Adjust the dimensions of the Twitter Bootstrap Modal to match the maximum resolution of the user's screen

When the "Launch demo modal" button is clicked:

I would like the modal to adjust its width and height based on the user's screen resolution, maximizing the available space. Additionally, I want the modal to appear in the top left corner of the document.

Instead of manually setting specific width and height values, how can I make it responsive to each user's unique resolution?

Despite using the top: 0 and left: 0 properties, the modal doesn't appear correctly – it seems cut off at the top and not fully aligned to the left.

EDIT

After realizing that there was a default negative margin set by Bootstrap CSS on the modal class, I found a solution that works:

.modal {
  top: 0;
  left: 0;
  width: 100%;
  margin: 0;
}

To handle the height dynamically, I plan to use jQuery to determine the viewport height and apply it as an inline style.

jquerycsstwitter-bootstrap

Answer №1

Using only CSS 

.popup {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 100%;
  left: 0;
  margin: 0;
  width: 100%;
  height: 100%;
}
.popup-content {
  max-height: 100%;
}
.popup.fade.in {
  top: 0;
}

This method has been successfully tested in Chrome, Firefox, and Opera for the desired opening effect.

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