Array unshift()

unshift() adds items to the front of an array and returns the new array length.

 
<!DOCTYPE html>
<html>
<head>
    <title>Example</title>
    <script type="text/javascript">
        var colors = new Array(); //create an array 
        
        var count = colors.unshift("A", "B"); //push two items 
        document.writeln(count); //2 
        count = colors.unshift("C"); //push another item on 
        
        document.writeln(count); //3 
        var item = colors.pop(); //get the first item 
        document.writeln(item); //"B" 
        document.writeln(colors.length); //2 
        
       
    </script>
</head>
<body>
</body>
</html>
  
Click to view the demo
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    Essential Types  

Array:
  1. The Array Type
  2. Array Built-in Methods
  3. Detecting Arrays
  4. Get and set array values
  5. Enumerating the Contents of an Array
  6. Array Length
  7. Array join() method
  8. Array concat()
  9. Array indexOf()
  10. Array lastIndexOf()
  11. Array every()
  12. Array filter() filters array with the given function.
  13. Array map()
  14. Array forEach()
  15. push() and pop():Array Stack Methods
  16. push(), shift():Array Queue Methods
  17. Array reduce()
  18. Array reduceRight()
  19. reverse():Reordering array
  20. Array slice()
  21. Array some()
  22. Array splice()
  23. Array sort()
  24. toString(), toLocaleString() and valueOf Array
  25. Array unshift()