I get all that teach a man to fish, but for those of us in a bind, here is the code:
function settime(objectid, schedulechange, mtoken){
let layerURL = `https://services.arcgis.com/`;
let formParams = `f=json&rollbackOnFailure=true&token=`+ mtoken +`&features={
"attributes": {
"OBJECTID":` + objectid + `,
"Instructions":` + schedulechange + `
}
}`
let http = new XMLHttpRequest();
http.open("POST", layerURL, false);
//Send the proper header information along with the request
http.setRequestHeader("Content-type", "application/x-www-form-urlencoded; charset=UTF-8");
//Call a function when the state changes.
http.onreadystatechange = function() {
if (http.readyState == 4 && http.status == 200) {
console.log(http.responseText);
}
};
http.send(formParams)
console.log("Layer done");
