Set Default Drop Down Value in Bootstrap

Question

I am new to JS and would like to set a default value when the page loads. My HTML:

 <!DOCTYPE html>
    <html>
      <head>
        <script src="js/jquery.min.js"></script>
        <script src="shared/shiny.js" type="text/javascript"></script>
        <script src="css/bootstrap-3.3.6-dist/js/bootstrap.min.js"></script>
        <link rel="stylesheet" href="css/bootstrap-3.3.6-dist/css/bootstrap.min.css">
        <script src="js/app.js" type="text/javascript"></script>
      </head>
      <body>
       <div class="dropdown" id="country_select">
        <button class="btn btn-default dropdown-toggle" type="button"
          data-toggle="dropdown">Country<span class="caret"></span></button>
            <ul class="dropdown-menu">
             <li><a href="#" country-code="C1">Country1</a></li>
             <li><a href="#" country-code="C2">Country2</a></li>
             <li><a href="#" country-code="C3">Country3</a></li>
            </ul>
       </div>
     </body>

I have tried some suggestions from similar questions but these do not work in my case.The first one is:

    var main = function(){
        var data_start_type = "C1";
        var $data_type_elem = $('[country-code='+data_start_type+']');
        $('#country_select li a').text($data_type_elem.text());

    $("#country_select li a").on("click", function () {
            var country_selected=$(this).text();
            Shiny.onInputChange('this_country', country_selected);  //send selected data to the server script
    });
};

    $(document).ready(main);

The code above sets all the options of the drop down as 'Country1'. I found this suggestion that I put this below my JS code but it does not set any default value.

$('#country_select li a')[2].click();

Could someone please point out how I can fix this?

Answer 1

You want be able to do this with a list, since a list is not made for dropdown-menues.

Try this:

<select>
<option>.....</option>
<option selected="selected">Select a language</option>
<option>.....</option>
<option>.....</option>
<option>.....</option>
</select>

Answer 2

Are you sure you placed your code correctly?

var main = function(){
    var $menu_items = $("#country_select li a");

    $menu_items.on("click", function () {
        Shiny.onInputChange('this_country', $(this).text());
    });
    $menu_items[0].click(); // 0 for Country1, 1 for Country2, etc
};
$(document).ready(main);

Edit: Here's a demo . If you open the Console at the bottom, you'll see the default value.

Set Default Drop Down Value in Bootstrap

Question

2 answers

solution1
0

solution2
0 2016-05-23 07:53:58

Set Default Drop Down Value in Bootstrap

Question

2 answers

solution1 0

solution2 0 2016-05-23 07:53:58

solution1
0

solution2
0 2016-05-23 07:53:58