reminder for Prism

filehighlight.js

function loadFile(src, cb) {
    var xhr = new XMLHttpRequest();
    var s = [];
    xhr.open("GET", src, true);
    xhr.onreadystatechange = function() {
        if (xhr.readyState == 4) {
            if (xhr.status < 400 && xhr.responseText) {
                s = [src,xhr.responseText]
            } else if (xhr.status >= 400) {
               s = [src, "✖ Error " + xhr.status + " while fetching file: " + xhr.statusText]
            } else {
              s = [src,  "✖ Error: File does not exist or is empty"]
            }
            cb(s)
        }
    };
    xhr.send(null);
}
function callerbacker(a){
    console.log(a)
}
loadFile("plugins/file-highlight/index.html", callerbacker)