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addEventListener('evento', devolución de llamada) vs addEventListener('evento', función() { devolución de llamada() })

Me pregunto si hay una diferencia entre...

 document.addEventListener('DOMContentLoaded', function() { callback() });

y

 document.addEventListener('DOMContentLoaded', callback);

He visto código como este, y tengo curiosidad por saber por qué pusieron la función dentro de una función anónima.

 var on_load = function(f) { if (document.body === null) document.addEventListener('DOMContentLoaded', function() { f() }, false) else f() }
about 4 years ago · Juan Pablo Isaza
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