@lwc/style-compiler/dist/commonjs/transform.js

Transform style sheet to be consumed by the LWC engine

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
/*
 * Copyright (c) 2018, salesforce.com, inc.
 * All rights reserved.
 * SPDX-License-Identifier: MIT
 * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
 */
const postcss_1 = __importDefault(require("postcss"));
const cssnano_1 = __importDefault(require("cssnano"));
const serialize_1 = __importDefault(require("./serialize"));
const lwc_postcss_plugin_1 = __importDefault(require("./lwc-postcss-plugin"));
const CSS_NANO_CONFIG = {
    preset: ['default'],
    // Disable SVG compression, since it prevent the compiler to be bundle by webpack since
    // it dynamically require the svgo package: https://github.com/svg/svgo
    svgo: false,
    // Disable zindex normalization, since it only works when it works only if the rules
    // css file contains all the selectors applied on the page.
    zindex: false,
};
function transform(src, id, config = {}) {
    if (src === '') {
        return { code: 'export default undefined' };
    }
    const allowDefinition = !config.customProperties || config.customProperties.allowDefinition;
    const collectVarFunctions = Boolean(config.customProperties && config.customProperties.resolverModule);
    const minify = config.outputConfig && config.outputConfig.minify;
    const plugins = [
        lwc_postcss_plugin_1.default({
            customProperties: { allowDefinition, collectVarFunctions },
        })
    ];
    if (minify) {
        // We are unshifting to ensure minification runs before lwc
        // This is important because we clone declarations that can't be mangled by the minifier.
        plugins.unshift(cssnano_1.default(CSS_NANO_CONFIG));
    }
    const result = postcss_1.default(plugins).process(src, { from: id });
    return { code: serialize_1.default(result, config) };
}
exports.transform = transform;
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