The Javascript handler has() method hides the specified property.
Syntax:
has: function(target, property)
Parameters:
target: It represents the target object.
property: It represents the property to be hidden.
Return:
Boolean.
Example:
<!DOCTYPE html> <html> <body> <script> var handler={x:10} var display = new Proxy(handler, { has: function(a,b) { document.writeln(b); return false; } }); document.writeln('Value:' in display); </script> </body> </html>