toLowerCase implementation

['A', 'B', 'C'].map(element => {
    let result;
    if (element === 'A') {
        result = 'a';
    }
    if (element === 'B') {
        result = 'b';
    }
    if (element === 'C') {
        result = 'c';
    }
    if (element === 'D') {
        result = 'd';
    }
    if (element === 'E') {
        result = 'e';
    }
    if (element === 'F') {
        result = 'f';
    }
    if (element === 'G') {
        result = 'g';
    }
    if (element === 'H') {
        result = 'h';
    }
    if (element === 'I') {
        result = 'i';
    }
    if (element === 'J') {
        result = 'j';
    }
    if (element === 'K') {
        result = 'k';
    }
    if (element === 'L') {
        result = 'l';
    }
    if (element === 'M') {
        result = 'm';
    }
    if (element === 'N') {
        result = 'n';
    }
    if (element === 'O') {
        result = 'o';
    }
    if (element === 'P') {
        result = 'p';
    }
    if (element === 'Q') {
        result = 'q';
    }
    if (element === 'R') {
        result = 'r';
    }
    if (element === 'S') {
        result = 's';
    }
    if (element === 'T') {
        result = 't';
    }
    if (element === 'U') {
        result = 'u';
    }
    if (element === 'V') {
        result = 'v';
    }
    if (element === 'W') {
        result = 'w';
    }
    if (element === 'X') {
        result = 'x';
    }
    if (element === 'Y') {
        result = 'y';
    }
    if (element === 'Z') {
        result = 'z';
    }
    return result;
});

Thank you for your inputs. After many researches, I think this is the React Way:tm: to do this.

I ran this through the Dankometer and it came out moist. You are skills.

Thank you for your feedback. I have another attempt:

(function() {
    var letters = ['A', 'B', 'C'];

    var nextarray = [];
    var i;
    for (i = 0; i < letters.length; i++) {
        var result;
        var element = letters[i];
        if (element === 'A') {
            result = 'a';
        }
        if (element === 'B') {
            result = 'b';
        }
        if (element === 'C') {
            result = 'c';
        }
        if (element === 'D') {
            result = 'd';
        }
        if (element === 'E') {
            result = 'e';
        }
        if (element === 'F') {
            result = 'f';
        }
        if (element === 'G') {
            result = 'g';
        }
        if (element === 'H') {
            result = 'h';
        }
        if (element === 'I') {
            result = 'i';
        }
        if (element === 'J') {
            result = 'j';
        }
        if (element === 'K') {
            result = 'k';
        }
        if (element === 'L') {
            result = 'l';
        }
        if (element === 'M') {
            result = 'm';
        }
        if (element === 'N') {
            result = 'n';
        }
        if (element === 'O') {
            result = 'o';
        }
        if (element === 'P') {
            result = 'p';
        }
        if (element === 'Q') {
            result = 'q';
        }
        if (element === 'R') {
            result = 'r';
        }
        if (element === 'S') {
            result = 's';
        }
        if (element === 'T') {
            result = 't';
        }
        if (element === 'U') {
            result = 'u';
        }
        if (element === 'V') {
            result = 'v';
        }
        if (element === 'W') {
            result = 'w';
        }
        if (element === 'X') {
            result = 'x';
        }
        if (element === 'Y') {
            result = 'y';
        }
        if (element === 'Z') {
            result = 'z';
        }
        nextarray.push(result);
    }
    return nextarray;
})();

Dat IIFE and for loop though

Back to the good old days when people wrote proper code. Make JavaScript great again 🙌