Custom select jquery not working in ISO(iphone)?

Question

JavaScript

Hi all! I don’t understand why it doesn’t work in iphone custom select, it doesn’t drop out as a list, but the window of ios itself appears at the bottom with a choice? The project uses fancySelect, below is the code, we tried to connect another plugin, the same reaction.

<select id="number_of_years"
                                                          required onchange="({})"
                                                            name="number_of_years">
                                                        <option value="" selected="selected"></option>
                                                        <option value="1">1 год
                                                        </option>
                                                        <option value="2">3 года 
                                                        </option>
                                                    </select>