How Do I Delete a Property from a JavaScript Object?

Deleting a Property from a JavaScript Object

In JavaScript, objects are collections of key-value pairs. Deleting a property from an object removes the key-value pair associated with that property.

How to Delete a Property

There are several ways to delete a property from an object:

• Using delete keyword: The delete keyword removes the specified property from the object.

delete myObject.regex; // Remove "regex" property

• Using square brackets (ES3 ): You can also use square brackets to delete a property.

delete myObject['regex']; // Remove "regex" property

• Using a variable (ES6 ): You can store the property name in a variable and then use that variable to delete the property.

const prop = "regex";
delete myObject[prop]; // Remove "regex" property

Example

Given the following object:

const myObject = {
  ircEvent: "PRIVMSG",
  method: "newURI",
  regex: "^http://.*"
};

To remove the "regex" property and end up with the following object:

const myObject = {
  ircEvent: "PRIVMSG",
  method: "newURI"
};

You can use the following code:

delete myObject.regex;

console.log(myObject); // Outputs: {ircEvent: "PRIVMSG", method: "newURI"}

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