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Now we can find many JavaScript frameworks on both client and server side such as jQuery,Node.js. Many of them utilize JavaScript's OOP feature to create powerful functions. JavaScript's OOP feature is not the same as Java and C# which are class based. And for some people, JavaScript's OOP feature is a bit hard to understand. We know, JavaScript was first used to enhance user interfaces and do form validations. I wonder whether the designers of JavaScript considered its OOP feature is so widely used in today's web. Do we need a new client-side language to replace JavaScript?