babel-plugin-headless-styled-components-px2vw v0.2.0

babel-plugin-headless-styled-components-px2vw

Babel plugin for convert px to vw units of styled-components.

1. Use postcss-px-to-viewport to process all css text in template strings.
2. Add a runtime px2vw function polyfill to process expression embedded in template strings when enable transformRuntime option.

Getting Started

Installation

Add via npm

$ npm install babel-plugin-headless-styled-components-px2vw --save-dev

or yarn

$ yarn add -D babel-plugin-headless-styled-components-px2vw

Configuration

babel.config.js:

module.exports = {
  plugins: [
    [
      'headless-styled-components-px2vw',
      {
        unitToConvert: 'px',
        unitPrecision: 5,
        minPixelValue: 0,
      },
    ],
  ],
};

or .babelrc:

{
  "plugins": [
    [
      "headless-styled-components-px2vw",
      {
        "unitToConvert": 'px',
        "unitPrecision": 5,
        "minPixelValue": 0
      }
    ]
  ]
}

Composition

It should be put before babel-plugin-styled-components

{
  "plugins": ["headless-styled-components-px2vw", "styled-components"]
}

see example

1. npm install
2. Typing: npm test to run unit tests
3. Typing: npm run build to compile src/index.jsx to dist/index-jsx.js

Options

The options of the plugin are based on some of the option of postcss-px-to-viewport, but not all options properties work, such as mediaQuery、landscape

Demo

Transform Runtime

If enabled transformRuntime option, all supported expressions embedded in template strings are processed as follows:

Note: Only expression that end with px will be processed.

FunctionExpression

source code:

import styled from 'styled-components';

export const FunctionExpression = styled.button`
  height: ${function (props) {
    return props.height;
  }}px;
`;

compiled:

import styled from 'styled-components';

export const FunctionExpression = styled.button`
  height: ${(...args) =>
    _px2rem(function (props) {
      return props.height;
    }, ...args)};
`;

function _px2rem(input, ...args) {
  if (typeof input === 'function') return _px2rem(input(...args), ...args);
  var value = typeof input === 'string' ? parseFloat(input) : typeof input === 'number' ? input : 0;
  var pixels = Number.isNaN(value) ? 0 : value;
  if (Math.abs(pixels) < 0) return pixels + 'px';
  var mul = Math.pow(10, 5 + 1);
  return (Math.round(Math.floor(((pixels * 1) / 100) * mul) / 10) * 10) / mul + 'rem';
}

ArrowFunctionExpression

source code:

export const ArrowFunction = styled.input.attrs((props) => ({
  type: 'password',
  size: props.size || '16px',
  width: props.width || 100,
}))`
  color: palevioletred;
  font-size: 14px;
  border: 1px solid palevioletred;
  border-radius: 8px; /* setting propList: ['*', '!border-*'] */
  width: ${(props) => props.width}px; /* PropertyAccess Body */
  height: ${() => height}px; /* Identifier Body */
  line-height: ${() => '44'}px; /* StringLiteral Body */
  margin: ${() => 32}px; /* NumericLiteral Body */
  padding: ${(props) => props.size};
`;

export const ArrowFunctionWithBlockBody = styled.button`
  width: ${(props) => {
    if (props.width) {
      return props.width;
    } else {
      return 0;
    }
  }}px; /* Block Body */

  ${(props) => (props.disabled ? 'height: 400px' : 'height: 200px')}
`;
export const ArrowFunctionWithBinaryBody = styled.button`
  ${(props) =>
    props.disabled &&
    `
      width: 200px;
      font-size: 14px;
    `};
  height: ${(props) => !props.disabled && props.height}px; /* ArrowFunction with a LogicalExpression Body */
  width: ${() => 44 + 50}px; /* ArrowFunction with a BinaryExpression Body */
`;
export const ArrowFunctionWithConditionalBody = styled.button`
  height: ${(props) => (props.height ? height : 100)}px; /* ArrowFunction with a ConditionalExpression Body */
`;

compiled:

export const ArrowFunction = styled.input.attrs((props) => ({
  type: 'password',
  size: props.size || '16px',
  width: props.width || 100,
}))`
  color: palevioletred;
  font-size: 1.86667vw;
  border: 1px solid palevioletred;
  border-radius: 8px; /* setting propList: ['*', '!border-*'] */
  width: ${(props) => _px2vw(props.width)}; /* PropertyAccess Body */
  height: ${() => _px2vw(height)}; /* Identifier Body */
  line-height: ${() => _px2vw('44')}; /* StringLiteral Body */
  margin: ${() => _px2vw(32)}; /* NumericLiteral Body */
  padding: ${(props) => props.size};
`;

export const ArrowFunctionWithBlockBody = styled.button`
  width: ${(props) =>
    _px2vw(() => {
      if (props.width) {
        return props.width;
      } else {
        return 0;
      }
    })}; /* Block Body */

  ${(props) => (props.disabled ? 'height: 53.33333vw' : 'height: 26.66667vw')}
`;
export const ArrowFunctionWithBinaryBody = styled.button`
  ${(props) =>
    props.disabled &&
    `
      width: 26.66667vw;
      font-size: 1.86667vw;
    `};
  height: ${(props) => _px2vw(!props.disabled && props.height)}; /* ArrowFunction with a LogicalExpression Body */
  width: ${() => _px2vw(44 + 50)}; /* ArrowFunction with a BinaryExpression Body */
`;
export const ArrowFunctionWithConditionalBody = styled.button`
  height: ${(props) =>
    props.height ? _px2vw(height) : _px2vw(100)}; /* ArrowFunction with a ConditionalExpression Body */
`;

