What CSS Properties Create a Stacking Context?

Understanding Stacking Contexts in CSS

In CSS, a stacking context defines the three-dimensional space in which elements are positioned and layered. Properties that establish a stacking context create a new layering hierarchy, influencing how elements overlap and interact.

Apart from the well-known z-index property, several other CSS properties can create a stacking context:

1. Transform: Any transform property other than none establishes a stacking context. This includes translations, rotations, and scaling.
2. Opacity: Setting the opacity property to a value less than 1 creates a stacking context. This is because transparent elements can affect the stacking order of other elements.
3. Perspective: The perspective property, which creates the illusion of depth, also establishes a stacking context. This property is used for 3D transformations.

However, it's important to note that not all CSS properties that affect element positioning create a stacking context. For example, the position property, while essential for positioning elements, does not itself establish a stacking context.

Other properties that create a stacking context include:

• flow-from
• page-margin-box
• filter
• will-change
• clip-path/mask

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