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Chi Vinh Le
82 lines
2.7 KiB
JavaScript
82 lines
2.7 KiB
JavaScript
// Allow importing typescript files.
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require("ts-node/register");
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const kebabCase = require("lodash/kebabCase");
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const mapKeys = require("lodash/mapKeys");
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const mapValues = require("lodash/mapValues");
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const pickBy = require("lodash/pickBy");
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const flat = require("flat");
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const paths = require("./paths");
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const autoprefixer = require("autoprefixer");
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const postcssFontMagician = require("postcss-font-magician");
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const postcssFlexbugsFixes = require("postcss-flexbugs-fixes");
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const postcssVariables = require("postcss-css-variables");
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const postcssPresetEnv = require("postcss-preset-env");
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const postcssNested = require("postcss-nested");
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const postcssImport = require("postcss-import");
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const postcssPrependImports = require("postcss-prepend-imports");
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const postcssAdvancedVariables = require("postcss-advanced-variables");
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delete require.cache[paths.appThemeVariables];
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const variables = require(paths.appThemeVariables).default;
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const flatKebabVariables = mapKeys(
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mapValues(flat(variables, { delimiter: "-" }), v => v.toString()),
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(_, k) => kebabCase(k)
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);
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// These are the default css standard variables.
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const cssVariables = pickBy(
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flatKebabVariables,
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(v, k) => !k.startsWith("breakpoints-")
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);
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// These are sass style variables used in media queries.
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const mediaQueryVariables = mapValues(
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pickBy(flatKebabVariables, (v, k) => k.startsWith("breakpoints-")),
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// Add unit to breakpoints.
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// Add 1 to support mobile first approach where we start
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// with the smallest screen and gradually add styling for the
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// next bigger screen. This is realized using `min-width` without
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// ever using `max-width`.
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v => `${Number.parseInt(v) + 1}px`
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);
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module.exports = {
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// Necessary for external CSS imports to work
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// https://github.com/facebookincubator/create-react-app/issues/2677
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ident: "postcss",
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plugins: [
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// This allows us to define dynamic css variables.
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postcssPrependImports({
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path: "",
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files: [paths.appThemeVariablesCSS],
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}),
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// Needed by above plugin.
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postcssImport(),
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// Support nesting.
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postcssNested(),
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// Sass style variables to be used in media queries.
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postcssAdvancedVariables({ variables: mediaQueryVariables }),
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// CSS standard variables for everything else.
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postcssVariables({
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variables: cssVariables,
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}),
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// Provides a modern CSS environment.
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postcssPresetEnv(),
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// Does all the font handling logic.
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postcssFontMagician(),
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// Fix known flexbox bugs.
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postcssFlexbugsFixes,
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// Vendor prefixing.
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autoprefixer({
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browsers: [
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">1%",
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"last 4 versions",
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"Firefox ESR",
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"not ie < 9", // React doesn't support IE8 anyway
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],
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flexbox: "no-2009",
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}),
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],
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};
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