What are the ways to show hidden elements?

Methods to display hidden elements include using CSS styles, using CSS style transparency, and using CSS style positioning. Detailed introduction: 1. Using CSS styles is a common way to display and hide web page elements. You can use the display attribute to control the display and hiding of elements; 2. Use CSS style transparency. The opacity attribute of CSS styles can change the transparency of elements. , thereby achieving the effect of hiding and displaying elements; 3. Using CSS style position, the position attribute of CSS style can control elements, etc.

The operating system for this tutorial: Windows 10 system, DELL G3 computer.

There are many ways to show and hide web page elements. Here are some common methods:

1. Use CSS styles:

Use CSS styles is a common way to show and hide web page elements. You can use the display attribute to control the display and hiding of elements. Here are some examples:

• Hide element: Setting the element's display attribute to none can make the element completely hidden and does not occupy page space.

.hidden {display: none;}

• Display elements: Set the element's display attribute to block or inline to display the element.

.visible {display: block;}

2. Use CSS style transparency:

Use the opacity attribute of CSS style to change the transparency of the element, thereby achieving the effect of hiding and showing the element. . Here are some examples:

• Hidden elements: Setting an element's opacity property to 0 makes the element completely transparent, making it appear as if the element is hidden. However, it should be noted that this method does not delete the element from the page source code.

.transparent {opacity: 0;}

• Display element: Setting the element's opacity property to 1 makes the element fully opaque, thereby displaying the element.

.opaque {opacity: 1;}

3. Use CSS style position:

Use the position attribute of CSS style to control the position of the element. Set the element's position attribute to absolute, and set its top and left attributes to large negative values ​​to place the element in an invisible area of ​​the page to achieve the effect of hiding the element. Here are some examples:

• Hidden elements: Setting the element's position property to absolute and setting its top and left properties to large negative values ​​can make the element invisible on the page. visible. However, it should be noted that this method does not delete the element from the page source code.

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

• 显示元素：将元素的position属性设置为合适的值（如static或relative），并设置合适的top和left值可以使元素显示在页面上。

.visible {position: relative;top: 10px;left: 20px;}

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