node.js - What is the "=>" syntax in nodejs? -

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• what's meaning of “=>” (an arrow formed equals & greater than) in javascript? 8 answers

i'm wondering difference between anonymous function:

callback = function (a) {return a} 

and using "=>" notation?

callback = (a) => {return a} 

is more syntactic sugar?

() => called arrow function of javascript, introduced in ecma script 6. it's useful more intuitive handling of current object context.

reference link new features of ecma script 6.