Basta ya de investigar por otras páginas porque llegaste al espacio indicado, tenemos la solución que buscas sin liarte.
Ejemplo 1: javascript get age
functiongetAge(dateString)Ejemplo 2: javascript calcula la edad desde la fecha de nacimiento
// To calculate age:var year_born =prompt("Please enter your date of birth:","Type here");var d =newDate();var n = d.getFullYear();functiongetAge(birthYear)var currentDate =newDate();var currentYear = currentDate.getFullYear();
age = currentYear - birthYear;return age;
calculatedAge =getAge(year_born);alert("Hello, "+"you are "+ calculatedAge +" years old!");Ejemplo 3: calculadora de edad javascript
functioncalculate_age(dob)var diff_ms =Date.now()- dob.getTime();var age_dt =newDate(diff_ms);returnMath.abs(age_dt.getUTCFullYear()-1970);console.log(calculate_age(newDate(1982,11,4)));console.log(calculate_age(newDate(1962,1,1)));Ejemplo 4: cómo codificar una función de verificación de edad en javascript
functionPerson(dob)// [1] new Date(dateString)this.birthday=newDate(dob);// transform birthday in date-objectthis.calculateAge=function()// diff = now (in ms) - birthday (in ms)// diff = age in msconst diff =Date.now()-this.birthday.getTime();// [2] new Date(value); -> value = ms since 1970// = do as if person was born in 1970// this works cause we are interested in age, not a yearconst ageDate =newDate(diff);// check: 1989 = 1970 + 19console.log(ageDate.getUTCFullYear());// 1989// age = year if person was born in 1970 (= 1989) - 1970 = 19returnMath.abs(ageDate.getUTCFullYear()-1970);;var age =newPerson('2000-1-1').calculateAge();console.log(age);// 19Ejemplo 5: JavaScript calcular la edad
calculate Age using JavascriptEjemplo 6: calculadora de edad javascript
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