JS deep copy Object Array instance analysis_javascript skills

This article analyzes the JS deep copy Object Array with examples. Share it with everyone for your reference, the details are as follows:

function cloneObj(o)
{
  var isArray = o instanceof Array;
  var isObject = o instanceof Object;
  if (!isObject) return o;
  var n = (isArray ? [] : {});
  for (var k in o) n[k] = cloneObj(o[k]);
  return n;
}

Problems encountered

typeof [] results in object
typeof {} results in object

[] instanceof Array results in true
{} instanceof Object results in true
The result of [] instanceof Object is also true

Explain that Array in JS is a subclass of Object.

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I hope this article will be helpful to everyone in JavaScript programming.