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feat: support selectorDoubleRemList #21

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feat: support selectorDoubleRemList #21

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11 changes: 6 additions & 5 deletions src/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,7 @@ const defaultOpts = {
replace: true,
mediaQuery: false,
minPixelValue: 0,
selectorDoubleRemList: [],
};

const toFixed = (number, precision) => {
Expand All @@ -23,15 +24,15 @@ const toFixed = (number, precision) => {
};
const isObject = o => typeof o === 'object' && o !== null;

const createPxReplace = (rootValue, identifier, unitPrecision, minPixelValue) => (m, $1, $2) => {
const createPxReplace = (rootValue, identifier, unitPrecision, minPixelValue) => (m, $1, $2, doubleRem) => {
if (!$1) return m;
if (identifier && m.indexOf(identifier) === 0) return m.replace(identifier, '');
const pixels = parseFloat($1);
if (pixels < minPixelValue) return m;
// { px: 100, rpx: 50 }
const baseValue = isObject(rootValue) ? rootValue[$2] : rootValue;
const fixedVal = toFixed((pixels / baseValue), unitPrecision);

const double = doubleRem === true ? 2 : 1;
const fixedVal = toFixed((pixels * double / baseValue), unitPrecision);
return `${fixedVal}rem`;
};

Expand Down Expand Up @@ -100,8 +101,8 @@ export default postcss.plugin('postcss-plugin-px2rem', options => {
if (opts.propWhiteList.length && opts.propWhiteList.indexOf(_decl.prop) === -1) return;
// 5th check seletor black list
if (blacklistedSelector(opts.selectorBlackList, _decl.parent.selector)) return;

const value = _decl.value.replace(pxRegex, pxReplace);
const doubleRem = blacklistedSelector(opts.selectorDoubleRemList, _decl.parent.selector);
const value = _decl.value.replace(pxRegex, (m, $1, $2) => pxReplace(m, $1, $2, doubleRem));

// if rem unit already exists, do not add or replace
if (declarationExists(_decl.parent, _decl.prop, value)) return;
Expand Down
10 changes: 10 additions & 0 deletions test/index-test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,16 @@ import pxtorem from '../src/';
const basicCSS = '.rule { font-size: 15px }';

describe('px2rem', () => {
it('px to 2*rem,if .ant-*', () => {
const input = '.ant-abc { margin: 0 0 20px 20px; font-size: 32px; line-height: 1.2; letter-spacing: 1px; }';
const output = '.ant-abc { margin: 0 0 0.4rem 0.4rem; font-size: 0.64rem; line-height: 1.2; letter-spacing: 0.02rem; }';
const processed = postcss(pxtorem({
selectorDoubleRemList: [/.ant-/],
})).process(input).css;

expect(processed).toBe(output);
});

it('should work on the readme example', () => {
const input = 'h1 { margin: 0 0 20px 20px; font-size: 32px; line-height: 1.2; letter-spacing: 1px; }';
const output = 'h1 { margin: 0 0 0.2rem 0.2rem; font-size: 0.32rem; line-height: 1.2; letter-spacing: 0.01rem; }';
Expand Down