changing the default width of bootstrap modal

Question

I am trying to change the default width of the dialog but it's not working.I have tried solutions mentioned in this post. Here is my HTML code below:

<style>

#myDialog .modal-dialog{

width:80%;

}


</style>


<div id="myDialog" class="modal fade" tabindex="-1" role="dialog">
    <div class="modal-dialog" role="document">
        <div class="modal-content">
            <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal" aria-label="Close"><i class="fa fa-times"></i></button>
                <div class="modal-title" id="Dialog_title">Text Document</div>
            </div>
            <div class="modal-body">

                <div id="my_doc_content"></div>

            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-default" data-dismiss="modal" onclick="rg.closeDialog('myDialog');">Close</button>
            </div>
        </div>
    </div>
</div>

Answer 1

Override the .modal-dialog width

.modal-dialog{
   width: 80%;
   margin: auto;
}

Place this piece of code in after the bootstrap.min.css to override its default width.

Here is working fiddle

Answer 2

Here is a JSFiddle that may help you: Working JSFiddle

When CSS style is added on the class .modal instead of .modal-dialog, you can then simply change the width of the modal as you want by the following code:

.modal{
    width: 80%; /* respsonsive width */
    margin-left:-40%; /* width/2) */ 
}

$(function() {
  $("#myDialog").modal("show");
});

.modal-dialog {
  width: 80%;
  margin: auto;
}
.modal{
  width: 80%; /* respsonsive width */
  margin-left:-40%; /* width/2) */ 
}

<div id="myDialog" class="modal fade" tabindex="-1" role="dialog">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-label="Close"><i class="fa fa-times"></i></button>
        <div class="modal-title" id="Dialog_title">Text Document</div>
      </div>
      <div class="modal-body">

        <div id="my_doc_content"></div>

      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-default" data-dismiss="modal" onclick="rg.closeDialog('myDialog');">Close</button>
      </div>
    </div>
  </div>
</div>

Hope this helps you!