variable deconstruction javascript code example
Example 1: Destructuring Assignment
const HIGH_TEMPERATURES = {
yesterday: 75,
today: 77,
tomorrow: 80
};
const {today, tomorrow} = HIGH_TEMPERATURES;
const today = HIGH_TEMPERATURES.today;
const tomorrow = HIGH_TEMPERATURES.tomorrow;
console.log(today);
console.log(tomorrow);
console.log(yesterday);
Example 2: Object destructuring
Object Destructuring =>
The destructuring assignment syntax is a JavaScript expression that makes it
possible to unpack values from arrays,
or properties from objects, into distinct variables.
example:
const user = {
id: 42,
is_verified: true
};
const {id, is_verified} = user;
console.log(id);
console.log(is_verified);
Example 3: javascript function destructuring
function f() {
return [1, 2];
}
let a, b;
[a, b] = f();
console.log(a);
console.log(b);
Example 4: js object destructuring
const { [propName]: identifier } = expression;