How different is React’s ES6 syntax when compared to ES5?

React’s ES6 syntax is significantly different from ES5 in terms of the way it defines classes and functions, and the use of arrow functions, modules, and template literals. Here are some key differences between the two:

1. Classes and functions: ES6 introduced a new syntax for defining classes, which is more concise and intuitive than the previous ES5 syntax. Classes can now be defined using the class keyword, and methods can be defined using arrow functions. In addition, ES6 also introduced arrow functions, which provide a more concise syntax for writing functions.

2. Modules: ES6 introduced a new module system that allows developers to split their code into smaller, reusable modules. This is different from the ES5 approach, which relied on global variables and functions.

3. Template literals: ES6 introduced template literals, which provide a more flexible way to interpolate variables into strings. This is more concise and readable than the ES5 approach, which used string concatenation.

4. Spread syntax: ES6 introduced the spread syntax, which allows arrays and objects to be spread into arguments or elements. This is useful for passing arguments to functions or concatenating arrays.

In summary, React’s ES6 syntax is more modern and intuitive than ES5, and provides developers with a more concise and flexible way to write code. While it may take some time to learn and get used to the new syntax, it ultimately leads to more efficient and maintainable code.