typescript check if empty string code example
Example 1: how to check is null or empty in typescript
if(typeof propertyValue!='undefined' && propertyValue){
}
Example 2: vbscript check if string is empty
Dim strText = ""
'both of these return true
If Len(strText) = 0 Then
'empty
End If
If strText = "" Then
'empty
End If
Example 3: typescript if string is null or empty
function empty(e) {
switch (e) {
case "":
case 0:
case "0":
case null:
case false:
case typeof(e) == "undefined":
return true;
default:
return false;
}
}
empty(null)
empty(0)
empty(7)
empty("")
empty((function() {
return ""
}))