@codecn/inertia-field-input

An opinionated form input component library for Laravel + Inertia.js + React + shadcn/ui projects.

Installation

npm install @codecn/inertia-field-input

Components

This package provides a set of form components that integrate seamlessly with Laravel's Inertia.js and shadcn/ui.

FormInput

A text input component that integrates with Inertia.js forms.

import { FormInput } from "@codecn/inertia-field-input";

// Basic usage
<FormInput
  id="name"
  value={form.data.name}
  onChange={(e) => form.setData("name", e.target.value)}
  error={form.errors.name}
  label="Name"
/>;

// With useField hook - automatically handles errors from Laravel validation
<FormInput label="Name" {...useField("name")} required autoComplete="name" placeholder="Full name" />;

// Email input example
<FormInput
  type="email"
  label="Email"
  {...useField("email")}
  required
  autoComplete="username"
  placeholder="Email address"
/>;

// Using a custom input component
// First, create your custom input component in your project
// src/components/ui/CustomInput.tsx
const CustomInput = React.forwardRef<HTMLInputElement, React.InputHTMLAttributes<HTMLInputElement>>((props, ref) => (
  <input ref={ref} {...props} className="custom-input-class" />
));

// Then, create your own FormInput that extends the package's FormInput
// src/components/FormInput.tsx
import { FormInput as BaseFormInput } from "@codecn/inertia-field-input";
import { CustomInput } from "./ui/CustomInput";

export const FormInput = (props: React.ComponentProps<typeof BaseFormInput>) => (
  <BaseFormInput {...props} InputComponent={CustomInput} />
);

// Now you can use your custom FormInput throughout your application
import { FormInput } from "@/components/FormInput";

<FormInput label="Custom Input" {...useField("custom")} />;

FormSelect

A select dropdown component for single selection.

import { FormSelect, useField } from "@codecn/inertia-field-input";

const options = [
  { label: "Option 1", value: "1" },
  { label: "Option 2", value: "2" },
];

// Basic usage
<FormSelect
  id="category"
  value={form.data.category}
  onChange={(value) => form.setData("category", value)}
  options={options}
  error={form.errors.category}
  label="Category"
/>;

// With useField hook - automatically handles errors from Laravel validation
<FormSelect label="Category" {...useField("category")} options={options} required />;

FormCheckbox

A checkbox component for boolean values.

import { FormCheckbox, useField } from "@codecn/inertia-field-input";

// Basic usage
<FormCheckbox
  id="terms"
  checked={form.data.terms}
  onChange={(checked) => form.setData("terms", checked)}
  error={form.errors.terms}
  label="I agree to the terms"
/>;

// With useField hook - automatically handles errors from Laravel validation
<FormCheckbox label="I agree to the terms" {...useField("terms")} required />;

FormDate

A date picker component with calendar integration.

import { FormDate, useField } from "@codecn/inertia-field-input";

// Basic usage
<FormDate
  id="birthday"
  value={form.data.birthday}
  onChange={(date) => form.setData("birthday", date)}
  error={form.errors.birthday}
  label="Birthday"
/>;

// With useField hook - automatically handles errors from Laravel validation
<FormDate label="Birthday" {...useField("birthday")} required />;

FormMultiSelect

A multi-select component for selecting multiple options.

import { FormMultiSelect, useField } from "@codecn/inertia-field-input";

const options = [
  { label: "Tag 1", value: "tag1" },
  { label: "Tag 2", value: "tag2" },
  { label: "Tag 3", value: "tag3" },
];

// Basic usage
<FormMultiSelect
  id="tags"
  value={form.data.tags}
  onChange={(values) => form.setData("tags", values)}
  options={options}
  error={form.errors.tags}
  label="Tags"
/>;

// With useField hook - automatically handles errors from Laravel validation
<FormMultiSelect
  label="Tags"
  {...useField("tags")}
  options={[
    { label: "Tag 1", value: "tag1" },
    { label: "Tag 2", value: "tag2" },
  ]}
/>;

Core Hooks

useForm

A hook that simplifies form handling with Inertia.js. You can destructure it just like Inertia's useForm.

import { useForm, useField } from "@codecn/inertia-field-input";

// Destructure useForm like Inertia.js
const {
  data,
  setData,
  errors,
  processing,
  reset,
  post,
  put,
  patch,
  delete: destroy,
} = useForm({
  name: "",
  email: "",
  terms: false,
});

// Access form data
console.log(data);

// Set form data
setData("name", "John Doe");

// Handle form submission
const handleSubmit = (e) => {
  e.preventDefault();
  post("/api/users");
};

// Access form errors
console.log(errors);

// Check if form is processing
console.log(processing);

// Reset form
reset();

useField

A hook that provides field-specific functionality for form inputs and automatically handles error display.

import { useForm } from "@codecn/inertia-field-input";

const { useField } = useForm({
  name: '',
  email: ''
})
// The useField hook returns an object with all necessary props for a form field
// including value, onChange, error, and other attributes needed for the field

// You can spread these props directly into your form components
<FormInput label="Name" {...useField('name')} required />;

// You can also combine with additional props
<FormInput label="Email" {...useField("email")} type="email" autoComplete="email" />;

Integration with Laravel

This package is designed to work seamlessly with Laravel's backend validation. When using the useField hook, errors from Laravel's validation will automatically be displayed in the corresponding form fields.

// In your Laravel controller
public function store(Request $request)
{
    $validated = $request->validate([
        'name' => 'required|string|max:255',
        'email' => 'required|email|unique:users',
        'terms' => 'required|accepted',
    ]);

    // Process the validated data
    // ...

    return redirect()->back()->with('success', 'User created successfully');
}

Complete Form Example

Here's a complete example of a form using the components and hooks:

import { useForm, FormInput, FormSelect, FormCheckbox, FormMultiSelect } from "@codecn/inertia-field-input";

export default function UserForm() {
  const { useField, processing, post } = useForm({
    name: "",
    email: "",
    role: "",
    terms: false,
    tags: [],
  });

  const handleSubmit = (e) => {
    e.preventDefault();
    post("/api/users");
  };

  const roleOptions = [
    { label: "Admin", value: "admin" },
    { label: "User", value: "user" },
    { label: "Guest", value: "guest" },
  ];

  const tagOptions = [
    { label: "Frontend", value: "frontend" },
    { label: "Backend", value: "backend" },
    { label: "DevOps", value: "devops" },
  ];

  return (
    <form onSubmit={handleSubmit}>
      <FormInput label="Name" {...useField("name")} required autoComplete="name" placeholder="Full name" />

      <FormInput
        type="email"
        label="Email"
        {...useField("email")}
        required
        autoComplete="username"
        placeholder="Email address"
      />

      <FormSelect label="Role" {...useField("role")} options={roleOptions} required />

      <FormMultiSelect label="Tags" {...useField("tags")} options={tagOptions} />

      <FormCheckbox label="I agree to the terms" {...useField("terms")} required />

      <button
        type="submit"
        disabled={processing}
        className="px-4 py-2 bg-blue-500 text-white rounded hover:bg-blue-600 disabled:opacity-50"
      >
        {processing ? "Saving..." : "Save User"}
      </button>
    </form>
  );
}

Styling

All components are styled using shadcn/ui's design system and can be customized using Tailwind CSS classes.

<FormInput label="Name" {...useField("name")} className="w-full max-w-md" />

License

MIT