Tips for mitigating issues caused by @types packages with patch level updates that bring breaking changes:

Upon discovering a broken Jenkins build of our Angular app, the error message below was encountered:

ERROR in node_modules/angular2-hotkeys/lib/hotkeys.service.d.ts:9:16 - error TS2304: Cannot find name 'MousetrapInstance'.

9     mousetrap: MousetrapInstance;
                 ~~~~~~~~~~~~~~~~~

The issue stems from a breaking change in @types/mousetrap, transitioning from:

export const mousetrap: MousetrapInstance;

to:

export const mousetrap: Mousetrap.MousetrapInstance;

Within the angular2-hotkeys package.json, dependencies are specified as follows:

"dependencies": {
     "mousetrap": "^1.6.0",
     "@types/mousetrap": "^1.6.0"
 },

What is the recommended NPM approach to circumvent this versioning issue?

angulartypescriptpackage.jsontypescript-types

Answer №1

Ensuring the exact package version in use with package.json is not guaranteed, even when specifying a precise match (without the ^) due to potential dependencies needing different versions.

To verify consistency between the version on your local machine and in the CI environment, it is essential to include the package-lock.json file in your commits.

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