Solid-js-form NPM

solid-js-form

Form library for Solid.JS that uses yup as the validation schema

Installation

npm install solid-js-form

Usage

import { Component } from "solid-js";
import { render } from "solid-js/web";
import { useField, Form } from "solid-js-form";
import * as Yup from 'yup';

const Input: Component<{name:string, label:string}> = (props) => {
  const {field, form} = useField(props.name);
  const formHandler = form.formHandler;
  
  return (
    <>
      <label for={props.name}>
        {props.label}
        {field.required() ? " *" : ""}
      </label>
      <input
        name={props.name}
        value={field.value()}
        //@ts-ignore
        use:formHandler //still need to properly type the handler
      />
      <span>{field.error()}</span>
    </>
  );
};

const App:Component=()=>{
    return (
        <Form
          initialValues={{ username: "", password: "" }}
          validation={{
            username: Yup.string().required(),
            password: Yup.string().required(),
          }}
          onSubmit={async (form) => {console.log(form.values)}}
        >
              <Input name="username" label="Username"  />
              <Input name="password" label="Password"  />
              <button type="submit">Submit</button>
        </Form>
      );
}

render(() => <App />, document.getElementById("root"));

Alternative

import { Component, createMemo } from "solid-js";
import { render } from "solid-js/web";
import { Form } from "solid-js-form";
import * as Yup from "yup";

const App: Component = () => {
  return (
    <Form
      initialValues={{ username: "", password: "" }}
      validation={{
        username: Yup.string().required(),
        password: Yup.string().required(),
      }}
      onSubmit={async (form) => {
        console.log(form.values);
      }}
    >
      {(form) => {
        const formHandler = form.formHandler;
        const usernameError = createMemo(() =>
          form.errors.username && form.touched.username
            ? form.errors.username
            : ""
        );
        const passwordError = createMemo(() =>
          form.errors.password && form.touched.password
            ? form.errors.password
            : ""
        );
        return (
          <>
            <label>Username</label>
            <input 
                value={form.values.username}
                //@ts-ignore
                use:formHandler
            />
            <span>{usernameError()}</span>
            <br />
            <label>Passowrd</label>
            <input 
                value={form.values.password}
                //@ts-ignore
                use:formHandler 
            />
            <span>{passwordError()}</span>
            <br />
            <button type="submit">Submit</button>
          </>
        );
      }}
    </Form>
  );
};

render(() => <App />, document.getElementById("root"));

Api Reference

useField

useField<ValuesType = any>(name: keyof ValuesType): FormType.FieldHook<ValuesType> Custom hook that will expose the Form API and some Solid.JS Accessors to some field states.

setValue

<Field extends keyof ValuesType>(field: Field, value: ValuesType[Field]) => void Will set the value of the refered field

setError

(field: keyof ValuesType, error: string) => void Will set the error message of the refered field

setValues

(values: Partial<ValuesType>) => void Will set the value of the fields contained in the object provided

setErrors

(errors: Partial<Errors<ValuesType>>) => void Will set the error message of the fields listed in the object.

setTouched

((field: keyof ValuesType, touched: boolean) => void) | ((touched: Partial<Touched<ValuesType>>) => void) Will set the touched state of a single field when the field name is provided as first paramter. If the fisrt paramter is an object it will set the touched state of the fields listed in the object.

handleChange

(e: Event) => void Change event handler that can be passed to any input event listener so the form state will be handled only when that event is triggered

handleBlur

(e: Event) => void Blur event handler that can be passed to any input event listener so the form state will be handled only when that event is triggered

formHandler

(element: HTMLElement) => void Solid Directive that simplifies the form event handling. #NOTE: The formHandler is not recognized by JSX TypeScript and so dar requires the use of //@ts-ignore