Upon having a look at the URL of my react app I saw this very peculiar ending.

http://localhost:3001/?firstName=&gender=female#

Would anyone have an idea of what that is?

CodePudding user response：

It's URL search params, window.location.search ,read that https://developer.mozilla.org/en-US/docs/Web/API/Location/search

CodePudding user response：

Your React application probably contains a HTMLFormElement.

By default, when submitting the form sends the form data to the target. When this attribute is not set, it will send the form data to the current page. Which is http://localhost:3000 in your case.