Inject Javascript to Proxy to set Debugging Config for Burp Suite | Example

gistfile1.txt

HTMLImageElement.prototype.__defineSetter__('src', function(val){debugger;});

 Object.defineProperty(Object.prototype, 
        'top', 
        {enumerable:false, set: function(value){ 
            if(parseInt(value)<0)debugger; 
        }}
    );