Answer Posted / Kaushlendra Pratap

In ES5 (ES5 stands for ECMAScript 5), React components were typically written as JavaScript objects with a render method. They did not have class syntax or many other features that come with ES6 such as arrow functions, template literals, destructuring assignments, and the class syntax for components. In ES6, the introduction of classes made it easier to define components and their lifecycle methods in a more organized and OOP-like manner.

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