README.md

cssfetch

PropellerAds offers a free CORS-bypassing proxy. Their ad code uses it, and so can you. It's not blocked by adblockers yet, but it should be. Blocked now :)

Usage

Just like fetch, but only with a URL.

cssfetch.js

async function cssfetch(url){
  const frame = await new Promise(cb=>
    document.body.appendChild(
      Object.assign(
        document.createElement("iframe"),
        {
          srcdoc: "<div class=widget-col-10-sp></div><link rel=stylesheet href=\"https://cosatoos.com/lol.css?"+btoa(new URL(url, location.href).href)+"\">",
          onload(){cb(this)},
          sandbox: "allow-same-origin",
          width: 0,
          height: 0,
          frameBorder: 0
        }
      )
    )
  )
  response = getComputedStyle(frame.contentWindow.document.body.children[0], ':before').getPropertyValue('content').replace(/['"\(\)\s]/g, "")
  if(response == "none") return new Response("Error", {status: 500})
  response = await fetch("data:application/octect-stream;base64,"+response)
  return response
}