ui

app/code/node_modules/laravel-mix/src/PostCssPluginsFactory.js

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+module.exports = class PostCssPluginsFactory {
+    /**
+     * Create a new instance.
+     * @param {import('./Mix.js')} context
+     */
+    constructor(context) {
+        this.context = context;
+
+        /** @type {import('postcss').AcceptedPlugin[]} */
+        this.plugins = [];
+    }
+
+    /**
+     * Load all relevant PostCSS plugins.
+     *
+     * @param {import('postcss').AcceptedPlugin[] | undefined} plugins
+     */
+    load(plugins = []) {
+        this.loadGlobalPlugins();
+        this.loadLocalPlugins(plugins);
+        this.loadAutoprefixer();
+        this.loadCssNano();
+
+        return this.plugins;
+    }
+
+    /**
+     * Load the user's postcss.config.js file, if any.
+     *
+     * @deprecated postcss-loader already does this on its own
+     */
+    loadConfigFile() {
+        let postcssrc = require('postcss-load-config');
+
+        try {
+            this.plugins = [...this.plugins, ...postcssrc.sync().plugins];
+        } catch (e) {
+            // No postcss.config.js file exists.
+        }
+    }
+
+    /**
+     * Load any global postcss plugins that have been passed to Mix.
+     */
+    loadGlobalPlugins() {
+        if (this.context.config.postCss && this.context.config.postCss.length) {
+            this.plugins = [...this.plugins, ...this.context.config.postCss];
+        }
+    }
+
+    /**
+     * Load any postcss plugins that were passed to the Mix command.
+     *
+     * @param {import('postcss').AcceptedPlugin[] | undefined} plugins
+     */
+    loadLocalPlugins(plugins) {
+        if (plugins && plugins.length) {
+            this.plugins = [...this.plugins, ...plugins];
+        }
+    }
+
+    /**
+     * Add autoprefixer to the plugins list.
+     */
+    loadAutoprefixer() {
+        if (this.context.config.autoprefixer) {
+            this.plugins.push(require('autoprefixer')(this.context.config.autoprefixer));
+        }
+    }
+
+    /**
+     * Add CSSNano to the plugins list.
+     */
+    loadCssNano() {
+        if (this.context.config.production && this.context.config.cssNano !== false) {
+            this.plugins.push(
+                require('cssnano')({
+                    preset: ['default', this.context.config.cssNano]
+                })
+            );
+        }
+    }
+};