Broser Storage jQuery

browser-storage.js

    /* functions to create a persistent form */
    function browser_supports_storage() {
        return ( typeof(Storage) !== "undefined" ) ? true : false;
    }

    function local_data_exists() {
        return ( localStorage.getItem('data') ) ? true : false;
    }

    function cookie_is_used_for_persistence() {
        return ( Cookies.get('hpw_search') ) ? true : false;
    }

    function save_form_to_storage() {
        calc_slider_positions();
        var data = JSON.stringify($('form#hpw_search').serializeJSON({checkboxUncheckedValue: "no"}));

        if ( browser_supports_storage() ) {
            localStorage['data'] = data;
        }
        /* always use cookie to access data in PHP */
        Cookies.set('hpw_search', data);
    }

    function restore_form_from_storage() {
        var saved_data = "";

        if ( browser_supports_storage() && local_data_exists() ) {
            saved_data = JSON.parse(localStorage.getItem('data'));
        } else if ( cookie_is_used_for_persistence() ) {
            /* restore field values */
            saved_data = Cookies.getJSON('hpw_search');
        }

        if (saved_data) {
            restore_form_field_values( saved_data );
            /* restore slider width and handle positions */
            restore_slider_positions();
            refresh_sliders();
        }
    }

    function delete_form_from_storage() {
        if ( browser_supports_storage() && local_data_exists() ) {
            localStorage.removeItem('data');
        }
        if ( cookie_is_used_for_persistence() ){
            Cookies.remove('hpw_search');
        }
    }

    function restore_form_field_values( saved_data ) {
        if( ! ( saved_data ) ) {
            return;
        }

        var field_type = '';
        $.each(saved_data, function(key, val) {
            field_type = (key.search('select') !== -1 ) ? 'select' : $('input[name="' + key + '"]').attr('type');

            switch(field_type) {
                case 'checkbox' :
                    if (val === 'yes') {
                        $('input[name="' + key + '"]').prop('checked', true);
                        // $('input[name="' + key + '"]').trigger('click');
                        reset_inputs($('input[name="' + key + '"]'));
                    }
                    break;
                case 'radio':
                    $('input[name="' + key + '"][value="' + val + '"]').prop('checked',true);
                    // $('input[name="' + key + '"]').trigger('click');
                    reset_inputs($('input[name="' + key + '"]'));
                    break;
                case 'select':
                    $('select[name="' + key + '"]').val(val);
                    $('select[name="' + key + '"]').trigger('chosen:updated');
                    break;
                default :
                    $('input[name="' + key + '"]').val(val);
                    if (key === 'plan_count') {
                        $('div#search-results').html('Available Plans: ' + val);
                }
            }
        });
    }