installed with:
npm install --save levelup leveldown
and
npm install --save-dev @types/levelup @types/leveldown
When run with node_modules/.bin/tsc you get:
node_modules/@types/levelup/index.d.ts(76,20): error TS2694: Namespace '"node_modules/leveldown/leveldown"' has no exported member 'Constructor'.
node_modules/leveldown/leveldown.d.ts(66,3): error TS7010: 'seek', which lacks return-type annotation, implicitly has an 'any' return type.
node_modules/leveldown/node_modules/abstract-leveldown/index.d.ts(2,3): error TS7010: 'open', which lacks return-type annotation, implicitly has an 'any' return type.
node_modules/leveldown/node_modules/abstract-leveldown/index.d.ts(3,3): error TS7010: 'open', which lacks return-type annotation, implicitly has an 'any' return type.
node_modules/leveldown/node_modules/abstract-leveldown/index.d.ts(5,3): error TS7010: 'close', which lacks return-type annotation, implicitly has an 'any' return type.
node_modules/leveldown/node_modules/abstract-leveldown/index.d.ts(7,3): error TS7010: 'get', which lacks return-type annotation, implicitly has an 'any' return type.
node_modules/leveldown/node_modules/abstract-leveldown/index.d.ts(7,26): error TS7006: Parameter 'err' implicitly has an 'any' type.
node_modules/leveldown/node_modules/abstract-leveldown/index.d.ts(8,3): error TS7010: 'get', which lacks return-type annotation, implicitly has an 'any' return type.
node_modules/leveldown/node_modules/abstract-leveldown/index.d.ts(8,39): error TS7006: Parameter 'err' implicitly has an 'any' type.
node_modules/leveldown/node_modules/abstract-leveldown/index.d.ts(10,3): error TS7010: 'put', which lacks return-type annotation, implicitly has an 'any' return type.
node_modules/leveldown/node_modules/abstract-leveldown/index.d.ts(11,3): error TS7010: 'put', which lacks return-type annotation, implicitly has an 'any' return type.
node_modules/leveldown/node_modules/abstract-leveldown/index.d.ts(13,3): error TS7010: 'del', which lacks return-type annotation, implicitly has an 'any' return type.
node_modules/leveldown/node_modules/abstract-leveldown/index.d.ts(14,3): error TS7010: 'del', which lacks return-type annotation, implicitly has an 'any' return type.
node_modules/leveldown/node_modules/abstract-leveldown/index.d.ts(17,3): error TS7010: 'batch', which lacks return-type annotation, implicitly has an 'any' return type.
node_modules/leveldown/node_modules/abstract-leveldown/index.d.ts(18,3): error TS7010: 'batch', which lacks return-type annotation, implicitly has an 'any' return type.
Activity
vweevers commentedon Oct 4, 2017
We are actively working on improving the typings, they will be included in
levelupitself. Stay tuned!cc @MeirionHughes @zixia
MeirionHughes commentedon Oct 4, 2017
leveldown, memdown, encoding-leveldown come with their own types that are different and breaking to the defiantly typed ones. we're in the process of updating the typings for levelup too.
huan commentedon Oct 4, 2017
@gpresland I believe this issue will be solved after the levelup v2.0 package is published on NPM with the latest typings.
Before that, I suggest you try
npm i levelup@2.0.0-rc2, which is the only version with the right(almost) typings currently.You can have a look at this TypeScript repository which has a workable levelup at:
https://github.com/zixia/flash-store/blob/31a8ab6f3ddd79a5a55b97ed868ad719d7cc5cd4/package.json#L36-L38
earslap commentedon Oct 21, 2017
Any updates on this issue? I believe the v2.0.0 is released on npm, and leveldown has their typings bundled but levelup has no d.ts files. The type declerations under definitelytyped are 6-7 months old so I don't know where I'm supposed to get the latest ones...
huan commentedon Oct 24, 2017
I have a workaround as the following combination:
Then the typing system works.
sqwk commentedon Dec 5, 2017
This hasn't made it into 2.0.1, has it?
vweevers commentedon Dec 5, 2017
Correct. You can follow #499 for progress.
peternoyes commentedon Jan 11, 2018
@zixia What types are using that works with the github version of levelup?
I am trying:
"@types/leveldown": "^1.7.0",
"@types/levelup": "0.0.30",
And still seeing errors
huan commentedon Feb 2, 2018
@peternoyes Please have a look at https://github.com/zixia/flash-store to get it work.
I use
levelupwith typing in that project.vweevers commentedon May 22, 2018
Please see Level/community#16.