My app is using Material-UI and material-table. A global theme is applied in the "index.js" file using "ThemeProvider" with as a child and then has children:
<Fragment>
<CssBaseline />
<MenuAppBar />
<main className={classes.main}>
<Route path="/" exact component={Home} />
<Route path="/login" component={Login}></Route>
</main>
</Fragment>
The component then has the component with the material-table. When I add in the table component and view that page the AppBar looses some of it's styling, e.g. background color and alignment in the dropdown buttons for Pofile and Logout (https://material-ui.com/components/app-bar/#app-bar-with-menu). I'm puzzled why this happens.
Digging into the CSS, on the page where the AppBar style is changed I see that .MuiPaper-root is imported before .MuiAppBar-colorPrimary and therefore overrides the style, but still not sure why adding the component with the "material-table" causes this to happen.
My app dependencies are:
"dependencies": {
"@material-ui/core": "^4.2.1",
"@material-ui/icons": "^4.2.1",
"axios": "^0.19.0",
"jwt-decode": "^2.2.0",
"material-table": "^1.40.1",
"react": "^16.8.6",
"react-dom": "^16.8.6",
"react-router": "^5.0.1",
"react-router-dom": "^5.0.1",
"react-scripts": "3.0.1",
"react-svg": "^10.0.11"
},
I also see that "material-table" lists two different versions of "material-ui/core", but not sure how to resolve that.
"material-table": {
"version": "1.40.1",
"resolved": "https://registry.npmjs.org/material-table/-/material-table-1.40.1.tgz",
"integrity": "sha512-rZuGhNpXFzROlqJUVLH+E5yzt9MxaYVZfDNuHWtM9EWlbUGQJWuGQNcsSmdr0XeTCZkQvVnZYbEkRcUu+71rfQ==",
"requires": {
"@date-io/date-fns": "^1.1.0",
"@material-ui/core": "^4.0.1",
"@material-ui/pickers": "^3.0.0",
"classnames": "^2.2.6",
"date-fns": "^2.0.0-alpha.27",
"debounce": "^1.2.0",
"filefy": "0.1.9",
"prop-types": "^15.6.2",
"react-beautiful-dnd": "11.0.3",
"react-double-scrollbar": "0.0.15"
},
"dependencies": {
"@material-ui/core": {
"version": "4.2.1",
...
Through finding a few other posts 1 and 2 I tried to downgrade my versions of material-ui/core and material-ui/icons to version 4.0.1 (the same used by material-table) and that worked.
For full details:
npm uninstall @material-ui/core
npm uninstall @material-ui/icons
npm install @material-ui/core@4.0.1
npm install @material-ui/icons@4.0.1
来源：https://stackoverflow.com/questions/57204404/adding-component-with-material-table-changes-material-ui-appbar-style