WombatInit

Override navigator.sendBeacon so that the url argument to the original function can be rewritten

Override document.cookie by adding getter and setter methods in order to rewrite the cookie such that it is valid for replay. Ensures

• the path is the original path not the replay path
• the domain is the original domain not the replay domain
• the expires datetime is the replay expires datetime

Override document.createElementNS to rewrite namespaceURI argument provided to the function to be the original namespaceURI not replay affected namespaceURI

Override Crypto.getRandomValues to produce pseudo-random numbers that would imitate the ones produced at preservation time

Override the Date constructor and Date.now to return Date objects that are at the DateTime of the replaying page

disable Notifications and the ability to set or watch the current position via geoloaction

Override eval and ensure that if the string being evaluated contains location it is rewritten to WB_wombat_location

Override fetch to rewrite the URL

Adds WB_wombat_frameElement to Object.prototype

• if this.$wbwindow.__WB_replay_top === this.$wbwindow then define the property frameElement on $wbwindow with {value: undefined, configurable: false}

Override Element.getAttribute.

• if the attribute being gotten is one of the rewritten attributes for a particular element extract the original value and return it.
• otherwise return the value of the attribute as is.

Add event listeners for message and hashchange so that Wombat can inform __WB_top_frame about hash changes

Override the window.Element.insertAdjacentHTML to rewrite the text argument of the original function

Add getters for MessageEvent attributes target,srcElement,currentTarget,eventPhase,path and marks the MessageEvents prototype as __extended

Override window.{postMessage,addEventListener,removeEventListener}

• postMessage: override adds replay routing handling so that page being replayed in the iframe can communicate with its own (i)frames not the actual top or Wombat can make requests to the actual top if the message being sent requires it
• addEventListener: if the type is message wrap the original listener in WrappedListener and add it to an internal mapping of wrapped listeners otherwise add the original listener
• removeEventListener: if the listener to be removed was wrapped remove the wrapped listener otherwise remove the original listener

Add __WB_pmw to the given windows Object prototype

Overrides the navigator.registerProtocolHandler so that the URI argument to the original function is rewritten

Seed Math.random with a number that would imitate the pseudo-random numbers generated at preservation time

Override ServiceWorkerContainer.register in order to

• rewrite the URL of the ServiceWorker being registered
• if the scope of the service worker is being set rewrite it as well

Overrider Element.setAttribute.

• if the attribute being set equals one of the attributes to be rewritten, rewrite it
• otherwise the Elements attribute is set to the original value

Override the Web Worker constructor to

• remove postMessage rewrites that are invalid given a worker context if the URL is a Blob URL
• request the Workers JS file from the archive

Add WB_wombat_top property getter/setter to Object.prototype getter:

• if the __WB_replay_top property is on the Object return __WB_replay_top
• if the __WB_replay_top property is on the Window object return the Window object
• otherwise return the original top setter: set the top property to value

Add an MessageEvent getter for the supplied attribute

• if the attribute does not have an original getter does not add a new one