Problem "Ionic browser"

Hello

With command “Ionic browser

image

thanks for your help

does this command even exists? What do you want to achieve? If you want to run your app in browser, use ionic serve

I know “Ionic serve” but if I want to test “window.requestFileSystem (window.PERSISTENT, 0, fsReceived, errorHandler)” with “Ionic serve” it’s not working. With “ionic browser” it works.