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TTCTheo's Typesafe Cult
Created by utdev on 1/22/2024 in #questions
Check for string to not be empty?
If you want to allow empty strings to pass on this verification you can use a logic like that: 
if (
  !gender && gender !== "" ||
  !firstname && firstname !== ""||
  !lastname && lastname !== ""
....
)
if (
  !gender && gender !== "" ||
  !firstname && firstname !== ""||
  !lastname && lastname !== ""
....
)
7 replies
TTCTheo's Typesafe Cult
Created by utdev on 1/22/2024 in #questions
Check for string to not be empty?
Hello, one way to improve your code is check for falsy values using the ! operator For example, instead of checking if theses values are null or undefined like this: 
if (
  gender === undefined ||
  gender === null ||
  firstname === undefined ||
  firstname === null ||
  lastname === undefined ||
  lastname === null ||
)
if (
  gender === undefined ||
  gender === null ||
  firstname === undefined ||
  firstname === null ||
  lastname === undefined ||
  lastname === null ||
)
You can check if the value is falsy with the ! operator: 
if (
  !gender ||
  !firstname ||
  !lastname
)
if (
  !gender ||
  !firstname ||
  !lastname
)
Have a quick look about checking for falsy values in Javascript on this article: https://www.freecodecamp.org/news/falsy-values-in-javascript/
7 replies
TTCTheo's Typesafe Cult
Created by ForcedToCode on 1/20/2024 in #questions
Typescript ExpressJS middleware for jwt auth
There is another way to do this that is recommended by the express using the res.locals. Link to docs: https://expressjs.com/en/api.html#res.locals Basically, instead of using: 
req.user = user
req.user = user
You, use: 
res.locals.user = user
res.locals.user = user
The typescript will not complain because the res.locals are made to accept any content.
3 replies
TTCTheo's Typesafe Cult
Created by ForcedToCode on 1/20/2024 in #questions
Typescript ExpressJS middleware for jwt auth
Hello, you could create a type definition file to include the user property on the express Request. Example: Create an express.d.ts file in your project, this file could be located in a types folder or anywhere you want to inside src, with this content: 
declare namespace Express {
  export interface Request {
    user: string | jwt.JwtPayload
  }
}
declare namespace Express {
  export interface Request {
    user: string | jwt.JwtPayload
  }
}
Doing this everywhere that you call the express request you will be able to use request.user. The bad side of this is if you try to access request.user in a route that does not have the verifyToken middleware you will get an runtime error, because the middleware is the one who saves the user value on the request.
3 replies