https://legacy.forums.gravityhelp.com/topic/edit-form-field-manually-with-javascript Gravity Support Forums Topic: Edit form field manually with javascript en-US Mon, 20 Apr 2026 10:02:05 +0000 http://bbpress.org/?v=1.0.1 q https://legacy.forums.gravityhelp.com/search.php https://legacy.forums.gravityhelp.com/topic/edit-form-field-manually-with-javascript#post-362964 Fri, 05 Jul 2013 06:18:11 +0000 xtrme 362964@https://legacy.forums.gravityhelp.com/ <p>Yeah, I put a try catch around it, I couldn't figure out why the function threw an undefined jquery event which crashes the application. So it's not really solved, but fixed enough :)</p> <p>It threw 3 events in this order:<br /> gform_post_conditional_logic,<br /> change<br /> undefined (crashes jquery) </p> https://legacy.forums.gravityhelp.com/topic/edit-form-field-manually-with-javascript#post-361964 Thu, 04 Jul 2013 16:49:13 +0000 Richard Vav 361964@https://legacy.forums.gravityhelp.com/ <p>It looks like you figured this out. </p> https://legacy.forums.gravityhelp.com/topic/edit-form-field-manually-with-javascript#post-357793 Tue, 02 Jul 2013 11:26:03 +0000 xtrme 357793@https://legacy.forums.gravityhelp.com/ <p>It appears to work. The field gets shown. I only now have to solve an error I get from calling the function inside trigger</p> <p>"Uncaught TypeError: Cannot convert null to object " in jquery.min.js line 5.</p> <p>Thanks for the gf_apply_rules function. </p> https://legacy.forums.gravityhelp.com/topic/edit-form-field-manually-with-javascript#post-357420 Tue, 02 Jul 2013 07:20:02 +0000 Richard Vav 357420@https://legacy.forums.gravityhelp.com/ <p>It's because you are using a hidden field which doesn't get an onChange event added to it, try this instead<br /> <pre><code>.trigger(gf_apply_rules(2, [6,16,17,18,19,20], true));</code></pre> <p>the numbers inside the square brackets are the fields you have set the conditional logic on, I just copied them all but you can reduce it down to just the field or fields you want the conditional logic triggered on </p> https://legacy.forums.gravityhelp.com/topic/edit-form-field-manually-with-javascript#post-357354 Tue, 02 Jul 2013 06:35:54 +0000 xtrme 357354@https://legacy.forums.gravityhelp.com/ <p>It can be viewed at <a href="http://www.thislooksgreat.com/" rel="nofollow">http://www.thislooksgreat.com/</a><br /> After you have uploaded an image the code is run at ~line 368 inline script.<br /> I've removed the trigger() code tho as it appeared to do nothing. If you press F5 after uploading an image the field that is supposed to be shown is visible. So the conditional logic works on a refresh. </p> https://legacy.forums.gravityhelp.com/topic/edit-form-field-manually-with-javascript#post-355352 Mon, 01 Jul 2013 06:24:39 +0000 Richard Vav 355352@https://legacy.forums.gravityhelp.com/ <p>Can you post your full script or a link to see this live. Forgetting triggering the conditional logic for a moment, does your script successfully set the value on the input? </p> https://legacy.forums.gravityhelp.com/topic/edit-form-field-manually-with-javascript#post-355321 Mon, 01 Jul 2013 06:10:45 +0000 xtrme 355321@https://legacy.forums.gravityhelp.com/ <p>Anyone have any idea why the conditional logic event isn't being updated properly when using richardvav's example? </p> https://legacy.forums.gravityhelp.com/topic/edit-form-field-manually-with-javascript#post-352663 Sat, 29 Jun 2013 17:57:55 +0000 xtrme 352663@https://legacy.forums.gravityhelp.com/ <p>Sadly it does not work for me.<br /> <pre><code>$hiddenImageFieldID.val(f_data.path + f_data.file).change();</code></pre> <p>I've also tried using<br /> <pre><code>.trigger(&quot;change&quot;)</code></pre> https://legacy.forums.gravityhelp.com/topic/edit-form-field-manually-with-javascript#post-352622 Sat, 29 Jun 2013 17:16:40 +0000 Richard Vav 352622@https://legacy.forums.gravityhelp.com/ <p>So the Gravity Forms conditional logic works by applying an onChange event to the input but when you use JavaScript to set the value of that input the onChange event isn't triggered but the good news is that you can trigger it by using the jQuery <a href="http://api.jquery.com/change/" rel="nofollow">.change()</a> method without any arguments like so<br /> <pre><code>jQuery(&quot;#input_23_4&quot;).val(&quot;10&quot;).change();</code></pre> https://legacy.forums.gravityhelp.com/topic/edit-form-field-manually-with-javascript#post-352447 Sat, 29 Jun 2013 14:47:48 +0000 xtrme 352447@https://legacy.forums.gravityhelp.com/ <p>Hello, how do I manually through javascript update a fields value so constraints are properly triggered?<br /> I am currently using jQuery("#field_x_y").val("value");</p> <p> My constraint is:<br /> Show if Imagefile_path is not undefined </p> <p> Where Imagefile_path is the hidden element (field_x_y) being set by the javascript and its default value is undefined </p>