Untitled

<html>
  <head>
    <title>Run parallel</title>
  </head>
  <body>
    <script>
      (async function() {
        async function f1() {
          return new Promise(res => {
            setTimeout(() => {
              res("1.1");
            }, 1000);
          });
        }

        async function f2() {
          return new Promise(res => {
            setTimeout(() => {
              res("2.1");
            }, 100);
          });
        }

        function runParallel(pArr) {
          // implement here
        }

        for await (const results of runParallel([f1(), f2()])) {
          console.log(results);
        }

        /**
         * should output 2 lines:
         *
         * [undefined, "2.1"] // (after 100 ms)
         * ["1.1", "2.1"] // (after 1000 ms)
         */
      })();
    </script>
  </body>
</html>