JavaScript Array unshift() | Method

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Using the JavaScript unshift() method you can add one or more elements to the beginning of a given array. This method overwrites the original array and returns the new length of the array.

array.unshift(item1, item2, ..., itemX)

JavaScript array unshift

Simple example code.

<!DOCTYPE html>
<html>
<body>
  <script>
    const array1 = [1, 2, 3];

    console.log(array1.unshift(4, 5));
    console.log(array1.unshift(6));

    console.log(array1);
  </script>
</body>
</html> 

Output:

JavaScript Array unshift method

More examples

var languages = ["JavaScript", "Python", "Java", "Lua"];

var count = languages.unshift("C++");
console.log(languages); // [ 'C++', 'JavaScript', 'Python', 'Java', 'Lua' ]
console.log(count); // 5

Do comment if you have any doubts or suggestions on this Array topic.

Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.

OS: Windows 10

Code: HTML 5 Version

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