Question

Given an object:

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

How do I remove the property regex to end up with the following myObject?

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

Answer 1

To remove a property from an object (mutating the object), you can do it by using the delete keyword, like this:

delete myObject.regex; // or, delete myObject['regex']; // or, var prop = "regex"; delete myObject[prop]; 

Demo

var myObject = {   'ircEvent': 'PRIVMSG',   'method': 'newURI',   'regex': '^http://.*' }; delete myObject.regex;  console.log(myObject);

For anyone interested in reading more about it, Stack Overflow user kangax has written an incredibly in-depth blog post about the delete statement on their blog, Understanding delete. It is highly recommended.

If you’d like a new object with all the keys of the original except some, you could use destructuring.

Demo

let myObject = {   'ircEvent': 'PRIVMSG',   'method': 'newURI',   'regex': '^http://.*' };  // assign the key regex to the variable _ indicating it will be unused const { regex: _, ...newObj } = myObject;  console.log(newObj);   // has no 'regex' key console.log(myObject); // remains unchanged