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What is a better way to write this in JS

let foo
  if(bar) foo = bar.value

I am trying to avoid react error when bar is null if i use const foo = bar.value.

Mohamed Daher
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    https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Optional_chaining – Dennis Vash Apr 08 '21 at 17:47
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    Does this answer your question? [Set a variable if undefined in JavaScript](https://stackoverflow.com/questions/5409641/set-a-variable-if-undefined-in-javascript) – wentjun Apr 08 '21 at 17:50
  • Also yes. I was looking for Optional chainning as answered by YohaiM – Mohamed Daher Apr 08 '21 at 19:03

2 Answers2

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You can use optional chaining, look at: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Optional_chaining

const foo = bar?.value
YohaiM
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Try to use the chaining operator if your node version is recent enough.

const foo = bar?.value

Or the and operator to take the value of bar if bar isn't falsy.

const foo = bar && bar.value
ations
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