In Blink setHref is automatically bound to C++ code [1]. I think it's fair to say that anything goes. [1]: https://source.chromium.org/chromium/chromium/src/+/

In Blink setHref is automatically bound to C++ code [1]. I think it's fair to say that anything goes. [1]: https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/renderer/core/frame/location.cc;bpv=1;bpt=1;l=145?gsn=setHref&gs=KYTHE%3A%2F%2Fkythe%3A%2F%2Fchromium.googlesource.com%2Fcodesearch%2Fchromium%2Fsrc%2F%2Fmain%3Flang%3Dc%252B%252B%3Fpath%3Dthird_party%2Fblink%2Frenderer%2Fcore%2Fframe%2Flocation.cc%235dpUtEs_gNfN7GTs_HuW1d8L5ztFqGh3JuuAWoNXHCU https://source.chromium.org/chromium/chromium/src/+/main:thi...