parseInt can also operate on numbers.

[endel]

Not sure if this has been reported already. I've searched in the closed issues and pull requests and couldn't find anything related.

parseInt(3.5) is a valid call on JavaScript and has a reasonable return value.

Example:

var rounded = parseInt(3.5);
console.log(rounded);

Expected behaviour:

Output 3 in the console.

Actual behaviour:

Argument of type 'number' is not assignable to parameter of type 'string'.

You can see there's also some examples that provides numbers to parseInt on Mozilla's documentation: https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/parseInt#Examples

[msftclas]

This seems like a small (but important) contribution, so no Contribution License Agreement is required at this point. We will now review your pull request.
Thanks,
Microsoft Pull Request Bot

[sandersn]

Makes sense to me. @rbuckton what is your opinion?

[RyanCavanaugh]

Absolutely not! Don't use parseInt as a poor man's Math.floor!

parseInt(8e20)
> 800000000000000000000
parseInt(8e21)
> 8
parseInt(2e-7)
> 2
parseInt(2e-6)
> 0

[rbuckton]

I concur with @RyanCavanaugh, the MDN docs are promoting bad behavior in that example. Use Math.floor, Math.round, or n | 0 if you want to get an integer from a double.

[RyanCavanaugh]

I've posted an edit to the MDN page

[endel]

Thanks for the clarification and feedback, guys. I really appreciate that.