下拉选择包含div单击纯javascript

Question

<div class="container">
  <select class="form_select">
    <option>the option</option>
  </select>
</div>

<style>
  .container {
    width: 300px;
    border:1px solid blue;
  }
  select {
    max-width:50px;
  }
</style>

I have a div containing a select option. The div is larger than the select box. Using a pure javascript solution, I would like the select dropdown to happen when the containing div is clicked outside the select box area. The only solutions I have found are jquery and I am seeking a pure javascript solution.

I don't need exact code (but it helps) as I am not very good with javascript so please explain any answer completely.

https://jsfiddle.net/m6s5j9sj/1/

Answer 1

There may not be a simple way but you can try to set the size & length . The catch is it will only work if length is greater than 1. So in the demo I have created another option 'Select'.Hopefully in your application there will be multiple option

 document.getElementById('container').addEventListener('click', function(e) { var seleOpt = document.getElementsByClassName('form_select')[0]; seleOpt.size = seleOpt.options.length; }) 

 .container { width: 300px; border: 1px solid blue; } select { max-width: 50px; } 

 <div class="container" id="container"> <select class="form_select"> <option>Select</option> <option>the option</option> </select> </div>