In my use case, we are having to modify the d attribute on a path element inside of an svg tag. This is triggering the MutationObserver. However, the Node object returned by the path element in javascript is not compatible with the expectations in this observer. It still has a className property, but it is not a string type but a SVGAnimatedString. This SVGAnimatedString type does not have an includes property causing these calls to error out.
While it may not be the most elegant fix, adding in a check to see if the includes property is defined fixes this error in my specific use case.
In my use case, we are having to modify the
dattribute on apathelement inside of ansvgtag. This is triggering the MutationObserver. However, theNodeobject returned by thepathelement in javascript is not compatible with the expectations in this observer. It still has aclassNameproperty, but it is not a string type but aSVGAnimatedString. ThisSVGAnimatedStringtype does not have anincludesproperty causing these calls to error out.While it may not be the most elegant fix, adding in a check to see if the includes property is defined fixes this error in my specific use case.