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In JavaScript, the method for passing the event object as the second argument to the callBack function is by using the function's parameter syntax.
For example, if you have an event listener function like:
function myEventHandler(event) {
// code to handle the event
}
When you attach the event listener to an HTML element, you can pass the event object as the second argument to the function like this:
element.addEventListener('click', myEventHandler);
The event object will then be passed as the first argument to the myEventHandler function when the 'click' event is triggered. This allows you to access properties and methods of the event object within the function.