onchange函数，用于在有单个选项时进行选择

Question

How can i invoke a on change function when there is a single option. I am aware of the option by adding a dummy 'select' option.

<select onchange='myfunction'>
<option value ='1'>1<option>
<select>

Answer 1

You can use onclick to detect clicking on any option in the <select> .

 function myfunction() { console.log('clicked'); } 

 <select onclick='myfunction()'> <option value='1'>1</option> </select>