ES6 – Rest parameter

Hi, the rest parameter syntax is “…” and is an Array type, the rest parameter contains the rest of the parameters of a function when number of arguments exceeds the number of named parameters.

Here an example of how use the rest parameter:

// myFunction that receive multiple arguments
const myFunction = (a, b, c, ...args) => { // rest parameter
  console.log("args --->", args);
};

// Calling myFunction and passing multiple parameters
myFunction(100, 200, 300, 400, 500, 600, 700);

Result:

Ok, maybe you are asking yourself: “…” is called Spread Operator or Rest parameter? well, is called as Spread operator or rest parameter depending on where and how it’s used.

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By Cristina Rojas.