Предположим, что браузер находится на странице http://localhost:8080/companyList

Можно использовать как document.location, так и window.location.

document.URL

> "http://localhost:8080/companyList"

document.location.href

> "http://localhost:8080/companyList"

document.location.origin

> "http://localhost:8080"

document.location.host

> "localhost:8080"

document.location.protocol

> "http:"

document.location.hostname

> "localhost"

document.location.port

> "8080"

document.location.pathname

> "/companyList"

https://developer.mozilla.org/en-US/docs/Web/API/Location