I came across this code not too long ago and had trouble finding the answer online, so I'm turning to you for help.
The specific code snippet is from a webpack configuration file:
const {
NODE_ENV = 'production',
} = process.env;
Appreciate any assistance!
Using default values in destructuring.
const { USERNAME } = process.env;
// is similar to:
const USERNAME = process.env.USERNAME
When combined:
const { USERNAME = 'guest' } = process.env;
// is similar (may involve more checks):
const USERNAME = process.env.USERNAME || 'guest'
For more information: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Destructuring_assignment
This illustrates the concept of assigning a default value to a variable. See the examples below for clarification.
const { name = "John" } = "Doe";
// name -> "John"
const { age = 30 } = { age: 25 };
// age -> 25
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