cf7LocalStorage()

nebula.cf7LocalStorage = function(){
    if ( !jQuery('.wpcf7-form').length || jQuery('.ie, .internet_explorer').length ){
        return false;
    }

    jQuery('.wpcf7-textarea, .wpcf7-text').each(function(){
        var thisLocalStorageVal = localStorage.getItem('cf7_' + jQuery(this).attr('name'));

        //Fill textareas with localstorage data on load
        if ( !jQuery(this).hasClass('do-not-store') && !jQuery(this).hasClass('.wpcf7-captchar') && thisLocalStorageVal && thisLocalStorageVal !== 'undefined' && thisLocalStorageVal !== '' ){
            if ( jQuery(this).val() === '' ){ //Don't overwrite a field that already has text in it!
                jQuery(this).val(thisLocalStorageVal).trigger('keyup');
            }
            jQuery(this).blur();
        } else {
            localStorage.removeItem('cf7_' + jQuery(this).attr('name')); //Remove localstorage if it is undefined or inelligible
        }

        //Update localstorage data
        jQuery(this).on('keyup blur', function(){
            if ( !jQuery(this).hasClass('do-not-store') && !jQuery(this).hasClass('.wpcf7-captchar') ){
                localStorage.setItem('cf7_' + jQuery(this).attr('name'), jQuery(this).val());
            }
        });
    });

    //Update matching form fields on other windows/tabs
    nebula.dom.window.on('storage', function(e){ //This causes an infinite loop in IE11
        jQuery('.wpcf7-textarea, .wpcf7-text').each(function(){
            if ( !jQuery(this).hasClass('do-not-store') && !jQuery(this).hasClass('.wpcf7-captchar') ){
                jQuery(this).val(localStorage.getItem('cf7_' + jQuery(this).attr('name'))).trigger('keyup');
            }
        });
    });

    //Clear localstorage when AJAX submit fails (but submit still succeeds)
    if ( window.location.hash.indexOf('wpcf7') > 0 ){
        if ( jQuery(escape(window.location.hash) + ' .wpcf7-mail-sent-ok').length ){
            jQuery(escape(window.location.hash) + ' .wpcf7-textarea, ' + escape(window.location.hash) + ' .wpcf7-text').each(function(){
                localStorage.removeItem('cf7_' + jQuery(this).attr('name'));
                jQuery(this).val('').trigger('keyup');
            });
        }
    }
};

nebula.cf7LocalStorage = function(){
    //Write your own code here, leave it blank, or return false.
}