Here is a method to target the "wrapper" element inside each tab:
const useStyles = makeStyles((theme) => ({
tabs: {
"& .MuiTab-wrapper": {
flexDirection: "row",
justifyContent: "flex-start"
}
}
}));
This code snippet shows my modified version of your sandbox:
import React from "react";
import PropTypes from "prop-types";
import { makeStyles } from "@material-ui/core/styles";
import Tabs from "@material-ui/core/Tabs";
import Tab from "@material-ui/core/Tab";
import Typography from "@material-ui/core/Typography";
import Box from "@material-ui/core/Box";
function TabPanel(props) {
const { children, value, index, ...other } = props;
return (
<div
role="tabpanel"
hidden={value !== index}
id={`vertical-tabpanel-${index}`}
aria-labelledby={`vertical-tab-${index}`}
{...other}
>
{value === index && (
<Box p={3}>
<Typography>{children}</Typography>
</Box>
)}
</div>
);
}
TabPanel.propTypes = {
children: PropTypes.node,
index: PropTypes.any.isRequired,
value: PropTypes.any.isRequired
};
function a11yProps(index) {
return {
id: `vertical-tab-${index}`,
"aria-controls": `vertical-tabpanel-${index}`
};
}
const useStyles = makeStyles((theme) => ({
root: {
flexGrow: 1,
backgroundColor: theme.palette.background.paper,
display: "flex",
height: 224
},
tabs: {
borderRight: `1px solid ${theme.palette.divider}`,
"& .MuiTab-wrapper": {
flexDirection: "row",
justifyContent: "flex-start"
}
}
}));
export default function VerticalTabs() {
const classes = useStyles();
const [value, setValue] = React.useState(0);
const handleChange = (event, newValue) => {
setValue(newValue);
};
return (
<div className={classes.root}>
<Tabs
orientation="vertical"
variant="scrollable"
value={value}
onChange={handleChange}
aria-label="Vertical tabs example"
className={classes.tabs}
>
<Tab label="Item One" {...a11yProps(0)} />
<Tab label="Item Two" {...a11yProps(1)} />
<Tab label="Item Three" {...a11yProps(2)} />
<Tab label="Item Four" {...a11yProps(3)} />
<Tab label="Item Five" {...a11yProps(4)} />
<Tab label="Item Six" {...a11yProps(5)} />
<Tab label="Item Seven" {...a11yProps(6)} />
</Tabs>
<TabPanel value={value} index={0}>
Item One
</TabPanel>
<TabPanel value={value} index={1}>
Item Two
</TabPanel>
<TabPanel value={value} index={2}>
Item Three
</TabPanel>
<TabPanel value={value} index={3}>
Item Four
</TabPanel>
<TabPanel value={value} index={4}>
Item Five
</TabPanel>
<TabPanel value={value} index={5}>
Item Six
</TabPanel>
<TabPanel value={value} index={6}>
Item Seven
</TabPanel>
</div>
);
}
https://codesandbox.io/s/left-aligned-tabs-uirw8?fontsize=14&hidenavigation=1&theme=dark