String.prototype.endsWith()

Baseline

20159

endsWith() String true false

const str1 = "Cats are the best!";

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

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

const str2 = "Is this a question?";

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

endsWith(searchString)
endsWith(searchString, endPosition)

searchString: str undefined endsWith() "undefined"
endPosition: searchString searchString +1 str.length

searchString true false

TypeError: searchString

endsWith()

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


ECMAScript 2027 LanguageSpecification # sec-string.prototype.endswith

String.prototype.endsWith (core-js)
es-shims String.prototype.endsWith
String.prototype.startsWith()
String.prototype.includes()
String.prototype.indexOf()
String.prototype.lastIndexOf()

MDN

MDN 2025822

GitHub

String
1. String()
1. length
Object/Function
1. __proto__
2. constructor