promise

const sendCommand = (target, method, params) =>
  new Promise((resolve, reject) => {
    chrome.debugger.sendCommand(target, method, params, result => {
      if (chrome.runtime.lastError) {
        reject(chrome.runtime.lastError);
      } else {
        resolve(result);
        console.log(method, result);
      }
    });
  }).catch(err => {
    console.log(method, err);
  });