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Bootstrap/site/content/docs/5.0/forms/overview.md
XhmikosR 38ec7c4df7
Bump version to 5.0.0-alpha1 (#29925)
Also add v4.5.0 in versions and keep README.md pointing to v4.5.0 so that there are no broken stuff.
2020-05-13 22:36:00 +03:00

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Markdown

---
layout: docs
title: Forms
description: Examples and usage guidelines for form control styles, layout options, and custom components for creating a wide variety of forms.
group: forms
toc: true
aliases: "/docs/5.0/forms/"
sections:
- title: Form control
description: Style textual inputs and textareas with support for multiple states.
- title: Select
description: Improve browser default select elements with a custom initial appearance.
- title: Checks
description: Use our custom radio buttons and checkboxes in forms for selecting input options.
- title: File
description: Replace browser default file inputs with our custom version with optional JavaScript.
- title: Range
description: Replace browser default range inputs with our custom version.
- title: Input group
description: Attach labels and buttons to your inputs for increased semantic value.
- title: Layout
description: Create inline, horizontal, or complex grid-based layouts with your forms.
- title: Validation
description: Validate your forms with custom or native validation behaviors and styles.
---
## Overview
Bootstrap's form controls expand on [our Rebooted form styles]({{< docsref "/content/reboot#forms" >}}) with classes. Use these classes to opt into their customized displays for a more consistent rendering across browsers and devices.
Be sure to use an appropriate `type` attribute on all inputs (e.g., `email` for email address or `number` for numerical information) to take advantage of newer input controls like email verification, number selection, and more.
Here's a quick example to demonstrate Bootstrap's form styles. Keep reading for documentation on required classes, form layout, and more.
{{< example >}}
<form>
<div class="mb-3">
<label for="exampleInputEmail1" class="form-label">Email address</label>
<input type="email" class="form-control" id="exampleInputEmail1" aria-describedby="emailHelp">
<div id="emailHelp" class="form-text">We'll never share your email with anyone else.</div>
</div>
<div class="mb-3">
<label for="exampleInputPassword1" class="form-label">Password</label>
<input type="password" class="form-control" id="exampleInputPassword1">
</div>
<div class="mb-3 form-check">
<input type="checkbox" class="form-check-input" id="exampleCheck1">
<label class="form-check-label" for="exampleCheck1">Check me out</label>
</div>
<button type="submit" class="btn btn-primary">Submit</button>
</form>
{{< /example >}}
## Form text
Block-level or inline-level form text can be created using `.form-text`.
{{< callout warning >}}
##### Associating form text with form controls
Form text should be explicitly associated with the form control it relates to using the `aria-describedby` attribute. This will ensure that assistive technologies—such as screen readers—will announce this form text when the user focuses or enters the control.
{{< /callout >}}
Form text below inputs can be styled with `.form-text`. If a block-level element will be used, a top margin is added for easy spacing from the inputs above.
{{< example >}}
<label for="inputPassword5" class="form-label">Password</label>
<input type="password" id="inputPassword5" class="form-control" aria-describedby="passwordHelpBlock">
<div id="passwordHelpBlock" class="form-text">
Your password must be 8-20 characters long, contain letters and numbers, and must not contain spaces, special characters, or emoji.
</div>
{{< /example >}}
Inline text can use any typical inline HTML element (be it a `<span>`, `<small>`, or something else) with nothing more than the `.form-text` class.
{{< example >}}
<div class="row g-3 align-items-center">
<div class="col-auto">
<label for="inputPassword6" class="col-form-label">Password</label>
</div>
<div class="col-auto">
<input type="password" id="inputPassword6" class="form-control" aria-describedby="passwordHelpInline">
</div>
<div class="col-auto">
<span id="passwordHelpInline" class="form-text">
Must be 8-20 characters long.
</span>
</div>
</div>
{{< /example >}}
## Disabled forms
Add the `disabled` boolean attribute on an input to prevent user interactions and make it appear lighter.
{{< highlight html >}}
<input class="form-control" id="disabledInput" type="text" placeholder="Disabled input here..." disabled>
{{< /highlight >}}
Add the `disabled` attribute to a `<fieldset>` to disable all the controls within.
By default, browsers will treat all native form controls (`<input>`, `<select>`, and `<button>` elements) inside a `<fieldset disabled>` as disabled, preventing both keyboard and mouse interactions on them. However, if your form also includes `<a ... class="btn btn-*">` elements, these will only be given a style of `pointer-events: none`.
{{< example >}}
<form>
<fieldset disabled aria-label="Disabled fieldset example">
<div class="mb-3">
<label for="disabledTextInput" class="form-label">Disabled input</label>
<input type="text" id="disabledTextInput" class="form-control" placeholder="Disabled input">
</div>
<div class="mb-3">
<label for="disabledSelect" class="form-label">Disabled select menu</label>
<select id="disabledSelect" class="form-select">
<option>Disabled select</option>
</select>
</div>
<div class="mb-3">
<div class="form-check">
<input class="form-check-input" type="checkbox" id="disabledFieldsetCheck" disabled>
<label class="form-check-label" for="disabledFieldsetCheck">
Can't check this
</label>
</div>
</div>
<button type="submit" class="btn btn-primary">Submit</button>
</fieldset>
</form>
{{< /example >}}