JavaScript obtenga la diferencia de horas entre dos fechas
// date1 and date2 are date objects
let hours = Math.abs(date1 - date2) / 36e5;
// The subtraction returns the difference between the two dates in milliseconds.
// 36e5 is the scientific notation for 60*60*1000, dividing by which converts
// the milliseconds difference into hours.
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