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. css - vertically align text
2. es6 iterators and iterables - creating custom iterators
3. position:absolute
4. Parse html response with fetch API
5. css : center element vertically and horizontally