Method #charAt

www/js/_hyperscript-max.js:261–263

(offset = 1)

      return this.#source.charAt(this.#position + 1);
    }
    #charAt(offset = 1) {
      return this.#source.charAt(this.#position + offset);
    }
    #consumeChar() {
      this.#lastToken = this.#currentChar();
      this.#position++;