Default function parameters

The default function parameters in ES6, gives us the ability to initialize the function arguments with default values in case if they are undefined. For example,

function mult(a, b) {
  b = typeof b !== 'undefined' ?  b : 1;
  return a*b;
}
mult(5); // 5

function multiply(a, b = 1) {
  return a*b;
}
mult(5); // 5

Also Read:

1. Error: can not find module 'underscore'
2. css - align text to an image vertically
3. Progressive enhancement vs Graceful degradation
4. Array filterUntil function implementation for javascript
5. Using es6 modules with simple examples