Javascript Tip #6 - Rest parameters

js-tip6.js

/* Tweet: https://twitter.com/AnsonH_/status/1439546876718551049?s=20 */

/* First photo */ 
function myFunc(a, b, ...args) {
  // Remaining arguments are stored in `args` array
  console.log("a: ", a);
  console.log("b: ", b);
  console.log("args: ", args); // This is an array!
}

myFunc(1, 2, 3, 4, 5, 6);
// a:  1
// b:  2
// args:  [ 3, 4, 5, 6 ]


/* Second photo */ 

function foo(arg1, arg2, ...restArgs) {}  // Correct

function foo(...args);  // Correct

function foo(arg1, ...restArgs, arg2) {}  // WRONG!

function foo(arg1, ...restArgs, ...moreArgs) {}  // WRONG!

Extra links:

• MDN documentation