HTML Code

<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>hasData batch audit</title>

  <style>

    body { font-family: sans-serif; padding: 16px; max-width: 560px; }

    [data-widget] { background: #ecfdf5; padding: 8px; margin: 6px 0; border-radius: 6px; }

    pre { background: #f1f5f9; padding: 12px; border-radius: 6px; font-size: 14px; }

    button { margin-top: 8px; padding: 10px 16px; background: #6366f1; color: #fff; border: none; border-radius: 6px; cursor: pointer; }

  </style>

</head>

<body>

  <div id="sidebar">

    <div id="widget-a" data-widget>Widget A</div>

    <div id="widget-b" data-widget>Widget B (pristine)</div>

    <div id="widget-c" data-widget>Widget C</div>

  </div>

  <button type="button">Setup + Audit</button>

  <pre id="out">Click to init some widgets and run audit.</pre>

  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>

  <script>

    function auditSection(selector) {

      var withData = [];

      $(selector).each(function() {

        if (jQuery.hasData(this)) {

          withData.push(this.id);

        }

      });

      return withData;

    }

    $("button").on("click", function() {

      $("#widget-a").data("ready", true);

      $("#widget-c").on("click", function() {});

      var dirty = auditSection("#sidebar [data-widget]");

      $("#out").text(

        "Elements with jQuery data:\n" +

        (dirty.length ? dirty.join(", ") : "(none)") +

        "\n\nwidget-b stays clean; a has data; c has click handler."

      );

    });

  </script>

</body>

</html>

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jQuery.hasData() — batch audit (Try It)