JS: String.prototype.includes

By Xah Lee. Date: 2017-02-17. Last updated: 2019-05-20.

New in ES2015.

str.includes ( searchString )

str.includes ( searchString , position )

Return true if str contains searchString, starting search at position. If omitted, it's 0. Else, return false.

const g = "abcd";

console.log ( g.includes("cd") ); // true
console.log ( g.includes("cd", 3) ); // false

console.log ( g.includes("x") ); // false

Liket it? I spend 2 years writing this tutorial. Help me spread it. Tell your friends. Or, Put $5 at patreon.

Or, Buy JavaScript in Depth

If you have a question, put $5 at patreon and message me.