Page Graph

Chrome extension to generate interactive page dependency graphs.

The above shows the graph obtained from the IMDb home page. Live demo here.

Description

This PoC exploits the initiator field of the Network.requestWillBeSent event exposed by the Chrome Debugging Protocol to build a dependency graph of the objects loaded by a tab during a certain time interval.

Each node represents an HTTP object and it is thus identified by its URL. The color of the nodes denotes the object type: image, style sheet, etc.

Arrows can be interpreted as has been loaded by relationship, and multiple arrows means that all the targets are responsible of the loading of the source node (i.e., each element of the AJAX stack trace).

When the same URL is requested more than once a placeholder (empty) node is added and all the instances are linked back to it by dashed lines. In this case, only the placeholder node can be the target of a relationship.

Setup

1. Install the dependencies locally:

    cd bundle
    npm install
    npm run bundle
   

2. Navigate to chrome://extensions, make sure that "Developer mode" is enabled, click "Load unpacked extension..." and select the extension folder,

Usage

Click on the extension button and follow the instructions.

Graphs can be saved as standalone HTML files.