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JavaScript - valueOf()

The valueOf() method is the default behavior for an array. It converts an array to a primitive value. JavaScript will automatically convert an array to a string when a primitive value is expected. Because of this, all these examples will produce the same result.

All JavaScript objects have the valueOf() and toString() methods

var fruits = ["Banana", "Orange", "Apple", "Mango"];
document.getElementById("example1").innerHTML = fruits;

var fruits = ["Banana", "Orange", "Apple", "Mango"];
document.getElementById("example2").innerHTML = fruits.valueOf();

var fruits = ["Banana", "Orange", "Apple", "Mango"];
document.getElementById("example3").innerHTML = fruits.toString();