Question

15

Reversing a string in JavaScript

rated 0 times [ 18] [ 3] / answers: 1 / hits: 98902 / 15 Years ago, fri, october 23, 2009, 12:00:00

I'm trying to reverse an input string

var oneway = document.getElementById('input_field').value();

var backway = oneway.reverse();

but firebug is telling me that oneway.reverse() is not a function. Any ideas?

Thank you

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deannaalysonl

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answered 15 Years ago makiyac · Accepted Answer

reverse() is a method of array instances. It won't directly work on a string. You should first split the characters of the string into an array, reverse the array and then join back into a string:

var backway = oneway.split().reverse().join();

Update

The method above is only safe for regular strings. Please see comment by Mathias Bynens below and also his answer for a safe reverse method.