Scrollbar is disabled when Bootstrap modal is opened
<p>I make the Scrollbar of page always visible by using the following code:</p>

<pre><code>html {
    overflow-y: scroll; 
}
</code></pre>

<p>However, when opening Bootstrap modal, the main scrollbar is not available (visible but disabled) and when trying to some code as shown below does not solve the problem. </p>

<pre><code>.modal-open {    
    overflow-y: scroll !important; 
}
</code></pre>

<p>What I want to try the following approaches:</p>

<p>1) I want the main scrollbar is enabled even if modal is open</p>

<p>2) I want the scrollbar of the modal is visible automatically, but when I use overflow-y:scroll; the height of the modal-body cannot be increased automatically and scrollbar on the modal content seems to be disabled (when I set the height, scrollbar is enabled, but ı want to use auto height). Any idea?</p>