Steven Henty

Developer

© 2019 Steven Henty

Load Gravity Forms via AJAX

by 36 Comments

If you read my post last week, which demonstrates how to display Gravity Forms in WordPress admin pages, it may have got you thinking about all the possibilities it opens up. Perhaps you realised that it’s also possible to load Gravity Forms via WordPress AJAX since that also runs in the admin context.

Of course Gravity Forms has long supported AJAX-enabled forms with the shortcode, but what if you don’t know which form to load until the user selects an option from a list? Or perhaps you only want to load the form only if a certain button is clicked? In this case the form has to be loaded via AJAX not during the first page request.

I’ve put together a rudimentary plugin to demonstrate how to load Gravity Forms via WordPress AJAX. It renders a button along with an empty container ready for the form. When the button is clicked the form is loaded into the container. It supports multiple forms both in admin and in front-end pages.

Here’s an example of how to use it followed by a functioning implementation.



[gravityforms action="button" id=1 text="Load the contact form"]


Notice the sense of tighter integration with Gravity Forms that comes from using the core [gravityforms] shortcode instead of inventing a new one.
// Hook up the AJAX actions
add_action( 'wp_ajax_nopriv_gf_button_get_form', 'gf_button_ajax_get_form' );
add_action( 'wp_ajax_gf_button_get_form', 'gf_button_ajax_get_form' );

// Add the "button" action to the gravityforms shortcode
// e.g. [gravityforms action="button" id=1 text="button text"]
add_filter( 'gform_shortcode_button', 'gf_button_shortcode', 10, 3 );

function gf_button_shortcode( $shortcode_string, $attributes, $content ){
	$a = shortcode_atts( array(
		'id' => 0,
		'text' => 'Show me the form!',
	), $attributes );

	$form_id = absint( $a['id'] );

	if ( $form_id < 1 ) {
		return 'Missing the ID attribute.';
	}

	// Enqueue the scripts and styles
	gravity_form_enqueue_scripts( $form_id, true );

	$ajax_url = admin_url( 'admin-ajax.php' );

	$html = sprintf( '<button id="gf_button_get_form_%d">%s</button>', $form_id, $a['text'] );
	$html .= sprintf( '<div id="gf_button_form_container_%d" style="display:none;"></div>', $form_id );
	$html .= "<script>
				(function (SHFormLoader, $) {
				$('#gf_button_get_form_{$form_id}').click(function(){
					var button = $(this);
					$.get('{$ajax_url}?action=gf_button_get_form&form_id={$form_id}',function(response){
						$('#gf_button_form_container_{$form_id}').html(response).fadeIn();
						button.remove();
						if(window['gformInitDatepicker']) {gformInitDatepicker();}
					});
				});
			}(window.SHFormLoader = window.SHFormLoader || {}, jQuery));
			</script>";
	return $html;
}

function gf_button_ajax_get_form(){
	$form_id = isset( $_GET['form_id'] ) ? absint( $_GET['form_id'] ) : 0;
	// Render an AJAX-enabled form.
	// https://www.gravityhelp.com/documentation/article/embedding-a-form/#function-call
	gravity_form( $form_id,true, false, false, false, true );
	die();
}

A couple of caveats:
1. The single file upload field won't work but the multi-file field will.
2. Remember this is just a demonstration and a proof of concept intended to help point you in the right direction. If you intend to use the code in a production environment please adjust it according to your needs.

The complete plugin is on GitHub if you'd like to follow or fork it.

If you find this useful, or if you implement a different twist on the idea, please do let me know in the comments below.

Comments

  1. Thanks, this was pretty handy!
    I am having an issue, though. If I load the form a second time (via ajax, without reloading the page,) the form action is different, and the form will not send.

    When my page first loads, it uses the gravity_form() function to get my form into the page, and the form action is “/new/#gf_2”
    Sending from this form works.

    Then if I reload the form via ajax (which uses the same gravity_form() call and loads the results into the right element on my page) I get the exact same form, but the action is “/wp-admin/admin-ajax.php#gf_2”
    Sending using this second form does not work (returns 0, actually, in response.)

    Do you have any clues on this?
    Thanks.

    Reply

  2. i’m loving this solution and is coming in very handy. But for some reason, a date field in the returned ajax form doesn’t pop-up the date picker. if i submit and get a required field error, then i can get the date-picker to pop-up.
    i’m wondering if there is anything i can do to get it to work.

