sass scss realtime compiler

-demo https://codepen.io/gnjo/pen/joqpNz
-api https://github.com/gnjo/sass.js/blob/master/docs/api.md
-本格的に使うなら worker版 dist/sass.js, demoはblocking

//core
function caller(result){
 //console.log(result)
 let iserror=(result.message)?true:false
 document.querySelector('pre.ret').textContent=(iserror)?result.formatted:result.text
 //compiled css =>result.text
}

Sass.compile(text,caller)