List<Element> getContentChildren([String selector])

Returns a list of element children distributed to this element's <content>.

If this element contans more than one <content> in its local DOM, an optional selector may be passed to choose the desired content. This method differs from getContentChildNodes in that only elements are returned.

Source

List<Element> getContentChildren([String selector]) =>
    jsElement.callMethod('getContentChildren', [selector]);