    Reply

  3. Hi, this is what I’m looking for I think. I want it to open in a popup window ajax style. I want to use on my pricing tables for the “buy now” button. So they click the buy now button and a popup window opens with a field for them to enter a URL and also one for entering a discount coupon code. How do I implement it into my site like that?

    Reply

    • I modified the script to launch the form in a vex popup:

      $.get('{$ajax_url}?action=gf_button_get_form&form_id={$form_id}',function(response){
      vex.open({
      content: response
      });
      // $('#gf_button_form_container_{$form_id}').html().fadeIn();
      button.remove();
      if(window['gformInitDatepicker']) {gformInitDatepicker();}
      });

      Vex is already present and loaded by the theme. HTH!

      Reply

  6. Hi Steven,

    Great inside. However, we have tried to do the same. On first time load we load in the needed script files with gravity_form_enqueue_scripts, then we load the needed page through WP ajax and print it onto the body, the page includes the form using gravity_form. The form is added fine but when submitting the form, the form doesn’t validate properly and the json response is 0. Any idea what might go wrong?

    Reply

  8. Here’s a mod to prevent admin labels from showing instead of the correct ones and to load the form in a fancybox modal:


    add_action( 'wp_ajax_nopriv_gf_button_get_form', 'gf_button_ajax_get_form' );
    add_action( 'wp_ajax_gf_button_get_form', 'gf_button_ajax_get_form' );

    // Add the "button" action to the gravityforms shortcode
    // e.g. [gravityforms action="button" id=1 text="button text"]
    add_filter( 'gform_shortcode_button', 'gf_button_shortcode', 10, 3 );

    function gf_button_shortcode( $shortcode_string, $attributes, $content ){
    $a = shortcode_atts( array(
    'id' => 0,
    'text' => 'Show me the form!',
    ), $attributes );

    $form_id = absint( $a['id'] );

    if ( $form_id < 1 ) {
    return 'Missing the ID attribute.';
    }
    // Enqueue the scripts and styles
    gravity_form_enqueue_scripts( $form_id, true );

    $ajax_url = admin_url( 'admin-ajax.php' );

    $html = sprintf( '%s', $form_id, $a['text'] );
    $html .= sprintf( '', $form_id );
    $html .= "
    (function (SHFormLoader, $) {
    $('#gf_button_get_form_{$form_id}').click(function(){
    var button = $(this);
    $.get('{$ajax_url}?action=gf_button_get_form&form_id={$form_id}',function(response){
    $.fancybox.open({
    content: response
    });
    if(window['gformInitDatepicker']) {gformInitDatepicker();}

    });
    });
    }(window.SHFormLoader = window.SHFormLoader || {}, jQuery));
    ";
    return $html;
    }
    $form_id = isset( $_GET['form_id'] ) ? absint( $_GET['form_id'] ) : 0;

    add_filter('gform_pre_render_'.$form_id, 'fix_admin_labels');

    function fix_admin_labels($form){
    foreach($form['fields'] as $i=>$field) {
    if(isset($field['adminLabel'])){
    $field['adminLabel'] = $field['label'];
    }
    }
    return $form;
    };

    function gf_button_ajax_get_form(){
    global $form_id;
    gravity_form( $form_id,true, false, false, false, true );
    die();
    }

    Reply

  9. Hi Steven,
    Is there a way to have the button follow the styles set out by the theme? It seems that right now it produces a basic button. Love the plugin btw. Thanks

    Reply

  10. Really helpful code, thank you! One variation I’ve added is to separate the button build into its own function, which can be called by the shortcode filter or echoed into a template. Super helpful for a current project.

    Reply

  11. Thanks for that plugin, it looks just what I needed. I entered the shortcode in the notification text of the form so that the button appears after the notification message. The problem here is that once the button is pressed the notification message keeps being visible and all form styles have inherited the notification message styles! Then when the form gets submited another notification message gets added under the first one! Is there a way for the button to make the form load on top of the notification message thus replacing it and start with a new form but obviously without refreshing the page?

    Reply

  12. Hi Steve,

    Is it possible to get this to also populate a drop down set to dynamically populate.

    Here’s a crude example of what i’m trying to attempt, http://bit.ly/1qAStZC.

    I’d like to already have the form loaded on a page and have someone click a link to update a dropdown on the form, they would then click another link to update another dropdown on the form.

