Compile 3rd TypeScript modules with loose checking mode.

[zheeeng]

TypeScript Version: 2.8.1

Search Terms:
tsconfig + node_modules / compile third module

Tried solutions

set 'skipDefaultLibCheck', 'skipLibCheck', 'moduleResolution' fields in tsconfig.compilerOptions;
set 'exclude', 'include' fields in tsconfig;

Code

Given an example 3rd module viser(viserjs/viser) which are also written in TS. Its package.json defines types field guide tsc to reference 'src/index.ts' under its project root. The lib contains unused locals, unused parameters, implicit any (and we can even assume it contains some totally incorrect type assignments).

And the working project is written in strict mode, its compile configs have severely conflicts with the 3rd module which is written in loose mode. Are there any ways to compile them without error throwing?

Even though we can make tsc output compiled js files ignoring tsc errors, in create-react-app project, build by react-scripts-ts script, any compiling errors will be printed in the terminal and the dev page overlay.

import viser from 'viser'  // a loose checking lib

// strict mode code below

Expected behavior:

The 3rd modules under node_modules are compiled in loose mode, not throw any errors. Our main
project is compiled in strict mode, throw conflicts with tsconfig rules.

Actual behavior:

Compiling throw errors.

[mhegazy]

The 3rd party package is exposing its sources as output. that is wrong. it should be a .d.ts.

Exposing the sources of a package means you want every user to compiler and include that in their output. i.e. distributing code. in this case the errors are correct.

I suggest filing an issue against viser to use a .d.ts instead.