is all supported?

by David Storey

HTML

<div id="parent">
    <p id="inherit">inherit</p>
    <p id="initial">initial</p>
    <p id="unset">unset</p>
</div>

CSS

#parent {
    background: red;
    color: pink;
    border: 4px solid;
    margin: 2em;
    padding: 1em;
}
#inherit {
    -webkit-all: inherit;
    -moz-all: inherit;
    -ms-all: inherit;
    all: inherit;
}
#initial {
    -webkit-all: initial;
    -moz-all: initial;
    -ms-all: initial;
    all: initial;
}
#unset {
    -webkit-all: unset;
    -moz-all: unset;
    -ms-all: unset;
    all: unset;
}