MUI: Align and adjust image center in flexbox

Question

Why is my image centered but not aligned? I'm confused..

<Box
      sx={{
        display: 'flex',
        minHeight: '100vh',
        alignItems: 'center',
        flexGrow: 1,
      }}>
      <Container maxWidth="sm">
        <img src="https://static.vecteezy.com/system/resources/previews/001/200/294/original/house-png.png"
          width={200}
          alt="img"
        />
        <LinearProgress sx={{ mt: 4 }} />
      </Container>
    </Box>

Answer 1

If you want to center-align the content, you must use the "justifyContent: 'center'" attribute. Also, there are some issues with the "Container" element, you can use .

Check if this is what you want to achieve

<Box
  sx={{
    display: "flex",
    minHeight: "100vh",
    alignItems: "center",
    justifyContent: "center",
    flexGrow: 1
  }}
>
  <Box>
    <img
      src="https://static.vecteezy.com/system/resources/previews/001/200/294/original/house-png.png"
      width={200}
      alt="img"
    />
    <LinearProgress sx={{ mt: 4 }} />
  </Box>
</Box>

Demo on Codesandbox

Answer 2

You can wrap img with Box

<Box
  sx={{
    display: 'flex',
    minHeight: '100vh',
    alignItems: "center",
    flexGrow: 1,
  }}
>
  <Container maxWidth="sm">
    <Box
      sx={{
        display: 'flex',
        justifyContent: "center"
      }}
    >
      <img
        src="https://static.vecteezy.com/system/resources/previews/001/200/294/original/house-png.png"
        width={200}
        alt="img"
      />
    </Box>
    <LinearProgress sx={{ mt: 4 }} />
  </Container>
</Box>

View my demo here