Serialize form data into a usable JS object(jQuery plugin)

formData.js

/**
 * jQuery plugin to convert form fields to a plain JS Object
 * @usage var contactForm = $("form.contact").formData();
 * @returns {'fieldName': 'fieldValue', (...)}
 */
$.fn.formData = function() {
	var data = {},
		keyValues = this.serializeArray();
	$.each(keyValues, function() {
		var field = this.name, val = this.value;
		if (field in data) {
			if (!data[field].push) {
				data[field] = [data[field]]; // promote to Array
			}
			data[field].push(val);
		} else {
			data[field] = val;
		}
	});
	return data;
};