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¿Cómo obtener el anterior al último elemento de una matriz en JavaScript?

Quiero obtener uno antes del último elemento de la matriz en JavaScript. pero en la consola, cuando uso este código " array.length -2 ", la dosis no funciona, y simplemente me devuelve la longitud de la matriz menos 2. y cuando uso este código " array.at[-2] " devuelve " indefinido"!

about 4 years ago · Juan Pablo Isaza
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const arr = [1,2,3,4,5,6] console.log(arr[arr.length -2]) //5
about 4 years ago · Juan Pablo Isaza Report
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