null is not “null”

This issue is reported already 9 months ago. Remaining:
https://ww.wp.xz.cn/support/topic/js-error-with-fix/

It’s about a type mismatch in js/front.js (and then in js/front.min.js as well):

if ( closeIcon !== 'null' )

needs to be:

if ( closeIcon !== null )

Thanks for fixing it.

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