Method addFeature

www/js/_hyperscript.esm.js:1586–1590

(keyword, definition)

    }
  }
  addFeature(keyword, definition) {
    var featureGrammarType = keyword + "Feature";
    this.#grammar[featureGrammarType] = definition;
    this.#features[keyword] = definition;
  }
  /**
   * Register a parse element class based on its static metadata.
   * Commands need `static keyword`, expressions need `static grammarName`.