jquery changes css height

In front-end development, we often need to dynamically modify the styles of page elements. As a very excellent JavaScript library, jQuery is simple, powerful, and intuitive, so it is widely used in Web development.

This article mainly introduces how to use jQuery to modify CSS height.

1. Get the element

First, we need to get the element whose height we want to modify. In jQuery, we can use a selector to get the specified element. For example, if we want to get the element with the ID example, the code is as follows:

var example = $('#example');

In this way, we have successfully obtained the element.

2. Modify the height

After obtaining the element, we need to change the height of the element by modifying the CSS style. In jQuery, you can use the height() method to get or set the height of an element.

For example, we want to set the element height to 200px, the code is as follows:

example.height('200px');

In this way, the element height is successfully modified to 200px.

3. Dynamically modify the height

Sometimes, we need to set the value of the element height according to different needs, such as dynamically modifying the element height according to the position of the page scroll bar.

In jQuery, we can use the scroll() method to listen to page scroll events and modify the element height in real time. The code is as follows:

$(window).scroll(function() {
  var scrollTop = $(this).scrollTop();
  example.height(scrollTop + 'px');
});

In this way, when the page scrolls, the height of the element will change accordingly.

4. Summary

It is very simple to use jQuery to modify the CSS height. Just get the element and use the height() method. For dynamically changing the height, you can combine it with other jQuery methods.

Hope this article can help you better understand how to use jQuery to modify CSS height.

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