    HighlighterView.prototype.UPDATABLE

If the property is true, the highlighter is updated (highlight() function is called) every time when the related cellView requires an update.

If the property is false, the highlight() method is called only once when the highlighter is added.

The default is true.

    const ChildView = joint.dia.HighlighterView.extend({

        MOUNTABLE: false,
        UPDATABLE: false,

        highlight(_cellView, node) {
            node.classList.add('my-class');
        },

        unhighlight(_cellView, node) {
            node.classList.remove('my-class');
        }

    });