Codebase Browser
chromium
Go to App

chromium/third_party/blink/manual_tests/select_webkit_appearance_off_popup_alignment.html 

<html>

<body>
  <p>Manual test for popup alignment of select with no apperance.</p>

  <p>All popup boxes should all align with select element on both left and right side.</p>

  No scrollbar in popup:<br>
  
  LTR: <select size="1" style="-webkit-appearance: none;">
    <option>Item 1</option>
    <option>Item 2</option>
    <option>Item 3</option>
    <option>Item 4</option>
    <option>Item 5</option>
  </select>

  RTL: <select size="1" dir="rtl" style="-webkit-appearance: none;">
    <option>Item 1</option>
    <option>Item 2</option>
    <option>Item 3</option>
    <option>Item 4</option>
    <option>Item 5</option>
  </select>

  <br>

  Popup has scrollbar:<br>
  LTR: <select size="1" style="-webkit-appearance: none; padding-right: 20px;">
    <option>Item 1</option>
    <option>Item 2</option>
    <option>Item 3</option>
    <option>Item 4</option>
    <option>Item 5</option>
    <option>Item 6</option>
    <option>Item 7</option>
    <option>Item 8</option>
    <option>Item 9</option>
    <option>Item 10</option>
    <option>Item 11</option>
    <option>Item 12</option>
    <option>Item 13</option>
    <option>Item 14</option>
    <option>Item 15</option>
    <option>Item 16</option>
    <option>Item 17</option>
    <option>Item 18</option>
    <option>Item 19</option>
    <option>Item 20</option>
    <option>Item 21</option>
  </select>

  RTL: <select size="1" dir="rtL" style="-webkit-appearance: none; padding-left: 20px;">
    <option>Item 1</option>
    <option>Item 2</option>
    <option>Item 3</option>
    <option>Item 4</option>
    <option>Item 5</option>
    <option>Item 6</option>
    <option>Item 7</option>
    <option>Item 8</option>
    <option>Item 9</option>
    <option>Item 10</option>
    <option>Item 11</option>
    <option>Item 12</option>
    <option>Item 13</option>
    <option>Item 14</option>
    <option>Item 15</option>
    <option>Item 16</option>
    <option>Item 17</option>
    <option>Item 18</option>
    <option>Item 19</option>
    <option>Item 20</option>
    <option>Item 21</option>
  </select>

</body>
</html>