Handling undefined properties by defaulting to an empty array in ES6

In the code snippet below, I am attempting to extract barNames from an object named bar:

const {[id]: {'name': fooName} = []} = foo || {};
const {'keywords': {[fooName]: barNames}} = bar || [];
  • Please note that although fooName exists, it is not present as a property within keywords

My goal is to assign an empty array to barNames if fooName does not exist in bar.keywords. I have tried using the OR operator without success. I am looking for alternative solutions that do not involve additional ternary operators like ?, :, &&, etc.

Any tips or hints would be greatly appreciated.

javascriptecmascript-6

Answer №1

It seems like you're in need of a default initializer:

const {[id]: {'name': fooName}} = foo || {};
const {'keywords': {[fooName]: barNames = []}} = bar || {};
//                                      ^^^^

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