无样式的按钮

Buttons let users take actions and make choices with a single tap.

Introduction

ButtonUnstyled replaces the native HTML <button> element.

Component

Usage

After installation, you can start building with this component using the following basic elements:

import ButtonUnstyled from '@mui/base/ButtonUnstyled';

export default function MyApp() {
  return <ButtonUnstyled>{/* button text */}</ButtonUnstyled>;
}

Basics

ButtonUnstyled behaves similarly to the native HTML <button>, so it wraps around the text that will be displayed on its surface.

The following demo shows how to create and style two basic buttons. Notice that the second button cannot be clicked due to the disabled prop:

import * as React from 'react';
import ButtonUnstyled, { buttonUnstyledClasses } from '@mui/base/ButtonUnstyled';
import { styled } from '@mui/system';
import Stack from '@mui/material/Stack';

const blue = {
  500: '#007FFF',
  600: '#0072E5',
  700: '#0059B2',
};

const CustomButton = styled(ButtonUnstyled)`
  font-family: IBM Plex Sans, sans-serif;
  font-weight: bold;
  font-size: 0.875rem;
  background-color: ${blue[500]};
  padding: 12px 24px;
  border-radius: 12px;
  color: white;
  transition: all 150ms ease;
  cursor: pointer;
  border: none;

  &:hover {
    background-color: ${blue[600]};
  }

  &.${buttonUnstyledClasses.active} {
    background-color: ${blue[700]};
  }

  &.${buttonUnstyledClasses.focusVisible} {
    box-shadow: 0 4px 20px 0 rgba(61, 71, 82, 0.1), 0 0 0 5px rgba(0, 127, 255, 0.5);
    outline: none;
  }

  &.${buttonUnstyledClasses.disabled} {
    opacity: 0.5;
    cursor: not-allowed;
  }
`;

export default function UnstyledButtonsSimple() {
  return (
    <Stack spacing={2} direction="row">
      <CustomButton>Button</CustomButton>
      <CustomButton disabled>Disabled</CustomButton>
    </Stack>
  );
}

Anatomy

The ButtonUnstyled component is composed of a root <button> slot with no interior slots:

<button class="BaseButton-root">
  <!-- button text goes here -->
</button>

Slot props

Use the component prop to override the root slot with a custom element:

<ButtonUnstyled component="div" />

If you provide a non-interactive element such as a <span>, the ButtonUnstyled component will automatically add the necessary accessibility attributes.

Use the components prop to override any interior slots in addition to the root:

<ButtonUnstyled components={{ Root: 'div' }} />

Use the componentsProps prop to pass custom props to internal slots. The following code snippet applies a CSS class called my-button to the root slot:

<ButtonUnstyled componentsProps={{ root: { className: 'my-button' } }} />

Compare the attributes on the <span> in this demo with the ButtonUnstyled from the previous demo:

ButtonDisabled

<CustomButton component="span">Button</CustomButton>
<CustomButton component="span" disabled>
  Disabled
</CustomButton>

Hook

import { useButton } from '@mui/base/ButtonUnstyled';

The useButton hook lets you apply the functionality of ButtonUnstyled to a fully custom component. It returns props to be placed on the custom component, along with fields representing the component's internal state.

Hooks do not support slot props, but they do support customization props.

The useButton hook requires the ref of the element it's used on.

The following demo shows how to build the same buttons as those found in the Basic usage section, but with the useButton hook:

import * as React from 'react';
import clsx from 'clsx';
import { ButtonUnstyledProps, useButton } from '@mui/base/ButtonUnstyled';
import { styled } from '@mui/system';
import Stack from '@mui/material/Stack';

const blue = {
  500: '#007FFF',
  600: '#0072E5',
  700: '#0059B2',
};

const CustomButtonRoot = styled('button')`
  font-family: IBM Plex Sans, sans-serif;
  font-weight: bold;
  font-size: 0.875rem;
  background-color: ${blue[500]};
  padding: 12px 24px;
  border-radius: 12px;
  color: white;
  transition: all 150ms ease;
  cursor: pointer;
  border: none;

  &:hover {
    background-color: ${blue[600]};
  }

  &.active {
    background-color: ${blue[700]};
  }

  &.focusVisible {
    box-shadow: 0 4px 20px 0 rgba(61, 71, 82, 0.1), 0 0 0 5px rgba(0, 127, 255, 0.5);
    outline: none;
  }

  &.disabled {
    opacity: 0.5;
    cursor: not-allowed;
  }
`;

const CustomButton = React.forwardRef(function CustomButton(
  props: ButtonUnstyledProps,
  ref: React.ForwardedRef<any>,
) {
  const { children } = props;
  const { active, disabled, focusVisible, getRootProps } = useButton({
    ...props,
    ref,
  });

  const classes = {
    active,
    disabled,
    focusVisible,
  };

  return (
    <CustomButtonRoot {...getRootProps()} className={clsx(classes)}>
      {children}
    </CustomButtonRoot>
  );
});

export default function UseButton() {
  return (
    <Stack spacing={2} direction="row">
      <CustomButton onClick={() => console.log('click!')}>Button</CustomButton>
      <CustomButton disabled>Disabled</CustomButton>
    </Stack>
  );
}

Customization

Custom elements

ButtonUnstyled accepts a wide range of custom elements beyond HTML elements. You can even use SVGs, as the following demo illustrates:

Focus on disabled buttons

Similarly to the native HTML <button> element, the ButtonUnstyled component can't receive focus when it's disabled. This may reduce its accessibility, as screen readers won't be able to announce the existence and state of the button.

The focusableWhenDisabled prop lets you change this behavior. When this prop is set, the underlying button does not set the disabled prop. Instead, aria-disabled is used, which makes the button focusable.

This should be used whenever the disabled button needs to be read by screen readers.

MUI Base uses this prop internally in menu items, making it possible to use the keyboard to navigate to disabled items (in compliance with ARIA guidelines).

The following demo shows how the focusableWhenDisabled prop works—use the Tab key to navigate within this document to see that only the second button accepts the focus:

<CustomButton disabled>focusableWhenDisabled = false</CustomButton>
<CustomButton disabled focusableWhenDisabled>
  focusableWhenDisabled = true
</CustomButton>

The focusableWhenDisabled prop works the same when the root slot is customized, except that the aria-disabled attribute is used no regardless of the prop's state. The ability to receive focus is controlled internally by the tabindex attribute.

focusableWhenDisabled = falsefocusableWhenDisabled = true

<CustomButton component="span" disabled>
  focusableWhenDisabled = false
</CustomButton>
<CustomButton component="span" disabled focusableWhenDisabled>
  focusableWhenDisabled = true
</CustomButton>

API

<ButtonUnstyled />