Method addGrammarElement

www/js/_hyperscript.esm.js:1552–1557

(name, definition)

    }
  }
  addGrammarElement(name, definition) {
    if (this.#grammar[name]) {
      throw new Error(`Grammar element '${name}' already exists`);
    }
    this.#grammar[name] = definition;
  }
  addCommand(keyword, definition) {
    var commandGrammarType = keyword + "Command";
    this.#grammar[commandGrammarType] = definition;