js add key to object conditionally code example

Example 1: js conditional object property

const a = {
   ...(someCondition && {b: 5})
}

Example 2: js conditional object key

const object = {
  ...bool && { foo: 2 },
}

Example 3: conditionally add property to object ts

const a = {
   ...(someCondition && {b: 5})
}