Why is it that code that appears identical in the same browser and same size can look different when one version is deployed on localhost and the other remotely?

I've been working on a Material-UI Table where I customized the headers and table styles.

While testing it locally with yarn start, it looked like this:

https://i.stack.imgur.com/7yU2H.png

However, when I viewed it on the remote system, it appeared like this:

https://i.stack.imgur.com/HgRns.png

The font-size and alignment seemed off between the two instances, even though they were in the same browser on the same system but different tabs.

Below are the specific code modifications that I implemented:

const StyledTableRow = styled(TableRow)(({ theme }) => ({
  '&:nth-of-type(odd)': {
    backgroundColor: theme.palette.action.hover,
  },
  // hide last border
  '&:last-child td, &:last-child th': {
    border: 0,
  },
}));

const StyledAvatar = styled(Avatar)`
  box-shadow: 0px 1px 3px #777;
`;

const NoTableCellPadding = styled(TableCell)`
  font-size: 0.75rem;
  font-family: Roboto;
  text-align: center;

  &.MuiTableCell-head {
    background: linear-gradient(#ddd, #fff 40%, #ddd);
    border-right: 1px solid #ccc;
  }
 
  &.MuiTableCell-head:last-child th' {
    border-right: none;
  }
`;

Now, I'm puzzled as to why these style changes aren't reflecting correctly. Any suggestions on where to troubleshoot?

Answer №1

Ultimately, it all boiled down to this:

const NoTableCellPadding = styled(TableCell)`
  font-size: 0.75rem;
  font-family: Roboto;
  text-align: center;
...

The necessary adjustment is as follows:

const NoTableCellPadding = styled(TableCell)`
  & {
    font-size: 0.75rem;
    font-family: Roboto;
    text-align: center;
  }
...

This still doesn't clarify why I didn't encounter this issue locally, but it's plausible that it pertains to the functioning of the hot reload feature when using yarn start and how it manages style information. Utilizing styled generates optimized CSS post compilation for a production build.

Henty made an insightful suggestion to compare the disparities, although the reason behind them wasn't apparent until I noticed numerous <style> tags in the inspector.

Thus, thank you Henty!

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