I am making a site with next.js and #emotion/styled.
I have a card component as below.
import React from 'react';
import styled from '#emotion/styled';
const Card: React.FC = (props) => {
return (
<Container>{props.children}</Container>
);
};
export default Card;
const Container = styled.div`
padding:36px;
`
and I want to override the style and add a border to it.
import Card from '#/components/atoms/products/Card'
import styled from '#emotion/styled';
const Test: React.FC = () =>{
return(<BorderedCard/>)
}
export default Test
const BorderedCard = styled(Card)`
height:300px:
border: solid 1px #244C95;
`
I import the card component and override it. I expected the card component to have a border, but the style did not apply for the component. This method works everywhere else in the project, but not for this component.
I suspected that somehow this component cannot be found, and checked the ts config file.
"include": [
"next-env.d.ts",
"src/**/*",
"emotion.d.ts"
],
Then I tried to change the directories of the files, but no change.
Anyone know why this overriding style is not working?
Any help would be appreciated.
Your Card component needs to have a className prop and pass it to your Container component. It's a requirement for emotion styled function to work: https://emotion.sh/docs/styled#styling-any-component.
const Card: React.FC = (props) => {
return (
<Container className={props.className}>{props.children}</Container>
);
};
Related
Like the title says, I have a problem with styled components. They do not want to render no matter what style attributes I add to them; they simply don't want to render. Does anyone know if I made a typo or something like that? This is the code I am working with.
import React from "react";
import styled from "styled-components";
const testStyled = styled.h1`
font-size:10px;
`;
export const Datepicker = () => {
return (
<div>
<testStyled>Test</testStyled>
</div>
);
};
Now this is how I am importing it into another component:
import React from "react";
import styled from "styled-components";
import {Datepicker} from "./Datepicker"
export const AnotherComponent = () => {
return (
<div>
<Datepicker></Datepicker>
</div>
);
};
Your problem here is that React components must start with a capital letter, even if they are styled components. You can read more about it here or here.
Your code should be like this
import React from "react";
import styled from "styled-components";
const TestStyled = styled.h1`
font-size:10px;
`;
export const Datepicker = () => {
return (
<div>
<TestStyled>Test</TestStyled>
</div>
);
};
React components use PascalCase: change testStyled to TestStyled.
const TestStyled = styled.h1`
font-size:10px;
`;
export const Datepicker = () => {
return (
<div>
<TestStyled>Test</TestStyled>
</div>
);
};
I am seeing examples of using the makeStyles hook so you can style your functional component in Material Design. But I am using a class component and so can't use hooks. The code I see being used for functional components is as follows:
const useStyles = makeStyles((theme) => ({
margin: {
margin: theme.spacing(1),
},
}));
And then for styling the elements in the return() section, they do something like this:
className={classes.margin}
How do I do the same type of thing but for a class component?
for class component you can use withStyles wrapper.
import React, { Component } from "react";
import { withStyles } from "#material-ui/core/styles";
class App extends Component {
render() {
const { classes } = this.props;
return <div className={classes.styledLine}>Styling using withStyles</div>;
}
}
const useStyles = (theme) => ({
styledLine: {
color: "red"
}
});
export default withStyles(useStyles)(App);
Working demo:-
I am looking for something like ThemeConsumer (which probably doesn't exist). I've React component and I am using withStyles() higher-order component to inject custom styles. It's pretty well described in documentation but I didn't find any example which uses theme.
I have some base component which contains ThemeProvider. It means any of MUI components are being affected by it.
const prefersDarkMode = useMediaQuery('(prefers-color-scheme: dark)');
const theme = getTheme(prefersDarkMode);
return (
<ThemeProvider theme={theme}>
...
</ThemeProvider>
)
I also use some functional components with makeStyles() to create styles with provided theme.
const useStyles = makeStyles(theme => ({
// here I can use theme provided by ThemeProvider
});
But it can't be used in class components. So I am using withStyles() HOC.
const styles = {
// I would like to use here provided theme too
}
export default withStyles(styles)(SomeComponent);
Summary of my question:
How do I use provided theme in class component?
withStyles supports similar syntax as makeStyles:
const styles = theme => ({
// here I can use theme provided by ThemeProvider
});
export default withStyles(styles)(SomeComponent);
Here's a simple working example:
import React from "react";
import { withStyles } from "#material-ui/core/styles";
import Paper from "#material-ui/core/Paper";
const StyledPaper = withStyles(theme => ({
root: {
backgroundColor: theme.palette.secondary.main
}
}))(Paper);
export default function App() {
return (
<StyledPaper className="App">
<h1>Hello CodeSandbox</h1>
<h2>Start editing to see some magic happen!</h2>
</StyledPaper>
);
}
A component decorated with withStyles(styles) gets a special classes prop injected, which may be used for your custom styles. For example:
import { Box } from "#material-ui/core"
import { withStyles } from "#material-ui/core/styles"
const styles = theme => ({
myCustomClass: {
color: theme.palette.tertiary.dark
}
})
class myComponent extends Component {
render() {
const { classes, theme } = this.props
// In last line, you see we have passed `{ withTheme: true }` option
// to have access to the theme variable inside the class body. See it
// in action in next line.
return <Box className={classes.myCustomClass} padding={theme.spacing(4)} />
}
}
export default withStyles(styles, { withTheme: true })(myComponent)
If you pass { withTheme: true } option to withStyles HOC, you'll get the theme variable injected as a prop also.
