Javascript: .trim() usage

1

Hello friends,

I have a simple question, why this one works?

const palindromeChecker = (word) => {
	const testedWord = word.split("").reverse().join("");

	testedWord === word
		? console.log(`Tested word ${word} is a palindrome: ${testedWord}`)
		: console.log(` Tested word ${word} is not palindrome: ${testedWord}`);
};

palindromeChecker("mirim             ".trim());

And this doens’t ?

const palindromeChecker = (word) => {
	const testedWord = word.trim().split("").reverse().join("");

	testedWord === word
		? console.log(`Tested word ${word} is a palindrome: ${testedWord}`)
		: console.log(` Tested word ${word} is not palindrome: ${testedWord}`);
};

palindromeChecker("mirim             ");
3

Hello Lucas,

Thanks for the reply, I know what trim() does.

My question is why this work in my first function but not in my second.

4

because you are checking the original argument against the argument stripped of unwanted characters and reversed
for word you are missing the “stripped of unwanted characters” part

5

Ow now I see my mistake, thanks.