Want to show an alert or dialog box when user selects a row from a table in VBCS

Summary

Want to show an alert or dialog box when user selects a row from a table in VBCS

Content

I have a table which displays multiple records. On selecting one row, I want to show an alert saying, the selected record is already active, close the alert to navigate to home page. We tried using notification component, but it does not restrict for single selection. Even though, we are not closing the notification alert, it is allowing to click on other records as well. We want main focus to shift to closing the notification, we want everything else to disable unless and until user closes the notification alert.