Use the delete keyword in JavaScript to remove a property from an object.

Beyond this goofy example here, you can actually do something with the delete keyword! At the TypeScript Playground I wrote this TypeScript:

var foo = {
   bar: 13,
   baz: "lucky",
   qux: true
}
console.log({ ...foo });
delete foo.baz;
console.log(foo);

 
 

...which got turned into this JavaScript...

"use strict";
var foo = {
   bar: 13,
   baz: "lucky",
   qux: true
};
console.log(Object.assign({}, foo));
delete foo.baz;
console.log(foo);

 
 

When you run this stuff two objects get logged to the console and you can clearly see the baz on the first object and not the second object. Yay!