Method _nonBasicCodePointIndex

src/Encoder/Punycode.js:132–134

* Returns the first non-basic code point, if any. * @param {number[]} codePoints Code points * @return {number} Index of first non-basic code point or -1, if the code * points are all basic.

(codePoints)

   * points are all basic.
   */
  _nonBasicCodePointIndex (codePoints) {
    return codePoints.findIndex(codePoint => codePoint >= 0x80)
  }
}