Method #isNumeric

www/js/_hyperscript.esm.js:220–222

(c)

    return c >= "a" && c <= "z" || c >= "A" && c <= "Z";
  }
  #isNumeric(c) {
    return c >= "0" && c <= "9";
  }
  #isWhitespace(c) {
    return c === " " || c === "	" || c === "\r" || c === "\n";
  }