Form Error

Introduction

The form-error component provides an easy way to work with Laravel's $error message bag in its Blade views. You can use it to display error messages for form fields.

This isn't a component you will usually reach for, as in most cases you will probably want to use the form-group component to render the label and errors automatically for you, but this component is available to use for other use cases you may have.

Basic Usage

Imagine we have the following validation error:

['first_name' => 'Incorrect first name.']

The most basic usage of the form-error component exists in using it as a self-closing component using a name attribute:

<x-form-error name="first_name" />

This will output:

<p class="form-error mt-1 text-red-500 text-sm" id="first_name-error">
    Incorrect first name.
</p>

As you can see it'll pick the error message from the $error message bag and render it in the view. If the message isn't set, the HTML isn't rendered.

It also sets the input id automatically from the name attribute, but you can easily override it by setting the input-id attribute to the relevant input's id. The input id is used in the id attribute, which can be referenced by an aria-describedby attribute on your input element.

Composing The Content

You can also opt to composing how the rendered content looks too. This allows you to make use of hte component's messages() method to render multiple validation errors at the same time.

Let's assume we have the following validation errors:

[
    'first_name' => [
        'Incorrect first name.',
        'Needs at least 5 characters.',
    ],
]

Now we'll use the component's slot and its messages() method to render an unordered list of the errors:

<x-form-error tag="ul" name="first_name">
    @foreach ($component->messages($errors) as $error)
        <li>{{ $error }}</li>
    @endforeach
</x-form-error>

We also specified the tag attribute to change the element tag from the default p tag to a ul tag.

This will output:

<ul class="form-error" id="first_name-error">
    <li>Incorrect first name.</li>
    <li>Needs at least 5 characters.</li>
</ul>

As you can see we need to pass in the $errors message bag to the messages() method of the component to grab all the messages for our field. Then we loop over them and render them.

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