All we need is an easy explanation of the problem, so here it is.
I have a project with React and next js. I use formik for handling my forms and Yup for validations
I have an input and I want perform some validations on it.
- this field must be required so if user don’t enter any information I show this message => Required
- this field should not contain any numbers otherwise I Show this message => Wrongggg
- this field must only contain Persian characters otherwise I Show this message => only Persian chars
this is my schema
Yup.string()
.required("Requiredddd")
.matches(!/\d/, 'Wrongggg'),
.matches(/^[\u0600-\u06FF\s]+$/, 'Only persian chars')
But in this case condition number 2 always Considered wrong.i think (!/\d/) is wrong but I haven’t any idea how can use matches function Negatively
How to solve :
I know you bored from this bug, So we are here to help you! Take a deep breath and look at the explanation of your problem. We have many solutions to this problem, But we recommend you to use the first method because it is tested & true method that will 100% work for you.
Method 1
According to yup you can use .matches
using this shape:
string.matches(regex: Regex, message?: string | function): Schema
. If you want to validate that the string doesn’t contain numbers, instead of using (!/\d/)
you should use /\D+$/
.
Yup.string()
.required("Requiredddd")
.matches(/\D+$/, 'Wrongggg')
.matches(/^[\u0600-\u06FF\s]+$/, 'Only persian chars')
See working example
Note: Use and implement method 1 because this method fully tested our system.
Thank you 🙂