JS: String.prototype.substr

By Xah Lee. Date: . Last updated: .

str.substr(index, length)

Return a substring of length length, starting at index

console.log ( "abcd".substr(1,2) === "bc" ); // true
console.log ( "abcd".substr(1, 9) === "bcd" ); // true
// length longer than available, take to the end instead

JS substring

  1. JS: String.prototype.slice
  2. JS: String.prototype.substring
  3. JS: String.prototype.substr

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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