Question

I used delete keyword to delete a variable but it doesn’t seem to work….

var txt = "Some text";
alert(txt); //Output - Some text
delete txt;
alert(txt); //SAME OUTPUT - Some text

Answer 1

delete is used to delete properties, not variables. That is, it is used to remove a property from an object.

According to MDN’s explanation of delete, “You can use the delete operator to delete variables declared implicitly but not those declared with the var or the function statement.”

So the behaviour you’ve described is correct.