javascript - HTML select option with EJS

Question

I'm making a configuration for my web application, try to rendering it to web page. Below is part of my code. I want to the option selected to the config[0].volume has. So, if config[0].volume is '50', The selected option will be '50'. The codes are working well. But I wondered. 'How can I shorten this code?' So verbose with my code.

<select id="volume">

  <option value="1" <%= config[0].volume == '1' ? 'selected' : ''%>>1</option>
  <option value="5" <%= config[0].volume == '5' ? 'selected' : '' %>>5</option>
  <option value="10" <%= config[0].volume == '10' ? 'selected' : '' %>>10</option>
  <option value="50" <%= config[0].volume == '50' ? 'selected' : '' %>>50</option>
  <option value="75" <%= config[0].volume == '75' ? 'selected' : '' %>>75</option>
  <option value="100" <%= config[0].volume == '100' ? 'selected' : '' %>>100</option>

</select>

I think about 2 hours, but nothing comes up. Maybe I have to use jQuery or JavaScript, and add attribute to has it,

attr('selected')... ?

I have no idea, could you help me?

Answer 1

You can put it in a loop based on the option values.

<select id="volume">

<%
var options = [ "1", "5", "10", "50", "75", "100" ];
for ( var i = 0; i < options.length; i++ )
{
    var selected = ( config[0].volume == i ) ? "selected" : "";
    %><option value="<%=options[ i ] %>" <%=selected %>><%=i %></option><%
}
%>
</select>