postcss.config.js

const tailwindcss = require("tailwindcss");
const autoprefixer = require("autoprefixer");
const purgecss = require("@fullhuman/postcss-purgecss");

module.exports = {
  plugins: [
    tailwindcss("./tailwind.config.js"),
    autoprefixer({
      add: true,
      grid: true
    }),
    //Only add purgecss in production
    process.env.NODE_ENV === "production"
      ? purgecss({
          content: ["./public/**/*.html", "./src/**/*.vue"],
          defaultExtractor: content => {
            const contentWithoutStyleBlocks = content.replace(
              /<style[^]+?<\/style>/gi,
              ""
            );
            return (
              contentWithoutStyleBlocks.match(
                /[A-Za-z0-9-_/:]*[A-Za-z0-9-_/]+/g
              ) || []
            );
          },
          whitelist: [
            "swiper-container",
            "section_slider",
            "swiper-container-initialized",
            "swiper-container-horizontal",
            "swiper-container-android",
            "swiper-slide",
            "swiper-wrapper",
            "slide",
            "v-select",
            "vs--searchable",
            "vs1__combobox",
            "vs__dropdown-toggle",
            "vs__selected-options",
            "vs__search",
            "vs__actions",
            "vs__clear",
            "vs__open-indicator",
            "vs__spinner",
            "v-select",
            "vs--single",
            "vs--searchable",
            "vs__dropdown-menu",
            "multiselect",
            "multiselect__tags",
            "multiselect__select",
            "multiselect__tags-wrap",
            "multiselect__spinner",
            "multiselect__input",
            "multiselect__placeholder",
            "multiselect__content-wrapper",
            "multiselect__option",
            "multiselect__option--highlight",
            "multiselect__element",
            "multiselect__content"
          ],
          whitelistChildren: ["v-select", "multiselect", "multiselect__tags", "v-select", " vs--single", "vs--searchable"],
          whitelistPatterns: [
            /-(leave|enter|appear)(|-(to|from|active))$/,
            /^(?!cursor-move).+-move$/,
            /^router-link(|-exact)-active$/
          ]
        })
      : ""
  ]
};