js-refresh.user.js

// ==UserScript==
// @name         js-refresh
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @require      http://cdn.bootcss.com/crypto-js/3.1.2/rollups/sha1.js
// @match        http://m.kankan.com/v/*
// @match        */*
// @run-at       document-idle
// @grant        GM_xmlhttpRequest
// ==/UserScript==
/* eslint-disable */
(function (){
  'use strict';

  var s = document.createElement('script');
  s.src = (window.SURL || 'http://127.0.0.1:8080/index.js') + '?' + Math.random();
  s.async = true;
  if(!document.querySelector('script')){
    document.body.appendChild(s);
  }


  setInterval(()=>{
    GM_xmlhttpRequest({
      method: "GET",
      url: s.src + "?" + Math.random(),
      onload: function (response){
        var last = localStorage.getItem('lastscript');
        var str = response.responseText;
        var sha = CryptoJS.SHA1(str).toString();
        //console.log(sha);
        localStorage.setItem('lastscript', sha + '');
        if( last != sha )
          window.location.reload();
      }
    });
  }, 3000);
})();