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  <title>Lodash isRegExp — literal &amp; ctor</title>
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  <h1>_.isRegExp — literal &amp; new RegExp()</h1>
  <pre id="out"></pre>
  <script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script>
  <script>
    (function () {
      document.getElementById("out").textContent =
        "literal: " + _.isRegExp(/pattern/) + "\n" +
        "ctor: " + _.isRegExp(new RegExp("dynamic", "i"));
    })();
  </script>
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Lodash _.isRegExp — literal & constructor (Try It)