dev.user.js

"use strict";

(function () {
  const url = `http://localhost:%PORT%/bundle.min.user.js?${Date.now()}`;
  new Promise(function loadBundleFromServer(resolve, reject) {
    const req = GM.xmlHttpRequest({
      method: "GET",
      url: url,
      onload: function (r) {
        if (r.status !== 200) {
          return reject(r);
        }
        resolve(r.responseText);
      },
      onerror: (e) => reject(e),
    });
    if (req && "catch" in req) {
      req.catch((e) => {
        /* ignore */
      });
    }
  })
    .catch(function (e) {
      const log = function (obj, b) {
        let prefix = "loadBundleFromServer: ";
        try {
          prefix = GM.info.script.name + ": ";
        } catch (e) {}
        if (b) {
          console.log(prefix + obj, b);
        } else {
          console.log(prefix, obj);
        }
      };
      if (e && "status" in e) {
        if (e.status <= 0) {
          log("Server is not responding");
          GM.getValue("scriptlastsource3948218", false).then(function (src) {
            if (src) {
              log(
                "%cExecuting cached script version",
                "color: Crimson; font-size:x-large;"
              );
              /* eslint-disable no-eval */
              eval(src);
            }
          });
        } else {
          log("HTTP status: " + e.status);
        }
      } else {
        log(e);
      }
    })
    .then(function (s) {
      if (s) {
        /* eslint-disable no-eval */
        eval(`${s}
//# sourceURL=${url}`);
        GM.setValue("scriptlastsource3948218", s);
      }
    });
})();