ConditionalExpression

source code

export const ConditionalExpression = function ({ fontSize, spacing } = {}) {
  const StyledButton = styled.button`
    font-size: ${typeof fontSize === 'number' ? fontSize : (props) => props.theme.fontSize}px;
    ${spacing
      ? `
     padding: 8px 16px 0 32px;
     margin: 16px 0;
  `
      : ''}
  `;

  return <StyledButton />;
};
export const ConditionalExpressionWhenTrue = function ({ fontSize } = {}) {
  const StyledButton = styled.button`
    font-size: ${typeof fontSize !== 'number' ? (props) => props.theme.fontSize : fontSize}px;
  `;

  return <StyledButton />;
};
export const ConditionalExpressionWhenFalse = function ({ fontSize } = {}) {
  const StyledButton = styled.button`
    font-size: ${typeof fontSize === 'number' ? fontSize : 16}px;
  `;

  return <StyledButton />;
};

compiled:

export const ConditionalExpression = function ({ fontSize, spacing } = {}) {
  const StyledButton = styled.button`
    font-size: ${typeof fontSize === 'number' ? _px2vw(fontSize) : (props) => _px2vw(props.theme.fontSize)};
    ${spacing
      ? `
     padding: 1.06667vw 2.13333vw 0 4.26667vw;
     margin: 2.13333vw 0;
  `
      : ''}
  `;
  return /*#__PURE__*/ React.createElement(StyledButton, null);
};
export const ConditionalExpressionWhenTrue = function ({ fontSize } = {}) {
  const StyledButton = styled.button`
    font-size: ${typeof fontSize !== 'number' ? (props) => _px2vw(props.theme.fontSize) : _px2vw(fontSize)};
  `;
  return /*#__PURE__*/ React.createElement(StyledButton, null);
};
export const ConditionalExpressionWhenFalse = function ({ fontSize } = {}) {
  const StyledButton = styled.button`
    font-size: ${typeof fontSize === 'number' ? _px2vw(fontSize) : _px2vw(16)};
  `;
  return /*#__PURE__*/ React.createElement(StyledButton, null);
};
const condition = false;

Other Expressions

Identifier, CallExpression, BinaryExpress, StringLiteral, NumericLiteral, MemberExpression, LogicalExpression...

Disable transformRuntime (default)

If disable transformRuntime option, all supported expressions embedded in template strings are not processed as follows:

import styled, { css, createGlobalStyle, keyframes } from 'styled-components';

const mixins = css`
  padding: 0 18px;
  margin: 16px 32px 16px 32em;
  padding-top: 10px;
  padding-bottom: 10px;
  border: 2px solid black;
`;

const Animation = keyframes`
from {
transform: translateX(100px);
}

to {
transform: translateX(-100px);
}
`;

const Input = styled.input.attrs((props) => ({
  type: 'password',
  size: props.size || '1em',
}))`
  color: palevioletred;
  font-size: 14px;
  border: 1px solid palevioletred;
  border-radius: 8px;
  margin: ${(props) => props.size};
  padding: ${(props) => props.size};
`;

const GlobalStyle = createGlobalStyle`
section {
font-size: 16px;
}

html body {
font-size: 18px;
section {
font-size: 16px
}
}
`;

const BlockButton = styled.button`
  ${mixins};
  display: block;
  width: 100%;
  height: 96px;
  line-height: 96px;
`;

const InlineButton = styled.button`
  ${mixins};
  display: inline;
  width: ${(props) => props.width}px;
  height: 96px;
  line-height: 96px;
`;

const ExtendedButton = styled(InlineButton)`
  width: 120px;
  height: 32px;
  line-height: 32px;
  font-size: 14px;
`;

const SizeableButton = styled.button(
  (props) =>
    ` display: inline; width: ${props.width}px; height: ${props.height}px; line-height: ${props.height}px; font-size: 16px;`,
);

import styled, { css, createGlobalStyle, keyframes } from 'styled-components';
const mixins = css`
  padding: 0 2.4vw;
  margin: 2.133vw 4.267vw 2.133vw 32em;
  padding-top: 1.333vw;
  padding-bottom: 1.333vw;
  border: 0.267vw solid black;
`;
const Animation = keyframes`
  from {
    transform: translateX(13.333vw);
  }

  to {
    transform: translateX(-13.333vw);
  }
`;
const Input = styled.input.attrs((props) => ({
  type: 'password',
  size: props.size || '1em',
}))`
  color: palevioletred;
  font-size: 1.867vw;
  border: 1px solid palevioletred;
  border-radius: 8px;
  margin: ${(props) => props.size};
  padding: ${(props) => props.size};
`;
const GlobalStyle = createGlobalStyle`
  section {
      font-size: 2.133vw;
  }

  html body {
    font-size: 2.4vw;
    section {
      font-size: 2.133vw
    }
  }
`;
const BlockButton = styled.button`
  ${mixins};
  display: block;
  width: 100%;
  height: 12.8vw;
  line-height: 12.8vw;
`;
const InlineButton = styled.button`
  ${mixins};
  display: inline;
  width: ${(props) => props.width}px;
  height: 12.8vw;
  line-height: 12.8vw;
`;
const ExtendedButton = styled(InlineButton)`
  width: 16vw;
  height: 4.267vw;
  line-height: 4.267vw;
  font-size: 1.867vw;
`;
const SizeableButton = styled.button(
  (props) => `
  display: inline;
  width: ${props.width}px;
  height: ${props.height}px;
  line-height: ${props.height}px;
  font-size: 2.133vw;
`,
);