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    • <!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <title>ZingGrid: Docs Getting Started</title>
  <!--Script Reference[1]-->
  <script nonce="undefined" src="https://cdn.zinggrid.com/zinggrid.min.js"></script>
  <style>
    html,
    body {
      height: 100%;
      width: 100%;
      margin: 0;
      padding: 0;
    }



    zing-grid[loading] {
      height: 277px;
    }
  </style>
</head>

<body>
  <zing-grid caption="Register Custom Validator" editor>
    <zg-colgroup>
      <zg-column index="first" validator="startsWithUpper"></zg-column>
      <zg-column index="last"></zg-column>
      <zg-column index="number"></zg-column>
    </zg-colgroup>
    <zg-data data='[
        { "first": "Maria", "last": "John", "number": 123 },
        { "first": "David", "last": "Smith", "number": 456 },
        { "first": "Felicity", "last": "Snow", "number": 789 }
      ]'></zg-data>
  </zing-grid>
  <script>
    ZingGrid.setLicense(['26ccbfec16b8be9ee98c7d57bee6e498']);
    let customValidator = function(text) {
      let firstLetter = text[0];
      return firstLetter.toUpperCase() === firstLetter;
    };
    ZingGrid.registerValidator(customValidator, 'startsWithUpper');
  </script>
</body>

</html>
    <!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <title>ZingGrid: Docs Getting Started</title>
  <!--Script Reference[1]-->
  <script src="https://cdn.zinggrid.com/zinggrid.min.js"></script>
</head>

<body>
  <zing-grid caption="Register Custom Validator" editor>
    <zg-colgroup>
      <zg-column index="first" validator="startsWithUpper"></zg-column>
      <zg-column index="last"></zg-column>
      <zg-column index="number"></zg-column>
    </zg-colgroup>
    <zg-data data='[
        { "first": "Maria", "last": "John", "number": 123 },
        { "first": "David", "last": "Smith", "number": 456 },
        { "first": "Felicity", "last": "Snow", "number": 789 }
      ]'></zg-data>
  </zing-grid>
</body>

</html>
    html,
body {
  height: 100%;
  width: 100%;
  margin: 0;
  padding: 0;
}
    let customValidator = function(text) {
  let firstLetter = text[0];
  return firstLetter.toUpperCase() === firstLetter;
};
ZingGrid.registerValidator(customValidator, 'startsWithUpper');