How To Add New Elements At The Beginning Of An Array In JavaScript

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Topic: JavaScript / jQueryPrev|Next

Answer: Use the unshift() Method

You can use the unshift() method to easily add new elements or values at the beginning of an array in JavaScript. This method is a counterpart of the push() method, which adds the elements at the end of an array. However, both method returns the new length of the array.

The following example will show you how to add single or multiple elements at the start of an array.

Example

Try this code » <script> var fruits = ["Apple", "Banana", "Mango"]; // Prepend a single element to fruits array fruits.unshift("Orange"); console.log(fruits); // Prints: ["Orange", "Apple", "Banana", "Mango"] // Prepend multiple elements to fruits array fruits.unshift("Guava", "Papaya"); console.log(fruits); // Prints: ["Guava", "Papaya", "Orange", "Apple", "Banana", "Mango"] // Loop through fruits array and display all the values for(var i = 0; i < fruits.length; i++){ document.write("<p>" + fruits[i] + "</p>"); } </script>

Please check out the tutorial on JavaScript arrays to learn about array manipulations in detail.

Related FAQ

Here are some more FAQ related to this topic:

  • How to loop through an array in JavaScript
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  • How to remove a particular element from an array in JavaScript
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