Is there a way to ensure a dialog box is positioned in the center of the window?

After adjusting the dimensions of my jQuery UI dialog box with the following code:

height: $(window).height(),
width: $(window).width(),

I noticed that it is no longer centered on the window. Do you have any suggestions on how I can recenter it?

Answer №1

Check out the function below and adjust the variable values to fit your needs

function positionLightboxImage() {
  var top = ($(window).height() - $('#lightbox').height()) / 2;
  var left = ($(window).width() - $('#lightbox').width()) / 2;
  console.log("Calculated position:");
  console.log(top,left);
  $('#lightbox')
    .css({
      'top': top + $(document).scrollTop(),
      'left': left
    })
    .fadeIn();
  console.log('jQuery selection:');
  console.log($('#lightbox'));
}

Answer №2

Indicates the desired location for the dialog to appear. Options include: 1) a single string specifying position within the viewport: 'center', 'left', 'right', 'top', 'bottom'. 2) an array with x,y coordinates indicating pixel offset from the top left corner of the viewport (e.g. [350,100]) 3) an array with x,y position string values (e.g. ['right','top'] for the top right corner).

Examples of code:

Set the position option when initializing a dialog. $( ".selector" ).dialog({ position: 'top' }); Retrieve or change the position option after initialization. //get var position = $( ".selector" ).dialog( "option", "position" ); //set $( ".selector" ).dialog( "option", "position", 'top' );

position : 'center'

Answer №3

When dealing with a dialog box that employs absolute positioning, you may want to try the following steps after resizing:

$('#dialog').animate({ 
    'top' : ($(window).height() - $('#dialog').outerHeight()) / 2 + $(document).scrollTop(),
    'left': ($(window).width() - $('#dialog').outerWidth()) / 2 + $(document).scrollLeft()
});

This action will effectively center the dialog box on the screen.

In cases where the dialog box utilizes fixed positioning, simply exclude the $(document).scrollTop() and $(document).scrollLeft() from the calculation process.

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