Estoy tratando de repetir el aviso cuando el usuario ingresa una entrada incorrecta. Busqué en Google e hice clic en casi todos los enlaces principales, probé while loop y for loop y simplemente no llegué a ninguna parte. Cuando uso el método que encontré de un bucle, ya no se puede hacer clic en mi botón o hace clic, pero cuando ingreso un mes no válido, no aparece ninguna alerta y no se repite. si alguien me puede señalar en la dirección correcta, o mostrarme lo que estoy haciendo mal, ¡lo agradecería mucho!
function myFunction() { let text; let month = prompt("What month would you like to know about?","Please type your answer here").toLowerCase(); switch(month) { case "january": text = "There are 31 days in the month of January"; break; case "february": text = "There are 28 days in the month of february, and 29 days on a leap year!"; break; case "march": text = "There are 31 days in the month of March"; break; case "april": text = "There are 30 days in the month of April"; break; case "may": text = "There are 31 days in the month of May"; break; case "june": text = "There are 30 days in the month of June"; break; case "july": text = "There are 31 days in the month of July"; break; case "august": text = "There are 31 days in the month of August"; break; case "september": text = "There are 30 days in the month of September"; break; case "october": text = "There are 31 days in the month of October"; break; case "november": text = "There are 30 days in the month of November"; break; case "december": text = "There are 31 days in the month of December"; break; } document.getElementById("days").innerHTML = text; }en las declaraciones de cambio, puede establecer una condición default , que se ejecuta cuando ninguno de los casos proporcionados coincide con la condición. en su caso, puede llamar a myFunction dentro del caso predeterminado para "bucle".
por supuesto, esto no solicitará un aviso nuevamente cuando el usuario proporcione un mes válido.
function myFunction() { let text = null; let month = prompt("What month would you like to know about?", "Please type your answer here").toLowerCase(); switch (month) { case "january": text = "There are 31 days in the month of January"; break; // fill all your cases default: text = "Incorrect input"; alert('Incorrect input, attempting prompt again'); myFunction(); } if (text) document.getElementById("days").innerHTML = text; // myFunction(); uncomment this if you want the loop to go on even when the user provides a valid month as input }Puedes intentar algo como esto
const regularMonthConfig = { january: 31, march: 31, april: 30, may: 31, june: 30, july: 31, august: 31, september: 30, october: 31, november: 30, december: 31 } const february = 'There are 28 days in the month of february, and 29 days on a leap year!' const otherMonths = Object.fromEntries(Object.entries(regularMonthConfig).map(([month, days]) => [month, `There are ${days} days in the month of ${month}`])) const configMonths = { february, ...otherMonths } const ask = () => { let month = prompt("What month would you like to know about?", "Please type your answer here").toLowerCase(); const response = configMonths[month.toLowerCase()]|| "invalid month retry" document.getElementById("days").innerHTML = response; } ask() <div id="days"></div>