Method addTopExpression

www/js/_hyperscript.js:1664–1667

(name, definition)

      this.addGrammarElement(name, definition);
    }
    addTopExpression(name, definition) {
      this.#topExpressions.push(name);
      this.addGrammarElement(name, definition);
    }
    commandStart(token) {
      return this.#commands[token.value || ""];
    }