Get an element from a Map using JavaScript

You can use the get() method to get an element from a Map object in JavaScript. The get() method takes the element key as input and returns the value associated with the specified key, or undefined if the key is not found in the Map object.

const map = new Map()

map.set('name', 'John Doe')
map.set('age', 29)
map.set('job', 'UX Designer')

console.log(map.get('name')) // John Doe
console.log(map.get('age')) // 29
console.log(map.get('job')) // UX Designer

console.log(map.get('address')) // undefined

If the value associated with the specified key is an object, the get() method will return a reference to that object. Any subsequent changes made to that object will also reflect inside the Map object:

const product = { name: 'Milk', qty: 2 }
const prices = [2.99]

const items = new Map()
items.set('product', product)
items.set('prices', prices)

items.get('product').qty = 100

// { name: 'Milk', qty: 100 }

// [ 2.99, 4.55 ]

Read this article to learn more about the Map object and how to create collections of key-value pairs in JavaScript.

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