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- <select>
- <option class="a">aaaaa</option>
- <option class="a">a</option>
- <option class="a">a</option>
- <option class="a">a</option>
- <option class="a">a</option>
- <option class="a">a</option>
- <option class="a">a</option>
- <option class="a">a</option>
- <option class="a">a</option>
- <option class="a">a</option>
- <option class="a">a</option>
- <option class="a">a</option>
- <option class="a">a</option>
- <option class="b">b</option>
- <option class="b">b</option>
- <option class="b">b</option>
- <option class="b">b</option>
- <option class="b">b</option>
- <option class="b">b</option>
- <option class="b">b</option>
- <option class="b">b</option>
- <option class="b">b</option>
- <option class="b">b</option>
- <option class="b">b</option>
- <option class="b">b</option>
- <option class="b">b</option>
- <option class="b">b</option>
- <option class="b">b</option>
- <option class="b">b</option>
- <option class="b">b</option>
- <option class="b">b</option>
- <option class="b">b</option>
- <option class="b">b</option>
- <option class="b">b</option>
- <option class="b">b</option>
- <option class="b">b</option>
- </select>
- <button>click me</button>
- $('button').on('click', function(ev) {
- ev.preventDefault();
- $('.a').prop('disabled',true);
- if($('select').find('option:selected').prop('disabled')) {
- $('select').find('option:enabled:first').prop('selected',true);
- };
- });
- option[disabled] {
- display: none;
- }
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