Question

So I have a basic HTML <select> element where a user can select a number.

What I then need to do is create some list items in an unordered list based on the number they selected.

What’s the most efficient way to do that with jQuery?

Answer 1

The most efficient method may vary across browsers, but I would imagine that setting the innerHTML of a <ul> with a string of html elements would offer the best performance.

Here’s a Working Demo

$("#select").change(function() {
  var val = this.value,
      lis = '';

  for(var i=1; i <= val; i++) {
    lis += '<li> Ticket ' + i + '</li>';
  }  

  document.getElementById('list').innerHTML = lis;      
});

and HTML

  <select id="select">
    <option value="1">1 ticket</option>
    <option value="2">2 tickets</option>
    <option value="3">3 tickets</option>
    <option value="4">4 tickets</option>
    <option value="5">5 tickets</option>
    <option value="6">6 tickets</option>   
  </select>

  <ul id="list"></ul>