JavaScript .delete()

Removes the entry associated with a given key from a Map object.

Syntax

The .delete() method accepts a key parameter and returns true if the deletion was successful. Otherwise, if the key does not exist, false is returned.

map.delete(key);

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Example

Data can be removed from a Map object using the .delete() method.

const fruits = new Map([
  ['Apples', 5],
  ['Oranges', 8],
]);

console.log(fruits.delete('Oranges')); // Output: true
console.log(fruits.delete('Strawberries')); // Output: false

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The first .delete() statement returns true because fruits contain an entry with Oranges as a key and has successfully removed it. The second statement returns false because an entry with the Strawberries key does not exist in fruits.

Codebyte Example

In the code below, a new Map of consumable construction supplies catalogs the current quantities on hand:

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