Chrome Developer Tools
Open
Three dots > More tools > Developer tools: 
Analyze the network
Network > All: 
Analyze the JavaScript (in pretty mode)
Network > JS > Select file > Right click : Open in Source panel 
Ugly view: 
Pretty print: Click {}: 
Pretty print view, nicer format: 
Intercepting specific target
- Target > Site Map > double click the Filter option to see the filter.

Target > Scope > Use advanced scope control, protocol: Any + Host:


Proxy > Option > Intercept Client Request (& Server Response) that matches the target:

Also exclude SVG:
