ignored characters in javascript

test ignored characters.js

function getIgnoredChars(payload, insertionPoint)
{
 var asciiMax = 65535;
  var ignoredChars = [];
  for(var i = 0; i < asciiMax; i++) {
   var test = String.fromCharCode(i);
    var urlStr = payload.slice(0, insertionPoint) + test + payload.slice(insertionPoint);
   try {
        var url = new URL(urlStr);
        if(url.protocol == "javascript:") {
            ignoredChars.push(test);
        }
    } catch (e) {}
}
  return ignoredChars;
}
atStart = getIgnoredChars("javascript:",0) //get character that can be present before the URI
atEnd = getIgnoredChars("javascript:",10) //get character that can be present before the ':'
aftertBeforeColon = getIgnoredChars("javascript:",9) //get character that can be present before anywhere inside the 'javascript' part
inTheMiddle = getIgnoredChars("javascript:",5) //get character that can be present before anywhere inside the 'javascript' part
console.log('done')

console.log("at the start" + JSON.stringify(atStart));
console.log("at the end" + JSON.stringify(atEnd));
console.log("between 't' and ':'" + JSON.stringify(aftertBeforeColon));
console.log("int the middle" + JSON.stringify(inTheMiddle));