javascript-dasar/47-Function_Closure.html at main · azamiset/javascript-dasar · GitHub

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<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Function Closure</title>
</head>

<body>
  <script>
    // Closure adalah kemampuan untuk mengeluarkan variabel dan function di local / nested scope agar dapat diakses di global scope

    function createAdder(value) {
      // local scope
      const owner = "Eko";

      function add(param) {
        // nested scope
        document.writeln(`<p>${owner}</p>`)
        return value + param;
      }
      return add;
    }
    const addTwo = createAdder(2);
    document.writeln(addTwo(10));
    document.writeln(addTwo(6));

    /*
    seolah olah kita sedang membuat funstion seperti ini:
    const owner = "Eko";
    function addTwo(param) {
      dodocument.writeln(`<p>${owner}</p>`);
      return 2 + param;
    }
    */

  </script>
</body>

</html>