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<head>
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  <title>Array push() — spread</title>
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<body>
  <h1>push() — spread merge</h1>
  <pre id="out"></pre>
  <script>
    (function () {
      var fruits = ["apple", "orange"];
      var vegetables = ["carrot", "broccoli"];
      fruits.push.apply(fruits, vegetables);
      document.getElementById("out").textContent = JSON.stringify(fruits);
    })();
  </script>
</body>
</html>

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JavaScript Array push() — merge spread (Try It)