css hide label

CSS hides tags

In web design, we often need to control the display and hiding of page elements. One way is to use CSS to hide the label. This article will introduce some common CSS techniques to help you master how to use CSS to hide labels.

1. display attribute

The display attribute of CSS controls how an element is displayed. It has several common values:

• none: completely hides the element and takes up no space.
• block: Display the element as a block-level element, that is, on its own line.
• inline: Display the element as an inline element and will not occupy a line.

The following is an example that demonstrates how to use the display attribute to hide an element:

<style>
  .hidden {
    display: none;
  }
</style>
<div class="hidden">这个元素被隐藏了。</div>

2. visibility attribute

The visibility attribute controls the visibility of an element Visibility, which has two common values:

• visible: The element is visible.
• hidden: The element is not visible, but still takes up space.

The following is an example that demonstrates how to use the visibility attribute to hide an element:

<style>
  .hidden {
    visibility: hidden;
  }
</style>
<div class="hidden">这个元素被隐藏了，但仍然占据空间。</div>

3. opacity attribute

The opacity attribute controls the element's transparency. When its value is 0, the element is completely transparent and invisible. A value of 1 makes the element fully opaque and visible.

The following is an example that demonstrates how to use the opacity attribute to hide an element:

<style>
  .hidden {
    opacity: 0;
  }
</style>
<div class="hidden">这个元素被隐藏了，但仍然占据空间。</div>

4. height and width attributes

height and width attributes control elements height and width. When setting their value to 0, the elements will be invisible. At this point, the element still takes up space.

The following is an example that demonstrates how to use the height and width attributes to hide an element:

<style>
  .hidden {
    height: 0;
    width: 0;
  }
</style>
<div class="hidden">这个元素被隐藏了，但仍然占据空间。</div>

5. position and left attributes

The position attribute controls the element positioning method. When its value is set to absolute, the element is removed from the document flow and positioned relative to the nearest positioned ancestor element. At this point, the element does not occupy space. The left attribute represents the position of the left side of the element. If it is set to a negative number, the element will be hidden outside the viewport.

The following is an example that demonstrates how to hide an element using the position and left attributes:

<style>
  .hidden {
    position: absolute;
    left: -1000px;
  }
</style>
<div class="hidden">这个元素被隐藏了，不再占据空间。</div>

Conclusion

CSS provides many methods to hide labels. According to different needs, choose different attributes and values ​​to achieve the hiding effect. It should be noted that some methods may affect the layout, so they need to be used with caution. I hope this article can help you master the technique of hiding tags in CSS.

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