find the length of a map in javascript

To find the length of a Map in JavaScript, we can use the size property. The size property returns the number of key-value pairs in the Map object. Here's an example:

index.tsx
const map = new Map();
map.set(1, 'one');
map.set(2, 'two');
map.set(3, 'three');

console.log(map.size); // output: 3
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In the example above, we first create a new Map object and add three key-value pairs to it. Then we use the size property to get the number of key-value pairs in the Map object, which is 3 in this case.