String.prototype.endsWith()

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2015.

The endsWith() method of String values determines whether a string ends with the characters of this string, returning true or false as appropriate.

Try it

const str1 = "Cats are the best!";

console.log(str1.endsWith("best!"));
// Expected output: true

console.log(str1.endsWith("best", 17));
// Expected output: true

const str2 = "Is this a question?";

console.log(str2.endsWith("question"));
// Expected output: false

The characters to be searched for at the end of str. Cannot be a regex. All values that are not regexes are coerced to strings, so omitting it or passing undefined causes endsWith() to search for the string "undefined", which is rarely what you want.

endPosition Optional

The end position at which searchString is expected to be found (the index of searchString's last character plus 1). Defaults to str.length.

js
const str = "To be, or not to be, that is the question.";

console.log(str.endsWith("question.")); // true
console.log(str.endsWith("to be")); // false
console.log(str.endsWith("to be", 19)); // true