isolation

The isolation CSS property defines if the element must create a new stacking context.

/* Keyword values */
isolation: auto;
isolation: isolate;
/* Global values */
isolation: inherit;
isolation: initial;
isolation: unset;

This especially useful in conjunction with background-blend-mode that only blend background in a given stacking context: it allows to isolate groups of elements from their deeper background and to blend their background color together.

Syntax

One of the keyword values listed below.

Values

auto

Is a keyword indicating that a new stacking context has to be created only if one properties applied to the element requires it.

isolate

Is a keyword indicating that a new stacking context must be created.

Formal syntax

auto | isolate

Examples

<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>

.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;
}

Specifications

Browser compatibility

See also

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