> You don’t need parent You do need parent, check this: https://developer.mozilla.org/en-US/docs/Web/API/Node/parentNode https://developer.mozilla.org/en-US/do

> You don’t need parent You do need parent, check this: https://developer.mozilla.org/en-US/docs/Web/API/Node/parentNode https://developer.mozilla.org/en-US/docs/Web/API/Node/parent... > You want sibling nodes otherwise you will have to traverse back to the root node sometimes to find a sibling. The only need for this is in Node.nextSibling implementation: https://developer.mozilla.org/en-US/docs/Web/API/Node/nextSibling https://developer.mozilla.org/en-US/docs/Web/API/Node/nextSi... Where vector<>::find is pretty sufficient. But in reality (at least in my Sciter) node stores its index in parent's m_children so it is O(1) operation.