- what is the meaning of “async” or “defer” attributes on a script element?
- does “async” script delay page rendering?
- How would you write a script to know how many times the window.addEventListener was called?
A: override the original function
- How would you know if a script/function was overridden?
- How would you bypass detection of overridden native functions?
- How would you pass information from client to server - A: make a connection (xhr, websocket, image/script elements src attributes, background-image css rules, etc…)
What is CSP?
A: content security policy

Question

- what is the meaning of “async” or “defer” attributes on a script element?
- does “async” script delay page rendering?
- How would you write a script to know how many times the window.addEventListener was called?
A: override the original function
- How would you know if a script/function was overridden? 
- How would you bypass detection of overridden native functions?
- How would you pass information from client to server - A: make a connection (xhr, websocket, image/script elements src attributes, background-image css rules, etc…)
What is CSP?
A: content security policy

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