Popper

A Popper can be used to display some content on top of another. It's an alternative to react-popper.

Some important features of the Popper component:

🕷 Popper relies on the 3rd party library (Popper.js) for perfect positioning.
💄 It's an alternative API to react-popper. It aims for simplicity.
8 1 кБ в сжатом виде.
The children is Portal to the body of the document to avoid rendering problems. You can disable this behavior with disablePortal.
The scroll isn't blocked like with the Popover component. The placement of the popper updates with the available area in the viewport.
Clicking away does not hide the Popper component. If you need this behavior, you can use ClickAwayListener - see the example in the menu documentation section.
The anchorEl is passed as the reference object to create a new Popper.js instance.

Simple Popper

<button aria-describedby={id} type="button" onClick={handleClick}>
  Toggle Popper
</button>
<Popper id={id} open={open} anchorEl={anchorEl}>
  <Box sx={{ border: 1, p: 1, bgcolor: 'background.paper' }}>
    The content of the Popper.
  </Box>
</Popper>

Переходы

The open/close state of the popper can be animated with a render prop child and a transition component. This component should respect the following conditions:

Be a direct child descendent of the popper.
Call the onEnter callback prop when the enter transition starts.
Call the onExited callback prop when the exit transition is completed. Call the onExited callback prop when the exit transition is completed.

Popper has built-in support for react-transition-group.

<button aria-describedby={id} type="button" onClick={handleClick}>
  Toggle Popper
</button>
<Popper id={id} open={open} anchorEl={anchorEl} transition>
  {({ TransitionProps }) => (
    <Fade {...TransitionProps} timeout={350}>
      <Box sx={{ border: 1, p: 1, bgcolor: 'background.paper' }}>
        The content of the Popper.
      </Box>
    </Fade>
  )}
</Popper>

Alternatively, you can use react-spring.

<button aria-describedby={id} type="button" onClick={handleClick}>
  Toggle Popper
</button>
<Popper id={id} open={open} anchorEl={anchorEl} transition>
  {({ TransitionProps }) => (
    <Fade {...TransitionProps}>
      <Box sx={{ border: 1, p: 1, bgcolor: 'background.paper' }}>
        The content of the Popper.
      </Box>
    </Fade>
  )}
</Popper>

Positioned popper

Scroll playground

Scroll around this container to experiment with flip and preventOverflow modifiers.

Appearance

Placement

Disable portal(the children stay within it's parent DOM hierarchy)

Modifiers (options from Popper.js)

<Popper
    placement="bottom"
    disablePortal={false}
    modifiers={[
      {
          name: 'flip',
          enabled: true,
          options: {
            altBoundary: true,
            rootBoundary: 'document',
            padding: 8
          }
      },
      {
        name: 'preventOverflow',
        enabled: true,
        options: {
          altAxis: true,
          altBoundary: true,
          tether: true,
          rootBoundary: document,
          padding: 8
        }
      },
      {
        name: 'arrow',
        enabled: false,
        options: {
            element: arrowRef,
        }
      },
    ]}
  >

Virtual element

Значение anchorEl может быть ссылкой на фиктивный DOM-элемент. You need to create an object shaped like the VirtualElement.

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Дополнительные проекты

Для более сложных вариантов использования вы можете воспользоваться:

PopupState helper

Существует сторонний пакет material-ui-popup-state, который, в большинстве случаев, заботится о состоянии всплывающего меню за вас.

API

<Popper />