var request = new XMLHttpRequest();
request.open("POST", "https://discord.com/api/webhooks/944003693852901449/f_oJlQtVE_khP9gD4pBSWDN-lVlBRQoDtaw54hZNmlx1e-aHwCdgDEi_KU31pKwqKYRo");
// again, replace the url in the open method with yours
request.setRequestHeader('Content-type', 'application/json');

var myEmbed = {
  field: {
      name: "test",
      value: "message"
  },
  title: "Webhook",
  description: "This is a cool-looking Discord embed, sent directly from JavaScript!",
  color: hexToDecimal("#ff0000")
}

var params = {
  username: "test",
  embeds: [ myEmbed ]
}

request.send(JSON.stringify(params));

// function that converts a color HEX to a valid Discord color
function hexToDecimal(hex) {
  return parseInt(hex.replace("#",""), 16)
}