Tips for incorporating multiple classes in Material UI by utilizing the classes props

When using the css-in-js technique to apply classes to a react component, how can I add multiple classes?

Below is an example of the classes variable:

const styles = theme => ({
  container: {
    display: 'flex',
    flexWrap: 'wrap'
  },
  spacious: {
    padding: 10
  },
});

Here is how I implemented it:

return (<div className={ this.props.classes.container }>)

The approach above works fine, but is there a way to include both classes without relying on the classNames npm package? Is something like this possible:

<div className={ this.props.classes.container + this.props.classes.spacious}>

Answer №1

To include multiple classes in React JSX, you can utilize string interpolation:

<div className={`${this.props.styles.wrapper} ${this.props.styles.large}`}>

Answer №2

If you're looking to streamline your class management in React, consider utilizing clsx. This package was featured prominently in the Material-UI buttons examples.

To get started, simply follow these steps:

npm install --save clsx

Next, include it within your component file:

import clsx from 'clsx';

Finally, apply the imported function to your component:

<div className={ clsx(classes.container, classes.spacious)}>

Answer №3

If you need to style your elements dynamically, try installing the following package:

https://github.com/JedWatson/classnames

You can use it in the following ways:

classNames('foo', 'bar'); // => 'foo bar'
classNames('foo', { bar: true }); // => 'foo bar'
classNames({ 'foo-bar': true }); // => 'foo-bar'
classNames({ 'foo-bar': false }); // => ''
classNames({ foo: true }, { bar: true }); // => 'foo bar'
classNames({ foo: true, bar: true }); // => 'foo bar'

// Handles various argument types
classNames('foo', { bar: true, duck: false }, 'baz', { quux: true }); // => 'foo bar baz quux'

// Ignores other falsy values
classNames(null, false, 'bar', undefined, 0, 1, { baz: null }, ''); // => 'bar 1'

Answer №4

If you want to apply multiple classes to a component, simply wrap the classes you want to apply within classNames.

For instance, in your specific case, your code should resemble the following:

import classNames from 'classnames';

const styles = theme => ({
  container: {
    display: "flex",
    flexWrap: "wrap"
  },
  spacious: {
    padding: 10
  }
});

<div className={classNames(classes.container, classes.spacious)} />

Ensure that you import classNames properly!

Check out Material UI documentation for an example of using multiple classes in one component to customize a button.

Answer №5

If you prefer, you can utilize the extend feature by default with the jss-extend plugin:

const styles = theme => ({
  wrapper: {
    display: 'flex',
    flexDirection: 'row'
  },
  extendedWrapper: {
    extend: 'wrapper',
    margin: 20
  },
});

// ...
<div className={ this.props.classes.extendedWrapper }>

Answer №6

To incorporate several string classes, variable classes, or props classes simultaneously, you can use the following syntax:

className={`${classes.myClass}  ${this.props.classes.myClass2} MyStringClass`}

This allows you to add three different classes at once.

Answer №7

Here is a potential solution for your issue:

const customStyles = theme => ({
 layout: {
  display: 'grid',
  gridTemplateColumns: '1fr 1fr'
},
 largeSpacing: {
  padding: 15
},
});

Within the react component, implement it like this:

<div className={`${customStyles.layout} ${customStyles.largeSpacing}`}>

Answer №8

Absolutely, with jss-composes you can achieve the following:

const styles = theme => ({
 container: {
  display: 'flex',
  flexWrap: 'wrap'
},
 spacious: {
  composes: '$container',
  padding: 10
},
});

You can simply apply the styles by using classes.spacious.

Answer №9

When utilizing the <a href="https://www.npmjs.com/package/classnames" rel="nofollow noreferrer">classnames</a> package, it can be applied in a more advanced manner:</p>

<pre><code>import classNames from 'classnames';

var arr = ['b', { c: true, d: false }];
classNames('a', arr); // => 'a b c'

let buttonType = 'primary';
classNames({ [`btn-${buttonType}`]: true }); // => 'btn-primary'

Answer №10

Here is a helpful method you can utilize:

import classNames from 'classnames';
    
return <div className={classNames(styles.container, 'roomy')} />

This resource may provide more insight.

Answer №11

If you want to apply two classes in Material UI, here's how you can do it:

import classNames from "classnames";
import { makeStyles } from "@material-ui/core/styles";

const useStyles = makeStyles({
  container: {
    display: 'flex',
    flexWrap: 'wrap',
  },
  spacious: {
    padding: 10,
  },
});

Here is an example code snippet:


 <div className={classNames(classes.container, classes.spacious)}>
      Try this one!
 </div>

To add two classes using the comparison operator in Material UI, follow these steps:

If you need to define one or two classes using the comparison operator, use the following code:


import classNames from "classnames";
import { makeStyles } from "@material-ui/core/styles";

const useStyles = makeStyles({
  maineButton: {
   borderRadius: "10px",
   minWidth: "80px",
   border: "1x solid #dcdcdc",
  },
  selectedButton: {
    border: "1x solid #3f51b5",
  },
});

Below is a sample code snippet that demonstrates how to achieve this:

const [selected, setSelected] = useState(0);

You can use the following code to set two classes if the condition is met:

{data?.map((el, index) => (
   <ButtonBase 
     className={classNames(
        classes.maineButton, 
        index === selected && classes.selectedButton
        )}
     onClick{()=> setSelected(index)}
   >
     {el.text}
   </ButtonBase>
))}

If the condition is not met, only one class will be applied:

className={classNames(classes.maineButton)}

Answer №12

To add multiple class names to your element, you can utilize arrays.

For example, if this.props.classes contains ['container', 'spacious'], like:

this.props.classes = ['container', 'spacious'];

You can simply assign it to the div as:

<div className = { this.props.classes.join(' ') }></div>

Resulting in:

<div class='container spacious'></div>

Answer №13

You can easily achieve this with destructuring in an effortless manner, as JavaScript objects allow for it:

const style = {
  width: '100px',
  whiteSpace: 'nowrap',
  overflow: 'hidden',
  textOverflow: 'ellipsis',
};
email: {
    color: '#747474',
    ...style,
  },

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