find the value associated with a key in a map in javascript

To find the value associated with a key in a map in JavaScript, you can simply use the get() method of the Map object. Here is an example:

index.tsx
const myMap = new Map();
myMap.set('foo', 'bar');
myMap.set('baz', 'qux');

const value1 = myMap.get('foo'); // returns 'bar'
const value2 = myMap.get('baz'); // returns 'qux'
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In this example, we create a new Map object called myMap, and add two key-value pairs to it using the set() method. To retrieve the value associated with a key, we can use the get() method and pass in the desired key as an argument. The method will return the corresponding value, or undefined if the key doesn't exist.

Note that Map is a built-in object introduced in ECMAScript 2015, so it may not be available in older browsers.