How to Animate a Div from a Fixed Height to Its Auto Height in jQuery?

The provided code:

$("div:first").click(function(){
  $("#first").animate({
    height: "auto"
  }, 1000 );
});

encounters issues because browsers will not animate a change in height from a fixed value to "auto."

To achieve the desired animation, follow these steps:

1. Save the current height:

var curHeight = $('#first').height();

2. Set the height to "auto" temporarily:

$('#first').css('height', 'auto');

3. Get the auto height:

var autoHeight = $('#first').height();

4. Restore the current height and animate to the auto height:

$('#first').height(curHeight).animate({height: autoHeight}, 1000);

This solution works because it first retrieves the current height, allowing the browser to determine its final height when set to "auto."

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