Having trouble with a 'Could not find a declaration file for module' error while using my JavaScript npm package?

I recently released a JavaScript npm package that is functioning properly. However, when importing it into another application, there always seems to be three dots in front of the name, along with an error message that reads:

Could not find a declaration file for module 'my-npm-package'

I am wondering how I can create a declaration file for it. It's worth mentioning that the package is not written in TypeScript and I have no prior experience working with TypeScript.

Here is a glimpse of my file structure:

index.js
package.json
README.md
javascripttypescriptnpmnpm-publish

Answer №1

If you want to create an `index.d.ts` file, you can utilize the following command:

tsc --declaration --allowJs --emitDeclarationOnly index.js

Remember, if you do not have `typescript` installed on your system, you will need it in order for this command to function properly:

npm install -g typescript

Additionally, you can include a `types` section in your `package.json` file that points to your declarations file.

{
...
"main": "index.js",
"types": "index.d.ts",
...
}

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