Source code

Revision control

Copy as Markdown

Other Tools

Test Info:

<style type="text/css">↩
optgroup {overflow-x: hidden;}↩
</style>↩
<select>↩
<optgroup label="optgroup">↩
<option>1</option>↩
<option>2</option>↩
<option>3</option>↩
<option>4</option>↩
<option>5</option>↩
<option>6</option>↩
<option>7</option>↩
<option>8</option>↩
<option>9</option>↩
<option>10</option>↩
<option>11</option>↩
<option>12</option>↩
<option>13</option>↩
<option>14</option>↩
<option>15</option>↩
<option>16</option>↩
<option>17</option>↩
<option>18</option>↩
<option>19</option>↩
<option>20</option>↩
</optgroup>↩
</select>↩