Remove properties from objects (JavaScript)

Question

Say I create an object as follows:

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

How should I remove the property regex to end up with new myObject as follows?

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

Answer 1

To remove a property from an object (mutating the object), you can do it 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://.*" };  const {regex, ...newObj} = myObject;  console.log(newObj);   // has no 'regex' key console.log(myObject); // remains unchanged