After updating our Meta Box plugins to the latest versions (Meta Box v5.1.2 and MB Group v1.3.4) my Meta Box groups are suddenly breaking and throwing the error Uncaught TypeError: Cannot read property 'type' of undefined.
Digging into the code it appears that the group.toggle.updateTitle function in the group.js file is looking for the group title element as a direct descendant (the selector is "> .rwmb-group-title, > .rwmb-input > .rwmb-group-title") but the group title element is nested under the .rwmb-group-title-wrapper element so it is not a direct descendant. The code assumes it finds the group title element successfully, tries to get the options from the data-options attribute, and then references the option's title field which is undefined since it didn't actually find the group title element or data-options attribute.
Below is an excerpt of the code I'm looking at in the group.js file. The $title variable has a length of zero (no elements found) so therefore the options variable is undefined, which causes the conditional statement of if ( 'text' === options.type ) to fail.
Is this a known bug and if so is there a work-around or fix? We haven't customized anything so I don't think this is an issue with just our implementation.
/**
* Update group title.
*
* @param index Group clone index.
* @param element Group element.
*/
group.toggle.updateTitle = function ( index, element ) {
var $group = $( element ),
$title = $group.find( '> .rwmb-group-title, > .rwmb-input > .rwmb-group-title' ),
options = $title.data( 'options' ),
content;
if ( 'text' === options.type ) {
content = options.content.replace( '{#}', index );
}
if ( 'field' === options.type ) {
var fieldId = $title.data( 'options' ).field,
$field = $group.find( ':input[name*="[' + fieldId + ']"]' );
.
