function nodesOverlap (nodeA, nodeB) {
    // test if nodeA top partially overlaps nodeB
    if (nodeA.y0 > nodeB.y0 && nodeA.y0 < nodeB.y1) {
      return true
    } else if (nodeA.y1 > nodeB.y0 && nodeA.y1 < nodeB.y1) {
      // test if nodeA bottom partially overlaps nodeB
      return true
    } else if (nodeA.y0 < nodeB.y0 && nodeA.y1 > nodeB.y1) {
      // test if nodeA covers nodeB
      return true
    } else {
      return false
    }
  }
function nodesOverlap (nodeA, nodeB) {
    
    if (nodeA.y0 > nodeB.y0 && nodeA.y0 < nodeB.y1) {
      return true
    } else if (nodeA.y1 > nodeB.y0 && nodeA.y1 < nodeB.y1) {
      
      return true
    } else if (nodeA.y0 < nodeB.y0 && nodeA.y1 > nodeB.y1) {
      
      return true
    } else {
      return false
    }
  }
function nodesOverlap ( nodeA , nodeB ) { // test if nodeA top partially overlaps nodeB if ( nodeA . y0 > nodeB . y0 && nodeA . y0 < nodeB . y1 ) { return true } else if ( nodeA . y1 > nodeB . y0 && nodeA . y1 < nodeB . y1 ) { // test if nodeA bottom partially overlaps nodeB return true } else if ( nodeA . y0 < nodeB . y0 && nodeA . y1 > nodeB . y1 ) { // test if nodeA covers nodeB return true } else { return false } }
check if two nodes overlap
check if two nodes overlap