Title: Javascript error
Last modified: August 21, 2016

---

# Javascript error

 *  [sleeplessindc](https://wordpress.org/support/users/sleeplessindc/)
 * (@sleeplessindc)
 * [11 years, 11 months ago](https://wordpress.org/support/topic/javascript-error-47/)
 * A Javascript error in Jetpack won’t allow a gravity form to display because it
   has one question that uses conditional logic. Can this be fixed? Thanks.
 * Firebug identified it as:
 * TypeError: document.body is null
    [http://s0.wp.com/wp-content/js/devicepx-jetpack.js?ver=201424](http://s0.wp.com/wp-content/js/devicepx-jetpack.js?ver=201424)
   line 7 `else if(typeof document.body.style.webkitMarquee==='string'){func=webkit;}`
 * [https://wordpress.org/plugins/jetpack/](https://wordpress.org/plugins/jetpack/)

Viewing 1 replies (of 1 total)

 *  Plugin Author [Brandon Kraft](https://wordpress.org/support/users/kraftbj/)
 * (@kraftbj)
 * Code Wrangler
 * [11 years, 11 months ago](https://wordpress.org/support/topic/javascript-error-47/#post-5000854)
 * Hi,
 * Could you give me a bit more on how to duplicate it? I was able to create a Gravity
   Form with questions trigged with conditional logic without a problem.
 * Have you tried with all other plugins disabled, besides Jetpack and GF? Or if
   it still occurs, while using a default theme?
 * If another plugin or your theme is conflicting with Jetpack, that could cause
   all the following JS to fail to execute, which could cause Gravity Forms to fail
   if it is executing after the conflict.
 * Cheers!

Viewing 1 replies (of 1 total)

The topic ‘Javascript error’ is closed to new replies.

 * ![](https://ps.w.org/jetpack/assets/icon.svg?rev=2819237)
 * [Jetpack - WP Security, Backup, Speed, & Growth](https://wordpress.org/plugins/jetpack/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/jetpack/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/jetpack/)
 * [Active Topics](https://wordpress.org/support/plugin/jetpack/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/jetpack/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/jetpack/reviews/)

## Tags

 * [javascript error](https://wordpress.org/support/topic-tag/javascript-error/)

 * 1 reply
 * 2 participants
 * Last reply from: [Brandon Kraft](https://wordpress.org/support/users/kraftbj/)
 * Last activity: [11 years, 11 months ago](https://wordpress.org/support/topic/javascript-error-47/#post-5000854)
 * Status: not resolved