If you have other HOCs (e.g. Redux's connect, Router, etc) applied to your component, you may use it like this:
export default withStyles(styles, { withTheme: true })(
withRouter(connect(mapStateToProps)(myComponent))
)
A more comprehensive explanation for this topic could be found in this article: Using Material UI theme variable in React Function and Class Components.
Use withTheme HOC
modified example from docs
import { withTheme } from '#material-ui/core/styles';
class DeepChildRaw
{
/*...*/
render()
{
return <span>{`spacing ${this.props.theme.spacing}`}</span>;
}
}
const DeepChild = withTheme(DeepChildRaw);
if are working with Class Components, you can use like here ;)
import React from 'react';
import Routes from './Routes';
import '../custom.css';
import { BrowserRouter } from 'react-router-dom';
import { MuiThemeProvider, createTheme } from '#material-ui/core/styles';
const theme = createTheme({
palette: {
primary: {
main: '#fff'
},
secondary: {
main: '#351436'
}
}
});
class App extends React.Component {
render() {
return (
<div className="App">
<MuiThemeProvider theme={theme}>
<BrowserRouter>
<Routes />
</BrowserRouter>
</MuiThemeProvider>
</div>
)
}
}
export default App;
I'm trying to use styled components to personalize a header component from semantic-ui-react.
I try:
header.jsx:
import React from 'react';
import { Header } from 'semantic-ui-react';
import TipografiaHeader from './cabecalho.css'
const HeaderPages = () => (
<div>
<TipografiaHeader as='h2'
textAlign='center'
>
Workout Log
</TipografiaHeader>
</div>
)
export default HeaderPages
cabecalho.jss.js:
import styled from "styled-components";
import { Header } from 'semantic-ui-react';
const TipografiaHeader = styled.Header`
background: red;
`;
export { TipografiaHeader };
But in the console i'm receiving:
Uncaught TypeError: _styledComponents2.default.Header is not a
function
The syntax for styled.element can only be used for HTML elements. For eg:
styled.h1``
For styling a custom component, the syntax to be used is:
styled(Header)``
Note that this custom component requires the className prop to be passed into the DOM element underneath for this to work.
Docs
Within my React+StyledComponent app, I have a theme file like so:
theme.js:
const colors = {
blacks: [
'#14161B',
'#2E2E34',
'#3E3E43',
],
};
const theme = {
colors,
};
export default theme;
Currently, I can easily use these colors to style my components like so:
const MyStyledContainer = styled.div`
background-color: ${(props) => props.theme.colors.blacks[1]};
`;
The problem is, how do I pass blacks[1] to a Component as the prop of the color to use like so:
<Text color="black[1]">Hello</Text>
Where Text.js is:
const StyledSpan = styled.span`
color: ${(props) => props.theme.colors[props.color]};
`;
const Text = ({
color,
}) => {
return (
<StyledSpan
color={color}
>
{text}
</StyledSpan>
);
};
Text.propTypes = {
color: PropTypes.string,
};
export default Text;
Currently the above is silently failing and rending the following in the DOM:
<span class="sc-brqgn" color="blacks[1]">Hello</span>
Any ideas on how I can get this to work? Thank you
EDIT: Updated to use styled-components withTheme HOC
New answer
You could wrap the component rendering <Text> in the higher order component (HOC) withTheme provided by styled-components. This enables you to use the theme given to the <ThemeProvider> directly in the React component.
Example (based on the styled-components docs):
import React from 'react'
import { withTheme } from 'styled-components'
import Text from './Text.js'
class MyComponent extends React.Component {
render() {
<Text color={this.props.theme.colors.blacks[1]} />;
}
}
export default withTheme(MyComponent)
Then you could do
const MyStyledContainer = styled.div`
background-color: ${(props) => props.color};
`;
Old answer
You could import the theme where you render and pass <Text color={theme.blacks[1]} />.
import theme from './theme.js'
...
<Text color={theme.colors.blacks[1]} />
Then you could do
const MyStyledContainer = styled.div`
background-color: ${(props) => props.color};
`;
You can use defaultProps
import PropTypes from 'prop-types'
MyStyledContainer.defaultProps = { theme }
App.js
App gets theme and passes color to Text
import React, { Component } from 'react'
import styled from 'styled-components'
const Text = styled.div`
color: ${props => props.color || 'inherit'}
`
class App extends Component {
render() {
const { theme } = this.props
return (
<Text color={theme.colors.black[1]} />
)
}
}
export default App
Root.js
Root component passes theme to entire application.
import React, { Component } from 'react'
import { ThemeProvider } from 'styled-components'
import theme from './theme'
import App from './App'
class Root extends Component {
render() {
return (
<ThemeProvider theme={theme}>
<App />
</ThemeProvider>
)
}
}
export default Root
If you're using functional components in React and v4.x and higher styled-components, you need to leverage useContext and styled-components' ThemeContext. Together, these allow you to use your theme settings inside of components that aren't styled-components.
import { useContext } from 'react'
import { ThemeContext } from 'styled-components'
export default function MyComponent() {
// place ThemeContext into a context that is scoped to just this component
const themeProps = useContext(ThemeContext)
return(
<>
{/* Example here is a wrapper component that needs sizing params */}
{/* We access the context and all of our theme props are attached to it */}
<Wrapper maxWidth={ themeProps.maxWidth }>
</Wrapper>
</>
)
}
Further reading in the styled-components docs: https://styled-components.com/docs/advanced#via-usecontext-react-hook