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<head>
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  <title>Lodash cloneDeep — compare</title>
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<body>
  <h1>Lodash _.clone vs _.cloneDeep</h1>
  <pre id="out"></pre>
  <script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script>
  <script>
    (function () {
      var source = { cfg: { mode: "light" } };
      var shallow = _.clone(source);
      var deep = _.cloneDeep(source);
      shallow.cfg.mode = "dark";
      deep.cfg.mode = "solarized";
      document.getElementById("out").textContent =
        "sourceModeAfterShallow: " + source.cfg.mode + "\n" +
        "deepMode: " + deep.cfg.mode + "\n" +
        "sourceModeFinal: " + source.cfg.mode;
    })();
  </script>
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Lodash _.cloneDeep — clone vs cloneDeep (Try It)