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How to iterate through a map in JavaScript?

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Sometimes, we want to iterate through a map in JavaScript.

In this article, we’ll look at how to iterate through a map in JavaScript.

How to iterate through a map in JavaScript?

To iterate through a map in JavaScript, we can use a for-of loop.

For instance, we write

const myMap = new Map();
myMap.set("0", "foo");
myMap.set(1, "bar");
myMap.set({}, "baz");

for (const [key, value] of myMap.entries()) {
  console.log(key, value);
}

to create a map with the Map constructor.

Then we call set to add the key and value of a map entry.

Next, we use the entries method to return an array with arrays of key-value pairs in myMap.

And then we use a for-of loop to loop through each entry.

key is the key of the entry and value is the value.

Conclusion

To iterate through a map in JavaScript, we can use a for-of loop.

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