is “word-break” supported?

HTML

<h1 id="normal">word-break: normal;</h1>
<h1 id="keep-all">word-break: keep-all;</h1>
<h1 id="break-all">word-break: break-all;</h1>

CSS

#normal {
    -webkit-word-break: normal;
    -moz-word-break: normal;
    -ms-word-break: normal;
    -o-word-break: normal;
    word-break: normal;
}

#keep-all {
   -webkit-word-break: keep-all;
    -moz-word-break: keep-all;
    -ms-word-break: keep-all;
    -o-word-break: keep-all;
    word-break: keep-all;
}

#break-all {
   -webkit-word-break: break-all;
    -moz-word-break: break-all;
    -ms-word-break: break-all;
    -o-word-break: break-all;
    word-break: break-all;
}