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in the previous video we have seen how to make use of safe navigation operator in order to avoid undefined and null values to be displayed on our web page so in this video lets discuss how we can hide some data which is empty for example we have this webpage over here this is a localhost colon 4200 where our angular project is hosted so if you see over here some of the events contain data which is not having any value for example online url so in this event there is no value for online url here so what is the use of displaying that it is not required right so we have to validate in such a case we have a requirement where whatever the data which is not having value should not be displayed on our web page the even data so lets see how we can handle this lets switch to visual studio code so this is event hyphen thumbnail component.ts which is our child component class this is where we are displaying the even data which has to be displayed on our webpage so on this even thumbnail compon