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ThaddeusJiang/JS-default-value-problem.md

Created May 9, 2019 09:40
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[easy buggy] JS default value just work for `undefined`
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JS-default-value-problem.md 
const {
    packageQuantity = 0,
    packageVolume,
  }: {
    packageQuantity: number,
    packageVolume: Object,
  } = batch;
  
// if batch = {
//    packageQuantity: null,
//    packageVolume: any,
//  }
// We can't get `0`.

use ||

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