What is the best way to use jQuery to animate a particular height up to 100%?

To provide a sneak peek of the content in the div, I have minimized it so only the first line is visible. Now, I want to add an animation that will expand the div to 100% height when you click the title. However, using animate(height:"100%") does not result in a smooth sliding effect.

<a href="javascript:void(0);" class="show_it">title:</a>
<div>
    content<br>
    content_hidden
</div>

<script>
$('.show_it').click(function() {
  $(this).next("div").animate({
    height: 'auto'
  }, 1000, function() {
  });
});
</script>

<style>
div{
    height:20px;
    overflow:hidden;
}
</style>

Answer №1

While there may be more efficient methods available, the following approach is presented as a last resort:

$('.show_it').click(function() {

// Animate to 100% in 1 millisecond
$(this).parent().next("div").animate({height: 'auto'}, 1);

// Record the height of the div
var newHeight = $(this).parent().next("div").height();

// Animate height to 0% in 1 millisecond
$(this).parent().next("div").animate({height: '0px'}, 1);

// Perform the animation using the new fixed height.
  $(this).parent().next("div").animate({
    height: newHeight,
  }, 1000, function() {
  });
});

It should be noted that this method is considered crude; for a more elegant solution, consider utilizing jquery slideDown();.

Answer №2

Alternatively:

$('.display_hide').on('click', function(){
   $(this).parent().next("div").css("height", "100%");
   var height = $(this).parent().next("div").height();
   $(this).parent().next("div").css("height", "0px");
   $(this).parent().next("div").animate({height: height}, 1200, function() {
   });
});

Answer №3

Give this a shot

$('.reveal_button').on('click', function() {
  var $parentDiv = $(this).closest('.section');
  var totalHeight = 0;
  
  $parentDiv.children().each(function(){
    totalHeight += $(this).height();
  });
  
  $parentDiv.animate({
    height: totalHeight
  }, 1000, function() {
    // Animation complete.
  });
});

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