ImportJSON/ImportCSVDialog.html at master · yosoymin/ImportJSON · GitHub

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<!DOCTYPE html>
<html>
<head>
  <script>
    function onApiLoad() {
      document.getElementById('file-input').addEventListener('change', readSingleFile, false);
    }

    function readSingleFile(e) {
      var file = e.target.files[0];
      if (!file)
        return;

      var reader = new FileReader();
      reader.onload = function(e) {
        google.script.run.withSuccessHandler(importOk).withFailureHandler(showResult).importCSVFactura(e.target.result);
      };
      reader.readAsText(file);
    }

    function importOk(contents) {
      showResult(contents);
      google.script.host.close();
    }

    function showResult(message) {
      document.getElementById('result-header').innerHTML = "Result:"
      document.getElementById('result').innerHTML = 'Error: ' + message;
    }
  </script>
</head>
<body>
  <div>
    <input type="file" id="file-input"/>
    <h3 id="result-header"/>
    <p id="result"/>
  </div>
  <script src="https://apis.google.com/js/api.js?onload=onApiLoad"></script>
</body>
</html>