What are the methods to hide elements in css? Introduction to four common methods of hiding elements in css

In the process of web development, we often need to hide certain elements and display them when needed. So, what are the methods of hiding elements in CSS? This article will introduce to you how to hide elements in CSS.

There are many ways to hide page elements using css. You can set opacity to 0, visibility to hidden, display to none, or position to absolute and then set the position to the invisible area, etc. Let's take a closer look at the specific content of these css attributes to hide page elements.

Css method to hide elements: Use the opacity attribute

The opacity attribute means to retrieve or set the opacity of the object. When its transparency is 0, the visual It disappeared, but it still occupies that position and plays a role in the layout of the web page. It will also respond to user interaction. For elements with the opacity attribute added, their background and element content will also change accordingly.

.hide {
  opacity: 0;
}

Description: We can use the opacity property to achieve some great animation effects.

Note: This attribute is compatible with browsers above IE9. IE8 and earlier versions support alternative filter attributes, for example: filter:Alpha(opacity=50).

Css method to hide elements 2: Use the display attribute

The display attribute is the real hidden element. When the display attribute of the element is none, the element It will disappear from sight, and even the box model will not be generated. It will not occupy any position on the page. Not only that, even its child elements will disappear from the box model together.

.hide {
   display: none;
}

Note: Any animation effects and interactive effects added to it and its child elements will not work.

Css method three to hide elements: use visibility attribute

The visibility attribute is similar to the opacity attribute. When the attribute value is hidden, the element will be hidden and will occupy It controls its own position and affects the layout of the web page. The only difference from opacity is that it does not respond to any user interaction. Additionally, elements will be hidden in screen reading software.

.hide {
   visibility: hidden;
}

Note: This attribute can also achieve animation effects, as long as its initial and end states are different. This ensures that transition animations between visibility state switches can be time-smooth.

Css method four to hide elements: Use the position attribute

The meaning of the position attribute is to move the element out of the document flow and out of the visual area. Adding this attribute will not affect Layout, while keeping elements operable. After applying this attribute, you can mainly control the direction (top, left, right, bottom) to reach a certain value and leave the current page.

.hide {
   position: absolute;
   top: -9999px;
   left: -9999px;
}

Note: Avoid using this method to hide any focusable element, because doing so will result in an unavailable error when the user allows that element to gain focus. Expected focus switch. This method is often used when creating custom checkboxes and radio buttons.

Finally: For more knowledge about the above four attributes of opacity, display, visibility, and position, please refer to css manual.

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