why the env can't be a enum type contains all items of list, and how?
const { hostname, pathname } = window.location
const rootDir = pathname.split('/')[1]
const list = ['newstage', 'stage', 'qa3', 'qa2', 't1', 'sit', 'dev']
const env = list.find(el => rootDir === el)
now env is const env: string, what I want is
const env: "stage" | "qa3" | "qa2" | "t1" | "sit" | "dev"
CodePudding user response：
Try use const assertions:
no literal types in that expression should be widened (e.g. no going from "hello" to string)
const rootDir = 'qa3';
const list = ['newstage', 'stage', 'qa3', 'qa2', 't1', 'sit', 'dev'] as const;
const item = list.find(el => rootDir === el)