[Bug]: APIRequestContext query params displays undefined

[vethman]

Version

1.50.1

Steps to reproduce

1. Clone my repo at: https://github.com/vethman/playwright-undefined-query-params.git
2. npm i
3. run tests
4. 1 test fails

Expected behavior

When passing a undefined value as param to the apirequest I expect to not see this param in the URL.

Actual behavior

I see the key with value undefined as query param in the URL:

Expected: "https://example.com/api/getText?isbn=123456"
Received: "https://example.com/api/getText?isbn=123456&page=undefined"

Additional context

I don't like to have al the logic in my test layer. I have an actual architecture where I have multiple layers and finally I am able to pass the params with or without the optional values. So it is possible an optional value is made undefined.

Environment

System:
    OS: Windows 11 10.0.22631
    CPU: (12) x64 12th Gen Intel(R) Core(TM) i7-1265U
    Memory: 16.37 GB / 31.83 GB
  Binaries:
    Node: 22.5.1 - C:\Program Files\nodejs\node.EXE
    npm: 10.8.2 - C:\Program Files\nodejs\npm.CMD
  IDEs:
    VSCode: 1.96.4 - C:\Users\ROB8094\AppData\Local\Programs\Microsoft VS Code\bin\code.CMD
  npmPackages:
    @playwright/test: ^1.50.1 => 1.50.1