Sample code using card.io PhoneGap plugin

sample_cardio_phonegap.html

<h1>Scan Example</h1>
<p><button id='scanBtn'>Scan now</button></p>
<script type="text/javascript">

  function onDeviceReady() {

    var onCardIOComplete = function(response) {
      console.log("card.io scan result: " + response.card_number);
      // response fields include card_type, redacted_card_number, 
      // card_number, expiry_month, expiry_year, cvv, zip
    };

    var onCardIOCancel = function() {
      console.log("card.io scan cancelled");
    };

    var onCardIOCheck = function (canScan) {
      console.log("card.io canScan? " + canScan);
      var scanBtn = document.getElementById("scanBtn");
      if (!canScan) {
        scanBtn.innerHTML = "Manual entry";
      }
      scanBtn.onclick = function (e) {
        window.plugins.card_io.scan(
          "YOUR_APP_TOKEN_HERE", 
          {}, // set card.io options like collect_expiry, collect_cvv, 
              // collect_zip, shows_first_use_alert, 
              // disable_manual_entry_buttons
          onCardIOComplete, 
          onCardIOCancel);
      }
    };

    window.plugins.card_io.canScan(onCardIOCheck);
  }
</script>