zod to check if string is only whitespaces

how do i use zod to check if a string is only whitespaces?

9 Replies

nexxel•2y ago

const inputSchema = z.object({
  message: z
    .string()
    .min(1, { message: "Your message is empty!" })
    .max(100, { message: "Your message must be less than 100 characters." }),
});

const inputSchema = z.object({
  message: z
    .string()
    .min(1, { message: "Your message is empty!" })
    .max(100, { message: "Your message must be less than 100 characters." }),
});

this is what i have so far but i also want to throw an error if its only spaces

John•2y ago

I’m not sure what RegEx you need but Zod supports RegEx

Piotrek•2y ago

Yeah, I would use some kind of regex for that Found something like that on stack /\A\s*\z/ It's only for whitespaces

Develliot•2y ago

It think it's .refine that allows you to check regex iirc = /^\s+$/ you probably want to trim strings though

nexxel•2y ago

there's a .regex too so trim the string and then check if its empty? thanks i;ll try this

CaptainStarz•2y ago

You could also .preprocess strings and trim them and that would trigger min(1) rule if specific error message doesn’t matter

nexxel•2y ago

thanks works

Develliot•2y ago

Essentially remove all spaces at the beginning and end of the string to mitigate user error instead of validating against it. Usually its bad a11y to do magic like this when people are typing especially in the front end I feel this is OK to do and a bit more of a pleasant UX

nexxel•2y ago

noted thanks

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zod to check if string is only whitespaces