Method set

packages/react-native/src/polyfills/dom.ts:47–49

(name: string, value: string)

      return this._map[name.toLowerCase()] ?? null;
    }
    set(name: string, value: string): void {
      this._map[name.toLowerCase()] = value;
    }
    has(name: string): boolean {
      return name.toLowerCase() in this._map;
    }