JS: String.prototype.includes

By Xah Lee. Date: . Last updated: .

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

JS String

  1. String Overview
  2. Template String ⭐
  3. Char, Code Unit, Codepoint
  4. String Escape Sequence
  5. Unicode Escape Sequence
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