function hasArrayNature()

in packages/fbjs/src/core/createArrayFromMixed.js [85:107]

• 14 lines of code
• 9 McCabe index (conditional complexity)

function hasArrayNature(obj) {
  return (
    // not null/false
    !!obj &&
    // arrays are objects, NodeLists are functions in Safari
    (typeof obj == 'object' || typeof obj == 'function') &&
    // quacks like an array
    ('length' in obj) &&
    // not window
    !('setInterval' in obj) &&
    // no DOM node should be considered an array-like
    // a 'select' element has 'length' and 'item' properties on IE8
    (typeof obj.nodeType != 'number') &&
    (
      // a real array
      Array.isArray(obj) ||
      // arguments
      ('callee' in obj) ||
      // HTMLCollection/NodeList
      ('item' in obj)
    )
  );
}