Modify the appearance of a nested div using CSS hover on the main JSX container

Within the material-ui table component, I am dynamically mapping rows and columns. The className is set to clickableRow.

The TableRow also includes a hover options div on the right side:

const generateTableHoverOptions = () => {
  if (selected) {
    return (
      <TableCell className={classes.rightHoverIcon}>
        <Icon>expand_more</Icon>
      </TableCell>
    );
  }
  return null;
};

I'm trying to change the backgroundColor of the <TableCell /> with the class rightHoverIcon when hovering over the clickableRow. Here's the CSS code I have been using:

.clickableRow: {
  '&:hover': {
    backgroundColor: theme.palette.background.default,
    cursor: 'pointer',
  },
  '&:hover > .rightHoverIcon': {
    backgroundColor: 'red',
  },
},
.rightHoverIcon: {
  display: 'flex',
  alignItems: 'center',
  justifyContent: 'center',
  marginTop: 1,
  height: 49,
  position: 'absolute',
  right: 0,
  borderBottomWidth: 1,
  borderBottomColor: 'rgba(224, 224, 224, 1)',
},

I've tried different selectors like '&:hover ~ .rightHoverIcon' and &:hover .rightHoverIcon, but none seem to work as expected.

If anyone has any insights or solutions to offer, please share! Thanks!

javascripthtmlcssmaterial-uijsx

Answer №1

&:hover > .rightHoverIcon is designed to work when .rightHoverIcon is a direct child of clickableRow, but in this case, there is a table cell in-between. To fix this, remove the > and use a descendant combinator instead of a child combinator:

clickableRow: {
  '&:hover': {
    backgroundColor: theme.palette.background.default,
    cursor: 'pointer',
  },
  '&:hover .rightHoverIcon': {
  // -----^
    backgroundColor: 'red',
  },
},

Alternatively, if you prefer to use child combinators, you will need to have at least two of them (assuming TableCell only adds one element between its parent and the icon), for example: 

&:hover > something-for-the-cell > .rightHoverIcon
.

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