gecko-dev/dom/workers/test/WorkerDebuggerGlobalScope.enterEventLoop_debugger.js

"use strict";

var frames = [];

var dbg = new Debugger(global);
dbg.onDebuggerStatement = function(frame) {
  frames.push(frame);
  postMessage("paused");
  enterEventLoop();
  frames.pop();
  postMessage("resumed");
};

this.onmessage = function(event) {
  switch (event.data) {
    case "eval":
      frames[frames.length - 1].eval("f()");
      postMessage("evalled");
      break;

    case "ping":
      postMessage("pong");
      break;

    case "resume":
      leaveEventLoop();
      break;
  }
};