Developers should avoid creating links or other controls opening new windows without either indicating that fact to users or allowing them to control the focus change. Exceptions are made if the new window comes in the form of a dialog, one that is either predictable by its context (such as a "Print this page" link that triggers the browser's Print dialog), or is implemented in an accessible manner (such as a "Delete" image link that triggers a simple JavaScript alert with an "Are you sure you want to delete this?" prompt).
Tool: https://www.webaccessibility.com/results/?url=http%3A%2F%2Fncov-dashboard.herokuapp.com%2F
Developers should avoid creating links or other controls opening new windows without either indicating that fact to users or allowing them to control the focus change. Exceptions are made if the new window comes in the form of a dialog, one that is either predictable by its context (such as a "Print this page" link that triggers the browser's Print dialog), or is implemented in an accessible manner (such as a "Delete" image link that triggers a simple JavaScript alert with an "Are you sure you want to delete this?" prompt).