Fix js error
Fix js error

sunlianghua/gitbook,escopecz/documentation,athiruban/gitbook,sunlianghua/gitbook,ryanswanson/gitbook,megumiteam/documentation,haamop/documentation,megumiteam/documentation,mautic/documentation,mautic/documentation,haamop/documentation,npracht/documentation,gencer/gitbook,escopecz/documentation,npracht/documentation,tshoper/gitbook,tshoper/gitbook,athiruban/gitbook,GitbookIO/gitbook,gencer/gitbook,strawluffy/gitbook