    The way I have it set up the user clicks the link it takes them to an anchor of the page where the form is with their input chosen, however if they go back to the top and choose another link when they return to the anchor with the form the new option is selected but the old one has returned to its’ default value.

    Reply

  13. Hi,
    Thank so much for the snippet, it works!
    I am however trying to add links to buttons in my pricing table.
    Is there a way to retrieve the link only, so i can add it to my pricing table’c button url.

    Reply

  14. Hi Steve,

    Thanks for distributing your plugin.

    Do you know how to send a drop down value to another page with ajax in gravity forms? so, via that value we can decide which gravity view to load. I tried tweaking gravityforms.php, but couldn’t make it. Also, couldn’t specify an action for the form. Please advise which file should be tweaked. Thanks

    Reply

  15. Steven,

    I’ve been searching for solution on how to load my Gravity forms everytime a user changes the option in my `WooCommerce` variable product `dropdown`?

    The Gravity form will depend on the variation id of `WooCommerce`.
    I am able to pull and display the variation Id in my product page. The problem is I don’t know how to load the form via AJAX.

    //This is my JS

    jQuery(document).ready(function($){
    $( document ).on( “found_variation.first”, function ( e, v ) {

    //console.log(“inside JS “+ v.variation_id );
    var varid = v.variation_id;
    var ajaxurl = object.ajaxurl;
    var data = {
    action: ‘my_action’,
    var_id : varid,
    };
    $.post(ajaxurl, data, function(response) {

    $((‘div.woocommerce-variation-add-to-cart’)).html(response);
    class=”selected-variation-id”>’+response+”);

    });

    } );
    });

    This is my functions.php

    wp_register_script( ‘my-fffjquery-script’, get_template_directory_uri() . ‘/js/my-fffjquery-script.js’, array( ‘jquery’ ), ‘1.0.0’, true );

    wp_localize_script( ‘my-fffjquery-script’, ‘object’, array( ‘ajaxurl’ => admin_url( ‘admin-ajax.php’ ) ) );
    wp_enqueue_script( ‘my-fffjquery-script’);

    add_action( ‘wp_ajax_my_action’, ‘my_action_callback’ );
    add_action( ‘wp_ajax_nopriv_my_action’, ‘my_action_callback’ );

    function my_action_callback(){
    $passedvariationid = $_POST[‘var_id’];
    global $form_id;
    echo $passedvariationid; // will be ‘response’ in ajax
    $form_id = ‘9’;
    gravity_form( $form_id,true, false, false, false, true );

    die();

    Reply

  17. Hi Steven

    Awesome work!

    Have implementet the Popup solution you provided above, and everything works. But what if you have two buttons on the same page, to the same form?

    I have moved the ID value to a class value and wrapped it in a jQuery.each(). But when I click the button, two popups appear (with two instances of the button on the page)

    Here’s the code:

    function gf_button_shortcode($shortcode_string, $attributes, $content)
    {
    [… code left out intentionally… ]

    $html = sprintf(‘%s’, $form_id, $a[‘button_class’], $a[‘text’]);
    $html .= sprintf(”, $form_id);
    $html .= ”
    (function (SHFormLoader, $) {
    $(‘.gf_button_get_form_{$form_id}’).each(function(index){
    $(this).click(function(){
    $.get(‘{$ajax_url}?action=gf_button_get_form&index=’+index+’&form_id={$form_id}’,function(response){
    console.log(response);
    lity(response);
    if(window[‘gformInitDatepicker’]) {gformInitDatepicker();}
    });
    });
    });
    }(window.SHFormLoader = window.SHFormLoader || {}, jQuery));
    “;
    return $html;
    }

    Cheers!

    Jeppe R.

    Reply

    • You also need the following (from GF_Field_CAPTCHA::ensure_recaptcha_js() )


      jQuery( document ).bind( 'gform_post_render', function() {
      var gfRecaptchaPoller = setInterval( function() {
      if( ! window.grecaptcha || ! window.grecaptcha.render ) {
      return;
      }
      renderRecaptcha();
      clearInterval( gfRecaptchaPoller );
      }, 100 );
      } );

      Reply

  20. Hi there. I’m looking for a way to load my gravity forms via ajax to prevent autopopulated fields from beeing cached.

    How can I use your plugin to load every form via ajax on page load and not only when somebody clicks the button?

    Reply

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