firefox/testing/web-platform/tests/css/support/width-keyword-classes.css

/*
    Take every possible line break so the box width is the width of largest
    unbreakable line box.
*/
.min-content {
    width: min-content;
}

.max-content {
    width: max-content;
}

/*
   Shrink wrap just like floating.
   max(min-content, min(max-content, fill-available))
*/
.fit-content {
    width: fit-content;
}

.max-width-min-content {
    max-width: min-content;
}

.max-width-max-content {
    max-width: max-content;
}

.max-width-fit-content {
    max-width: fit-content;
}

.min-width-min-content {
    min-width: min-content;
}

.min-width-max-content {
    min-width: max-content;
}

.min-width-fit-content {
    min-width: fit-content;
}