Mastering the alignment of Material-UI Menu items

When using the menu and menu item components of material-ui to create a select dropdown menu, I encountered an unusual issue where the dropdown menu always expands to the left side of the box, as shown in the image below: https://i.stack.imgur.com/ykRrp.jpg

I attempted to use the alignItems property within my <MenuItem>, but it did not resolve the problem.

Below is my code. Can anyone provide assistance in resolving this issue? Your help would be greatly appreciated!

          <Menu
            id="order-menu"
            anchorEl={anchorEl}
            keepMounted
            open={Boolean(anchorEl)}
            onClose={() => setAnchorEl(null)}
          >
            {options.map((option, index) => (
              <MenuItem
                key={option}
                selected={index === selectedIndex}
                onClick={(event) => handleMenuItemClick(event, index)}
              >
                {option}
              </MenuItem>
            ))}
          </Menu>
javascriptcssreactjsmaterial-ui

Answer №1

The default alignment styles can be found in the ListItem component, specifically where it sets justifyContent: 'flex-start'.

To align the content to the right, you can use the following code:

const MenuItem = withStyles({
  root: {
    justifyContent: "flex-end"
  }
})(MuiMenuItem);

Below is a complete example of how this works:

import React from "react";
import Button from "@material-ui/core/Button";
import Menu from "@material-ui/core/Menu";
import MuiMenuItem from "@material-ui/core/MenuItem";
import { withStyles } from "@material-ui/core/styles";

const MenuItem = withStyles({
  root: {
    justifyContent: "flex-end"
  }
})(MuiMenuItem);

export default function SimpleMenu() {
  const [anchorEl, setAnchorEl] = React.useState(null);

  const handleClick = event => {
    setAnchorEl(event.currentTarget);
  };

  const handleClose = () => {
    setAnchorEl(null);
  };

  return (
    <div>
      <Button
        aria-controls="simple-menu"
        aria-haspopup="true"
        onClick={handleClick}
      >
        Open Menu
      </Button>
      <Menu
        id="simple-menu"
        anchorEl={anchorEl}
        keepMounted
        open={Boolean(anchorEl)}
        onClose={handleClose}
      >
        <MenuItem onClick={handleClose}>1</MenuItem>
        <MenuItem onClick={handleClose}>2</MenuItem>
        <MenuItem onClick={handleClose}>3</MenuItem>
        <MenuItem onClick={handleClose}>10</MenuItem>
        <MenuItem onClick={handleClose}>20</MenuItem>
        <MenuItem onClick={handleClose}>300</MenuItem>
      </Menu>
    </div>
  );
}

https://codesandbox.io/s/menuitem-align-right-xlfvl?fontsize=14&hidenavigation=1&theme=dark

For more information, refer to these resources:

Answer №2

Utilize the following code snippet for menu alignment

anchorOrigin={{
  vertical: 'bottom',
  horizontal: 'center',
}}
transformOrigin={{
  vertical: 'bottom',
  horizontal: 'center',
}}

Usage Example:

<Menu
 id="order-menu"
 anchorEl={anchorEl}
 keepMounted
 open={Boolean(anchorEl)}
 onClose={() => setAnchorEl(null)}
 anchorOrigin={{
   vertical: 'bottom',
   horizontal: 'center',
 }}
 transformOrigin={{
   vertical: 'bottom',
   horizontal: 'center',
 }}
 style={{top: 170}} // Specify top position for display under selection
>
 {options.map((option, index) => (
   <MenuItem
     key={option}
     selected={index === selectedIndex}
     onClick={(event) => handleMenuItemClick(event, index)}
   >
     {option}
   </MenuItem>
 ))}

Answer №3

If you're looking for a more adaptable solution to your issue,

try using <ListItemText> within <MenuItem>. This way, you can customize different parts of the element.

    <MenuItem onClick={handleClose}>
      <ListItemText style={{ paddingRight: 50 }}>undo</ListItemText>
      <ListItemText style={{ textAlign: "right" }}>ctrl+z</ListItemText>
    </MenuItem>

For example, check out this demo showcasing a shortcut hint aligned on the right.

Answer №4

It's suggested that mui 5 implement the use of sx for styling.

<MenuOption sx={{ justifyContent: 'flex-end' }}>

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