JavaScript Map keys() method

JavaScript Map keys() method

by

The JavaScript map keys() method is used to retrieve an object of the Map iterator that contains the keys for each element. Syntax: mapObj.keys() Return: An object of Map iterator. Example: <!DOCTYPE html> <html> <body> <script> var hello=new Map(); hello.set(‘a’,”GOOD MORNING”); hello.set(‘b’,”GOOD AFTERNOON”); hello.set(‘c’,”GOOD EVENING”); hello.set(‘d’,”GOOD NIGHT”); var array= hello.keys(); document.writeln(array.next().value+”<br>”); document.writeln(array.next().value+”<br>”); document.writeln(array.next().value+”<br>”); document.writeln(array.next().value); </script> … Read more