Adding a linear gradient to Material UI icon

Question

I've tried the process described in this question Trying to add linear gradient to a martialUI icon as a comment stated it should work, but it does not for me.

Thinking that maybe the icons counted as text, I've tried several of the ways to add gradients to text such as here: https://css-tricks.com/snippets/css/gradient-text/.

Yet I haven't gotten anything to work. The gradient either shows as a box image in the foreground, in front of the icon, or just not at all. Does anyone know how to add a gradient to Material UI icons?

EDIT: Forgot to post my code, here's the relevant snippet:

const useStyles = makeStyles((theme) => ({
root: {
  display: 'flex',
},
appBar: {
  zIndex: theme.zIndex.drawer + 1,
},
drawer: {
  width: drawerWidth,
  flexShrink: 0
},
drawerPaper: {
  width: drawerWidth,
  backgroundColor:muiTheme.palette.secondary.main
},
drawerContainer: {
  overflow: 'auto',
  background:muiTheme.palette.secondary.main
},
content: {
  flexGrow: 1,
  padding: theme.spacing(3),
},
sideBarButton: {
    fill: "#FFFFFF",
    fontSize: "50px"
}
  }));



const SideBar = (props) => {
    const classes = useStyles();
    return (
        <MuiThemeProvider theme={muiTheme}>
            <Drawer
                className={classes.drawer}
                variant="permanent"
                classes={{
                paper: classes.drawerPaper,
                }}
            >
            <Toolbar />
            <div className={classes.drawerContainer}>
                <Box display="flex" flexDirection="column" padding="0" margin="0"   >
                <List>
                    <ListItem button>
                        <ListItemIcon> <SearchIcon className={classes.sideBarButton}/> </ListItemIcon>
                        <ListItemText/>
                    </ListItem>
                    <ListItem button>
                        <ListItemIcon> <AddCircleIcon className={classes.sideBarButton}/> </ListItemIcon>
                        <ListItemText/>
                    </ListItem>
                </List>
                </Box>
            </div>
            </Drawer>
        </MuiThemeProvider>
    )
}

More precisely, this is the list item (which is a material icon) I'm trying to add gradient to:

<ListItemIcon> 
    <SearchIcon className{classes.sideBarButton}/> 
</ListItemIcon>

And this is the style applied:

sideBarButton: {
    background: "linear-gradient(to right, #ad5389, #3c1053)",
    fontSize: "50px"
}

The other methods I've tried per the links above:

// Just put the style in the tag, doesn't compile
<SearchIcon className={classes.sideBarButton} style={{linear-gradient(to right bottom, #FD297B, #FF5864, #FF655B)}}/>

Another method:

    sideBarButton:{
     background: "-webkit-linear-gradient(#eee, #333)",
     WebkitBackgroundClip: "text",
     WebkitTextFillColor: "transparent",
     fontSize: "50px"
    }

Yet another method via https://fossheim.io/writing/posts/css-text-gradient/ :

 sideBarButton:{
        /* Create the gradient. */
     backgroundImage: "linear-gradient(45deg, #f3ec78, #af4261)",

    /* Set the background size and repeat properties. */
    backgroundSize: "100%",
    backgroundRepeat: "repeat",

    /* Use the text as a mask for the background. */
    /* This will show the gradient as a text color rather than element bg. */
    WebkitBackgroundClip: "text",
    WebkitTextFillColor: "transparent",
    MozBackgroundClip: "text",
    MozTextFillColor: "transparent",
    fontSize: "50px"
    }

P.S. I'm just now learning React, I may very well be missing something simple. Please let me know if you need more info.

Answer 1

Here is an example using Material UI v5.

The fill property of the icon is linked to the linear gradient's id property.

import OpenWithIcon from "@material-ui/icons/OpenWith"

const GradientOpenWithIcon = () => (
  <>
    <svg width={0} height={0}>
      <linearGradient id="linearColors" x1={1} y1={0} x2={1} y2={1}>
        <stop offset={0} stopColor="rgba(241,184,74,1)" />
        <stop offset={1} stopColor="rgba(207,113,8,1)" />
      </linearGradient>
    </svg>
    <OpenWithIcon sx={{ fill: "url(#linearColors)" }} />
  </>
)