> how is it acceptable? Because developers feel that it is and have done so in past. Because things that required and unavailable have been put down in libraries that developers can import and utilize. Because there are many libraries that compete against each other to provide better interfaces for their users. Because they are used very widely and very successfully. Because it's simplicity has made it usable among the masses who may not have otherwise participated in content creation on the web if CS101 was a requirement. Because its benefits have outweighed its faults. Because when people suggest alternatives (Dart?) they realize that they need to make them compatible with JS because it is not only popular but also quite efficient now.