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Cómo modificar cadenas en la matriz js

Se suponía que debía poner en mayúscula los primeros caracteres de cada cadena, pero no es así. Por favor, dígame cómo puedo resolver este problema.

 let array = ["string1", "string2", "string3", "string4"]; let btn = document.getElementById("btn"); array.forEach(function (item) { item.charAt(0).toUpperCase(); }) btn.addEventListener("click", function () { document.getElementById("p").innerHTML = array.join(" ") })```
about 4 years ago · Juan Pablo Isaza
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Obtiene la primera letra y la convierte a mayúscula, pero no hace nada con ella.

Debe concatenar el resto de la cadena al primer carácter y luego reasignarlo.

 let array = ["string1", "string2", "string3", "string4"]; array.forEach(function(item, i) { array[i] = item.charAt(0).toUpperCase() + item.substring(1) }) console.log(array.join(" "))

about 4 years ago · Juan Pablo Isaza Report
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