As the latest stable version of the Ionic framework, V4 has been released which is way more future proof and easily adaptable with new frameworks like react, Vuejs etc by using web components technology. But still, there are some developers who may prefer version 3 of Ionic as routing of ionic was having much more similarities to the native environment in terms of keeking view data or maintain the history of a view intact. We can easily use push & pop methods of NavController in ‘ionic-angular’ package.