transition-style/src/postcss.config.js

just add water clip-path mask transitions

/**
 * Copyright 2020 Google Inc. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *     http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

const postcssImport = require('postcss-import')
const cssnano       = require('cssnano')
const autoprefixer  = require('autoprefixer')

module.exports = {
  plugins: [
    postcssImport({
      path: 'src/index.css',
    }),
    autoprefixer(),
    cssnano({
      preset: 'default'
    }),
  ]
}