Method addGrammarElement

www/js/_hyperscript.js:1554–1559

(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;