Answers for "how to check the last letter in the word is in the given array or not in js"

get last word in string js

function test(words) {
    var n = words.split(" ");
    return n[n.length - 1];
}

javascript get last word in string

// strips all punctuation and returns the last word of a string
// hyphens (-) aren't stripped, add the hyphen to the regex to strip it as well
function lastWord(words) {
    let n = words.replace(/[\[\]?.,\/#!$%\^&\*;:{}=\\|_~()]/g, "").split(" ");
    return n[n.length - 1];
}