The JavaScript map has() method is used to indicate whether the map object contains the specified key element.
Syntax:
mapObj.has(key)
Parameters: key: It represents the specific key that has to be searched.
Return: Returns true if the specified key is present in the map otherwise returns false.
Example:
<!DOCTYPE html> <html> <body> <script> var hello=new Map(); hello.set(1,"GOOD MORNING"); hello.set(2,"GOOD AFTERNOON"); hello.set(3,"GOOD EVENING"); hello.set(4,"GOOD NIGHT"); document.writeln(hello.has(4)); </script> </body> </html>
