I have the following bit of code to select and remove a d3.js node.

 if (d.children) {

        for (var child of d.children) {

            if (child == node) {

                d.children = _.without(d.children, child);

                update(root);

                break;

            }

        }

    }

This works fine in Chrome and Edge, but fails in IE-11 with missing ;. It appears to be a problem with using 'of' to loop. Has anyone else run across this issue with IE before and if so how did you resolve it?