Crate vld_leptos 

vld-leptos — Leptos integration for the vld validation library

Shared validation for Leptos server functions and WASM clients. Define validation rules once, use them on both the server and the browser.

Zero dependency on leptos — works with any Leptos version (0.6, 0.7, 0.8+). Compatible with WASM and native targets.

Key Features

Feature	Description
validate_args!	Inline validation of server function arguments
validate / [validate_with]	Validate a serializable value against a schema
check_field	Single-field validation for reactive UI
check_all_fields	Multi-field validation returning per-field errors
VldServerError	Serializable error type for server→client error transport

Quick Example

// Shared validation rules (used on server AND client)
fn name_schema() -> vld::primitives::ZString { vld::string().min(2).max(50) }
fn email_schema() -> vld::primitives::ZString { vld::string().email() }

// Server function
#[server]
async fn create_user(name: String, email: String) -> Result<(), ServerFnError> {
    vld_leptos::validate_args! {
        name  => name_schema(),
        email => email_schema(),
    }.map_err(|e| ServerFnError::new(e.to_string()))?;
    // ... create user in database
    Ok(())
}

// Client component (reactive validation)
#[component]
fn CreateUserForm() -> impl IntoView {
    let (name, set_name) = signal(String::new());
    let name_err = Memo::new(move |_| {
        vld_leptos::check_field(&name.get(), &name_schema())
    });
    // ... render form with error display
}

Modules

prelude

Prelude — import everything you need.

Macros

validate_args

Validate server function arguments inline.

Structs

FieldError

A single field validation error.

VldServerError

Structured validation error for Leptos server functions.

Functions

check_all_fields

Validate all fields of a serializable struct against a vld schema type.

check_field

Check a single value against a schema, returning an error message if invalid.

check_field_all

Check a single value, returning all error messages (not just the first).

validate

Validate a serializable value against a vld schema type.

validate_value

Validate a serde_json::Value against a vld schema type.