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Discussion on: 5 Uses for the Spread Operator

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Florian Klampfer •

Missing my favourite use, which is to conditionally and declaratively add keys to objects, which isn't possible otherwise.

const obj = {
  a: 3,
  ...condition === true ? { b: 4 } : {},
}

Same for arrays

const plugins = [
  new BasicPlugin(),
  ...env === 'production' ? [new ProductionPlugin()] : [],
];