Can we add TS types for the validator params?

[gerarts]

Currently all validators accept any (through type ValidatorParam = any). Wouldn't it be better to strongly type all validator constructors?

We could even add a generic to Validator like:

export class Validator<P> extends EventTarget {
    constructor(param?: P, config?: import("../../types/validate").ValidatorConfig | undefined);
    __param: P;
    set param(arg: P);
    get param(): P;

    /* bunch of other stuff of course */
}

This would provide a better DX, and we might be able to remove some of the runtime checks (for example in string pattern), which are not implemented consistently in the current version (min- / max-string has no checks).

MinLength Validator has no runtime checks

Pattern Validator has runtime checks

[tlouisse]

Hey @gerarts, seems like a great improvement. Would you like to do a PR for this?