JavaScript: String.prototype.includes

By Xah Lee. Date: . Last updated: .

New in JS2015.

str.includes(searchString)
Return true if str contains searchString. Else, return false.
str.includes(searchString , position)
Start search at position.
const ss = "abcd";

console.log(ss.includes("cd") === true);
console.log(ss.includes("cd", 3) === false);
console.log(ss.includes("x") === false);
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