Question

array[i].trim();

is giving an error but only in ie8

it gives an error about ‘unsupported method’.

Maybe .trim was removed in IE 9 ?

Answer 1

String.trim() was added in 1.8.1 and was not implemented in IE8 or lower.

At the start of the code you can use

if(!String.prototype.trim) {
    String.prototype.trim = function () {
        return this.replace(/^\s+|\s+$/g,'');
    };
}

and .trim() will be implemented for any strings.

See here.