object destructuring javascript default value code example
Example 1: destructuring objects
({ a, b } = { a: 10, b: 20 });
console.log(a);
console.log(b);
({a, b, ...rest} = {a: 10, b: 20, c: 30, d: 40});
console.log(a);
console.log(b);
console.log(rest);
Example 2: destructuring assignment
Destructuring assignment is special syntax introduced in ES6,
for neatly assigning values taken directly from an object.
const user = { name: 'John Doe', age: 34 };
const { name, age } = user;
Example 3: js object destructuring with defaults
const { dogName = 'snickers' } = { dogName: undefined }
console.log(dogName)
const { dogName = 'snickers' } = { dogName: null }
console.log(dogName)
const { dogName = 'snickers' } = { dogName: false }
console.log(dogName)
const { dogName = 'snickers' } = { dogName: 0 }
console.log(dogName)
Example 4: object destructuring default value
let a, b;
[a=5, b=7] = [1];
console.log(a);
console.log(b);