Currently, I am looking to activate the noImplicitAny flag in my compiler.
My main issue lies with utilizing lodash/fp as there are no typings available at this moment.
Due to this, the compiler is generating errors due to the absence of a definition file for lodash/fp.
Is there a method to selectively permit implicit any solely for external JavaScript files? Or perhaps create a whitelist for a specific subdirectory such as node_modules?
To easily add type declarations to your TypeScript project without modifying existing JavaScript files, you can create a declaration file with a ".d.ts" extension, such as ambient-modules.d.ts
Simply include the following line in this new file:
declare module '*';
That's it!
By doing this, you can leverage the benefits of the noImplicitAny flag while keeping other JavaScript files unchanged.
If you need more information, check out this resource
To work around this issue, I have a strategy where I create a separate file to list out the modules that do not have typings available. For instance, I would make a file called modules.ts and then specify the module I want to use by declaring it like this: declare module 'name-of-module'. Then, in any file where I need to utilize that untyped module, I can import my modules.ts and access the module using the import * as syntax. This approach converts the implicit any to explicit any, so even though there are no typings for these modules, you can still integrate them into your code.
Ensure your tsconfig.json file includes the following configurations:
{
"compilerOptions": {
"target": "es5",
"module": "commonjs",
"noResolve": true,
"sourceMap": true,
"noImplicitAny": true,
"removeComments": true,
"experimentalDecorators": true
},
"exclude": [
"node_modules"
]
}
By setting this up, you can prevent the unnecessary compilation of the node_modules folder as it likely already contains JavaScript files.
If you do not specify "files" and "include", the compiler will automatically include all TypeScript (.ts, .d.ts, and .tsx) files in the directory and subdirectories except for those listed in the "exclude" property.
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