prompt: What are resolve and reject in this function?
  function getData(url) {
      // Return a new promise.
      return new Promise(function (resolve, reject) {
          // Do the usual XHR stuff
          var req = new XMLHttpRequest();
          // Make sure to call .open asynchronously
          req.open('GET', url, true);
  
          req.onload = function () {
              // This is called even on 404 etc
              // so check the status
              if (req.status === 200) {
                  // Resolve the promise with the response text
                  resolve(req.response);
              } else {
                  // Otherwise reject with the status text
                  // which will hopefully be a meaningful error
                  reject(Error(req.statusText));
              }
          };
  
          // Handle network errors
          req.onerror = function () {
              reject(Error('Network Error'));
          };
  
          // Make the request
          req.send();
      });
  };
chosen.role: system
chosen.content: A chat.
chosen.role: user
chosen.content: What are resolve and reject in this function?
  function getData(url) {
      // Return a new promise.
      return new Promise(function (resolve, reject) {
          // Do the usual XHR stuff
          var req = new XMLHttpRequest();
          // Make sure to call .open asynchronously
          req.open('GET', url, true);
  
          req.onload = function () {
              // This is called even on 404 etc
              // so check the status
              if (req.status === 200) {
                  // Resolve the promise with the response text
                  resolve(req.response);
              } else {
                  // Otherwise reject with the status text
                  // which will hopefully be a meaningful error
                  reject(Error(req.statusText));
              }
          };
  
          // Handle network errors
          req.onerror = function () {
              reject(Error('Network Error'));
          };
  
          // Make the request
          req.send();
      });
  };
chosen.role: assistant
chosen.content: In the getData function, resolve and reject are arguments provided to the callback parameter of the returned promise. These are functions that can be called within the callback to set the status of the promise to either resolved or rejected and provide a value corresponding to the new status.
rejected.role: system
rejected.content: A chat.
rejected.role: user
rejected.content: What are resolve and reject in this function?
  function getData(url) {
      // Return a new promise.
      return new Promise(function (resolve, reject) {
          // Do the usual XHR stuff
          var req = new XMLHttpRequest();
          // Make sure to call .open asynchronously
          req.open('GET', url, true);
  
          req.onload = function () {
              // This is called even on 404 etc
              // so check the status
              if (req.status === 200) {
                  // Resolve the promise with the response text
                  resolve(req.response);
              } else {
                  // Otherwise reject with the status text
                  // which will hopefully be a meaningful error
                  reject(Error(req.statusText));
              }
          };
  
          // Handle network errors
          req.onerror = function () {
              reject(Error('Network Error'));
          };
  
          // Make the request
          req.send();
      });
  };
rejected.role: assistant