pruebas/calculateRestrictDays.html at master · Ferchax/pruebas · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Document</title>
</head>
<body>
  <input type="text" name="initDate" id="initDate" value="12/07/2018">
  <input type="text" name="endDate" id="endDate" value="31/07/2018">
  <button id="btnCalculate">calcular</button>
  <div id="output"></div>
  <script>
    function calculateRestrictDays(initDate, endDate){

      //console.log(initDate);
      //console.log(endDate);

      const arrInitDate = initDate.split('/');
      const arrEndDate = endDate.split('/');

      const initDay = Number.parseInt(arrInitDate[0], 10);
      //console.log("initDay", initDay);
      const endDay = Number.parseInt(arrEndDate[0], 10);
      //console.log("endDay", endDay);
      const month = arrInitDate[1];
      //console.log("month", month);
      const year = arrInitDate[2];
      //console.log("year", year);
      const addDays = endDay - initDay;
      //console.log("addDays", addDays);
      const lengthAddDays = initDay + addDays;
      //console.log("lengthAddDays", lengthAddDays);

      const dates = [];

      for(let i=initDay;i<=lengthAddDays;i++) {
        let day = i;
        if(day<10) day = `0${i}`;
        dates.push(`"${year}-${month}-${day}"`);
      }

      //console.log(dates);

      const output = document.getElementById("output");
      output.innerHTML = `[${dates.join(", ")}]`;
    }

    document.getElementById("btnCalculate")
    .addEventListener("click", function(){
      calculateRestrictDays(
        document.getElementById("initDate").value,
        document.getElementById("endDate").value
      )}, false);
  </script>
</body>
</html>