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<html lang="en">
<head>
  <meta charset="utf-8">
  <title>cloneDeep vs clone</title>
</head>
<body>
  <h1>cloneDeep vs clone</h1>
  <pre id="out"></pre>
  <script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script>
  <script>
    var source = { b: { c: 1 } };
    var shallow = _.clone(source);
    var deep = _.cloneDeep(source);
    document.getElementById("out").textContent =
      "shallow.b === source.b: " + (shallow.b === source.b) +
      "\ndeep.b === source.b: " + (deep.b === source.b);
  </script>
</body>
</html>

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Lodash _.cloneDeep vs _.clone (Try It)