tampermonkey userscripts for cookies and localStorage

debug_cookie_set.js

// ==UserScript==
// @name         debug cookie set
// @namespace    https://josepedrodias.com/
// @version      0.1
// @description  yada yada
// @author       jose.pedro.dias@gmail.com
// @match        https://putyoursitehere/*
// @grant        none
// ==/UserScript==

(function () {
  'use strict';

  const ignores = [
    'test'
  ];

  // based on https://stackoverflow.com/questions/41245885/breaking-javascript-execution-always-when-cookie-is-set

  function debugAccess(obj, prop) {
    let origValue = obj[prop];
    Object.defineProperty(obj, prop, {
      get: function () {
        // debugger;
        return origValue;
      },
      set: function (val) {
        const parts = val.split('=');
        const key = parts.shift();
        const value = parts.join('=');

        if (ignores.indexOf(key) === -1) {
          console.error(`cookie set\n${key}\n=\n${value}\n`);
          debugger;
        }

        return (origValue = val);
      },
    });
  }
  debugAccess(document, 'cookie');
})();

debug_localStorage_setItem.js

// ==UserScript==
// @name         debug localStorage.setItem()
// @namespace    https://josepedrodias.com/
// @version      0.1
// @description  yada yada
// @author       jose.pedro.dias@gmail.com
// @match        https://putyoursitehere/*
// @grant        none
// ==/UserScript==

(function () {
  'use strict';

  // based on https://gist.github.com/mynameislau/b7eabfcdc0a17ac41cdc0b974f94d807

  const ignores = [
    'test'
  ];

  Object.defineProperty(window, 'localStorage', {
    configurable: true,
    enumerable: true,
    value: new Proxy(localStorage, {
      set: function (ls, prop, value) {
        if (ignores.indexOf(prop) === -1) {
          //console.error(`LS direct assignment of ${prop}`);
          debugger;
        }
        ls[prop] = value;
        return true;
      },
      get: function (ls, prop) {
        if (prop !== 'setItem') {
          if (typeof ls[prop] === 'function') {
            return ls[prop].bind(ls);
          } else {
            return ls[prop];
          }
        }
        return (...args) => {
          const key = args[0];
          if (ignores.indexOf(key) === -1) {
            //console.error(`LS setItem(${key})`);
            debugger;
          }
          ls.setItem.apply(ls, args);
        };
      },
    }),
  });
})();