Javascript – Spread Operator

OVERVIEW

The Spread operator is a little-known operator which allows you to join arrays together. This might sound similar to the join() function but the difference is that the join() function returns the array as a string, whereas the spread operator returns it as an array.

The spread operator is represented by three dots …

The sample code below shows it in action

SAMPLE CODE

<html>
	<head><title>Spread Operator</title></head>

	<script>
	 let arr1 = [1,2,3];
	 let arr2 = [4.5,6.09,10.001];
	 var arr3 = ["one", "two", "three"];

	 let arr4 = [...arr1, ...arr2, ...arr3];
	 document.write(arr4);

	</script>
	<body>
	</body>
</html>

The output is shown below

1,2,3,4.5,6.09,10.001,one,two,three 

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