invidious/assets/js/watched_widget.js

"use strict";
var watched_data = JSON.parse(
  document.getElementById("watched_data").textContent,
);
var payload = "csrf_token=" + watched_data.csrf_token;

function mark_watched(target) {
  var tile = target.parentNode.parentNode.parentNode.parentNode.parentNode;
  tile.style.display = "none";

  var url =
    "/watch_ajax?action=mark_watched&redirect=false" +
    "&id=" +
    target.getAttribute("data-id");

  helpers.xhr(
    "POST",
    url,
    { payload: payload },
    {
      onNon200: function (xhr) {
        tile.style.display = "";
      },
    },
  );
}

function mark_unwatched(target) {
  var tile = target.parentNode.parentNode.parentNode.parentNode.parentNode;
  tile.style.display = "none";
  var count = document.getElementById("count");
  count.textContent--;

  var url =
    "/watch_ajax?action=mark_unwatched&redirect=false" +
    "&id=" +
    target.getAttribute("data-id");

  helpers.xhr(
    "POST",
    url,
    { payload: payload },
    {
      onNon200: function (xhr) {
        count.textContent++;
        tile.style.display = "";
      },
    },
  );
}