Use CSS-in-JS

linaria

There is a common CSS-in-JS solution in the React community: styled-components。Unfortunately, however, styled-components uses the <style> tag to dynamically control styles, and there is no similar solution in mini program. But we can achieve the same functionality with linaria, linaria mainly provides the following features.

• API that approximates styled-components
• TypeScript support
• Zero runtime

Using linaria is also very simple, first installing the dependencies via NPM:

$ npm i linaria

Next, configure babel.config.js in the project root directory:

babel.config.js

module.exports = {
  presets: [
    ['taro', {
      framework: 'react',
      ts: true
    }],
    'linaria/babel' // Add to babel-preset
  ]
}

After that, configure config/index.js

config/index.js

const config = {
  mini: {
    webpackChain(chain, webpack) {
      // linaria/loader options refer to https://github.com/callstack/linaria/blob/master/docs/BUNDLERS_INTEGRATION.md#webpack
      chain.module
        .rule('script')
        .use('linariaLoader')
        .loader('linaria/loader')
        .options({
          sourceMap: process.env.NODE_ENV !== 'production',
        })
    }
  },
  h5: {
    webpackChain(chain, webpack) {
      chain.module
        .rule('script')
        .use('linariaLoader')
        .loader('linaria/loader')
        .options({
          sourceMap: process.env.NODE_ENV !== 'production',
        })
    }
  }
}

Finally, create a new linaria.config.js in the root of the project

linaria.config.js

// linaria configuration details: https://github.com/callstack/linaria/blob/master/docs/CONFIGURATION.md#options
module.exports = {
  rules: [
    {
      action: require("linaria/evaluators").shaker,
    },
    {
      test: /node_modules[\/\\](?!@tarojs)/,
      action: "ignore"
    }
  ]
}

In the business code we can use it like this.

JavaScript

import React from 'react'
import { View } from '@tarojs/components'
import { styled } from 'linaria/react'

const Title = styled(View)`
  color: ${props => props.color}
`;

const Index = () => {
  return <Title color='red'>
    Hello World!
  </Title>
}

export default Index

TypeScript

import React from 'react'
import { View } from '@tarojs/components'
import { styled } from 'linaria/react'

const Title = styled(View)<{ color: string }>`
  color: ${props => props.color}
`;

const Index: React.FC = () => {
  return <Title color='red'>
    Hello World!
  </Title>
}

export default Index

Fower

The community has another option Fower，Documentation