@mixpanel/rrweb-utils/dist/rrweb-utils.js

This package contains the shared utility functions used across rrweb packages. See the [guide](../../guide.md) for more info on rrweb.

const testableAccessors = {
  Node: ["childNodes", "parentNode", "parentElement", "textContent"],
  ShadowRoot: ["host", "styleSheets"],
  Element: ["shadowRoot", "querySelector", "querySelectorAll"],
  MutationObserver: []
};
const testableMethods = {
  Node: ["contains", "getRootNode"],
  ShadowRoot: ["getSelection"],
  Element: [],
  MutationObserver: ["constructor"]
};
const untaintedBasePrototype = {};
const isAngularZonePresent = () => {
  return !!globalThis.Zone;
};
function getUntaintedPrototype(key) {
  if (untaintedBasePrototype[key])
    return untaintedBasePrototype[key];
  const defaultObj = globalThis[key];
  const defaultPrototype = defaultObj.prototype;
  const accessorNames = key in testableAccessors ? testableAccessors[key] : void 0;
  const isUntaintedAccessors = Boolean(
    accessorNames && // @ts-expect-error 2345
    accessorNames.every(
      (accessor) => {
        var _a, _b;
        return Boolean(
          (_b = (_a = Object.getOwnPropertyDescriptor(defaultPrototype, accessor)) == null ? void 0 : _a.get) == null ? void 0 : _b.toString().includes("[native code]")
        );
      }
    )
  );
  const methodNames = key in testableMethods ? testableMethods[key] : void 0;
  const isUntaintedMethods = Boolean(
    methodNames && methodNames.every(
      // @ts-expect-error 2345
      (method) => {
        var _a;
        return typeof defaultPrototype[method] === "function" && ((_a = defaultPrototype[method]) == null ? void 0 : _a.toString().includes("[native code]"));
      }
    )
  );
  if (isUntaintedAccessors && isUntaintedMethods && !isAngularZonePresent()) {
    untaintedBasePrototype[key] = defaultObj.prototype;
    return defaultObj.prototype;
  }
  try {
    const iframeEl = document.createElement("iframe");
    document.body.appendChild(iframeEl);
    const win = iframeEl.contentWindow;
    if (!win) return defaultObj.prototype;
    const untaintedObject = win[key].prototype;
    document.body.removeChild(iframeEl);
    if (!untaintedObject) return defaultPrototype;
    return untaintedBasePrototype[key] = untaintedObject;
  } catch {
    return defaultPrototype;
  }
}
const untaintedAccessorCache = {};
function getUntaintedAccessor(key, instance, accessor) {
  var _a;
  const cacheKey = `${key}.${String(accessor)}`;
  if (untaintedAccessorCache[cacheKey])
    return untaintedAccessorCache[cacheKey].call(
      instance
    );
  const untaintedPrototype = getUntaintedPrototype(key);
  const untaintedAccessor = (_a = Object.getOwnPropertyDescriptor(
    untaintedPrototype,
    accessor
  )) == null ? void 0 : _a.get;
  if (!untaintedAccessor) return instance[accessor];
  untaintedAccessorCache[cacheKey] = untaintedAccessor;
  return untaintedAccessor.call(instance);
}
const untaintedMethodCache = {};
function getUntaintedMethod(key, instance, method) {
  const cacheKey = `${key}.${String(method)}`;
  if (untaintedMethodCache[cacheKey])
    return untaintedMethodCache[cacheKey].bind(
      instance
    );
  const untaintedPrototype = getUntaintedPrototype(key);
  const untaintedMethod = untaintedPrototype[method];
  if (typeof untaintedMethod !== "function") return instance[method];
  untaintedMethodCache[cacheKey] = untaintedMethod;
  return untaintedMethod.bind(instance);
}
function childNodes(n) {
  return getUntaintedAccessor("Node", n, "childNodes");
}
function parentNode(n) {
  return getUntaintedAccessor("Node", n, "parentNode");
}
function parentElement(n) {
  return getUntaintedAccessor("Node", n, "parentElement");
}
function textContent(n) {
  return getUntaintedAccessor("Node", n, "textContent");
}
function contains(n, other) {
  return getUntaintedMethod("Node", n, "contains")(other);
}
function getRootNode(n) {
  return getUntaintedMethod("Node", n, "getRootNode")();
}
function host(n) {
  if (!n || !("host" in n)) return null;
  return getUntaintedAccessor("ShadowRoot", n, "host");
}
function styleSheets(n) {
  return n.styleSheets;
}
function shadowRoot(n) {
  if (!n || !("shadowRoot" in n)) return null;
  return getUntaintedAccessor("Element", n, "shadowRoot");
}
function querySelector(n, selectors) {
  return getUntaintedAccessor("Element", n, "querySelector")(selectors);
}
function querySelectorAll(n, selectors) {
  return getUntaintedAccessor("Element", n, "querySelectorAll")(selectors);
}
function mutationObserverCtor() {
  return getUntaintedPrototype("MutationObserver").constructor;
}
function patch(source, name, replacement) {
  try {
    if (!(name in source)) {
      return () => {
      };
    }
    const original = source[name];
    const wrapped = replacement(original);
    if (typeof wrapped === "function") {
      wrapped.prototype = wrapped.prototype || {};
      Object.defineProperties(wrapped, {
        __rrweb_original__: {
          enumerable: false,
          value: original
        }
      });
    }
    source[name] = wrapped;
    return () => {
      source[name] = original;
    };
  } catch {
    return () => {
    };
  }
}
const index = {
  childNodes,
  parentNode,
  parentElement,
  textContent,
  contains,
  getRootNode,
  host,
  styleSheets,
  shadowRoot,
  querySelector,
  querySelectorAll,
  mutationObserver: mutationObserverCtor,
  patch
};
export {
  childNodes,
  contains,
  index as default,
  getRootNode,
  getUntaintedAccessor,
  getUntaintedMethod,
  getUntaintedPrototype,
  host,
  isAngularZonePresent,
  mutationObserverCtor,
  parentElement,
  parentNode,
  patch,
  querySelector,
  querySelectorAll,
  shadowRoot,
  styleSheets,
  textContent
};
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