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  <title>Lodash wrapper .next() - lazy filter</title>



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  <h1>Lazy filter with .next()</h1>



  <pre id="out"></pre>



  <script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script>



  <script>



    (function () {



      var wrapped = _([1, 2, 3, 4]).filter(function (n) {

        return n % 2 === 0;

      });



      var evens = [];

      var result;



      while (true) {

        result = wrapped.next();

        if (result.done) break;

        evens.push(result.value);

      }



      document.getElementById("out").textContent =

        "evens: " + JSON.stringify(evens);



    })();



  </script>



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