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styled-is

Flag utility for styled-components

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styled-is

npm License: MPL 2.0 standard-readme compliant Greenkeeper badge

David David

Flag utility for styled-components.

Table of Contents

Install

yarn add styled-is

Usage

is, isNot, isOr, isSomeNot are used for boolean props and can check one or more props at a time is(prop1, prop2, ...).

match is used to check the value of a prop match(prop, value).

Functions can also be passed to all of the above to allow for more complex prop-checking. Any functions passed in will automatically be called with the component's props. For example if you wanted to handle a button with only an icon differently for different sizes:

${match("size", "large")`
      font-size: 12px;
      ${props =>
        props.icon && !props.content
          ? `width: 3rem;`
          : `min-width: 6rem;`}
    `};

${match("size", "small")`
      font-size: 9px;
      ${props =>
        props.icon && !props.content
          ? `width: 1.5rem;`
          : `min-width: 3rem;`}
    `};

Examples

import is, { isNot, isOr, isSomeNot, match } from 'styled-is';
import styled from 'styled-components';

const Div = styled.div`
  display: block;
  opacity: 0;

  ${is('red')`
    background-color: red;
  `};

  ${is('blue')`
    background-color: blue;
  `};

  ${is('red', 'blue')`
    opacity: 1;
  `};

  ${is('left')`
    float: left;
  `};

  ${is('right')`
    float: right;
  `};

  ${isNot('left', 'right')`
    float: center;
  `};

  ${isOr('left', 'right')`
    position: relative;
  `};

  ${isSomeNot('red', 'left')`
    wat: 1;
  `};

  ${match('size', 'large')`
    height: 64px;
  `};

  ${is('green')`
    background-color: green;
    ${props => (props.size === 'small' ? `width: 3rem;` : `width: 6rem;`)}
  `};
`;
// display: block;
// opacity: 0;
// float: center;
// wat: 1;
<Div>

// display: block;
// opacity: 0;
// background-color: red;
// opacity: 1;
// float: center;
// wat: 1;
<Div red>

// display: block;
// opacity: 0;
// background-color: red;
// opacity: 1;
// float: left;
// position: relative;
<Div red left>

// display: block;
// opacity: 0;
// background-color: red;
// opacity: 1;
// float: left;
// position: relative;
// height: 64px;
<Div red left size='large'>

// display: block;
// opacity: 0;
// float: center;
// wat: 1;
// background-color: green;
// width: 6rem;
<Div green>

// display: block;
// opacity: 0;
// float: center;
// wat: 1;
// background-color: green;
// width: 3rem;
<Div green size='small'>

License

MPL-2.0

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Package last updated on 14 Apr 2019

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