joyent-portal/packages/ui-toolkit/src/baseline/index.js

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import unitcalc from 'unitcalc';
import styled from 'styled-components';
import camelCase from 'camel-case';
const sides = ['top', 'right', 'bottom', 'left'];
const unitProps = (() => {
const sided = rule => sides.map(side => `${rule}-${side}`);
const measures = ['margin', 'padding'].reduce(
(props, rule) => [...props, rule, ...sided(rule)],
[]
);
return sides.reduce((acc, side) => [...acc, `border-${side}-width`], [
'border',
...measures
]);
})();
const unitsFromProps = props =>
unitProps
.filter(measure => props[camelCase(measure)])
.map(
measure => `
${measure}: ${unitcalc(props[camelCase(measure)])};
`
)
.join(';\n');
export default Component => styled(Component)`
${unitsFromProps}
`;