JS: String.prototype.startsWith

By Xah Lee. Date: . Last updated: .

New in ES2015.

str.startsWith ( searchString )

str.startsWith ( searchString, position )

Return true if str starts with searchString from position. Else, return false.

By default, position is 0.

const ss = "abcd";

console.log ( ss.startsWith("ab") ); // true
console.log ( ss.startsWith("b") );  // false

console.log ( ss.startsWith("b", 1) ); // true

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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