I'm using Object.keys(chars).map(...)
to loop in render
// chars = {a:true, b:false, ..., z:false}
render() {
return (
<div>
{chars && Object.keys(chars).map(function(char, idx) {
return <span key={idx}>{char}</span>;
}.bind(this))}
"Some text value"
</div>
);
}