JavaScript array index 'undefined' in Internet Explorer

Question

The following script prints undefined to the console for each character in the string, but works correctly in Chrome.

<script>
function main()
{
    var x = "hello world";
    for ( var i = 0; i < x.length; ++i ) {
        console.log( x[i] );
    }
}
main();
</script>

Do I have to do something to the array in order to get this to work properly in all browsers?

Answer 1

The [] is supported in some browsers but not all:

Array-like character access (the second way above) is not part of ECMAScript 3. It is a JavaScript and ECMAScript 5 feature.

For maximum compatibility, use String.charAt() instead:

<script>
function main()
{
    var x = "hello world";
    for ( var i = 0; i < x.length; ++i ) {
        console.log( x.charAt(i) );
    }
}
main();
</script>