Uncaught TypeError: undefined is not a promise

Question

I got error of Uncaught TypeError: undefined is not a promise

const p = Promise((resolve, reject) => {
  resolve('ok')
})

p.then(resp => console.log(resp))

what's wrong with above code?

user_1461131 · Answer

You need to instantiate the Promise.

In this case:

const p = new Promise((resolve, reject) => {
  resolve('ok')
})

p.then(resp => console.log(resp))