isolation

The isolation CSS property determines whether an element must create a new stacking context.

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

This property is especially helpful when used in conjunction with mix-blend-mode.

Syntax

/* Keyword values */
isolation: auto;
isolation: isolate;

/* Global values */
isolation: inherit;
isolation: initial;
isolation: unset;

The isolation property is specified as one of the keyword values listed below.

Values

auto

A new stacking context is created only if one of the properties applied to the element requires it.

isolate

A new stacking context must be created.

Formal definition

Formal syntax

auto | isolate

Examples

Forcing a new stacking context for an element

HTML

<div id="b" class="a">
  <div id="d">
    <div class="a c">auto</div>
  </div>
  <div id="e">
    <div class="a c">isolate</div>
  </div>
</div>

CSS

.a {
  background-color: rgb(0,255,0);
}
#b {
  width: 200px;
  height: 210px;
}
.c {
  width: 100px;
  height: 100px;
  border: 1px solid black;
  padding: 2px;
  mix-blend-mode: difference;
}
#d {
  isolation: auto;
}
#e {
  isolation: isolate;
}

Result

Specifications

Browser compatibility

See also

• <blend-mode>
• mix-blend-mode, background-blend-mode