如何使用 js 擴展 prototype 方法

expand prototype

function enhancedLog(msg = ``) {
  // this.msg = msg;
  enhancedLog.msg = msg;
  console.log(`msg =`, msg);
}

// ✅
enhancedLog.__proto__.emoji = function() {
   console.log(`🚀 msg =`, this.msg, enhancedLog.msg);
}

enhancedLog.__proto__;
// ƒ () { [native code] }

 // ❌
enhancedLog.prototytpe.emoji = function() {
   console.log(`🚀 msg =`, this.msg);
}
// VM350:1 Uncaught TypeError: Cannot set property 'emoji' of undefined

enhancedLog.prototytpe
// undefined

enhancedLog(`👻🇨🇳🎉`);
enhancedLog.emoji();

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