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JavaScript DOM Scripting By Example Adding and Removing Names RSVP Checkbox

arif khan
arif khan
2,121 Points

to work with event object inside a handler we need to pass it then how come we are accessing variables defined outside?

const in = form.getElementById('input'); form.addEventListener('submit', (e)=>{ e.preventDefault(); //we can access coz we pass it to the event handeler function const text = in.value; //didnt pass cont variable in but accessible how?? })

1 Answer

Steven Parker
Steven Parker
231,248 Points

A function always has access to variables that exist in the execution context, in addition to those passed in as arguments.

At a minimum, the execution context includes all variables defined in the global scope (except for those that may be "shadowed" by inner scope variables of the same name).