Hi All, i am trying to write one condition to open Data Import wizard if opportunity is not closed lost. also to throw a message if opportunity is closed lost, but its not working. can you please have a look.

{! IF(Opportunity.StageName != "Closed Lost", "/lightning/setup/DataManagementDataImporter/home", "XXXXXXXXXXXXXX) }  

also i am trying   below one

if({!Opportunity.StageName=="Closed Lost"}){
    alert("Opportunity is Closed Lost, Learner Can not be uploaded");
}
else{
    window.top.location.href =
        "/lightning/setup/DataManagementDataImporter/home";
}

its not working .