src_aurelia-bodylight-plugin/src/elements/value-boolean.html
<template>
<span show.bind="!value" class="w3-theme-dark"><i class="fa fa-square-o"></i>${valuefalse}</span>
<span show.bind="value" class="w3-theme-light"><i class="fa fa-check-square-o"></i>${valuetrue}</span>
</template>