rollup-config.js

import rollupGitVersion from 'rollup-plugin-git-version'
import json from 'rollup-plugin-json'
import babel from 'rollup-plugin-babel';
import resolve from 'rollup-plugin-node-resolve';
import commonjs from '@rollup/plugin-commonjs';
import { string } from "rollup-plugin-string";

let release;

// Skip the git branch+rev in the banner when doing a release build
if (process.env.NODE_ENV === 'release') {
  release = true;
} else {
  release = false;
}

export default {
  input: 'src/rasterTileLayer.js',	// 入口文件
  output: [
    {
      file: 'dist/rasterTileLayer-src.js',	// 出口文件
      format: 'umd',	// 代码打包时的格式，这个格式可以前后端通用，除此之外还有其他格式：cjs，iife，es，amd, umd
      name: 'rasterTileLayer',	// 包的名字,
      sourcemap: true
    }
  ],
  legacy: true, // Needed to create files loadable by IE8
  plugins: [
    string({
      include: "src/shaders/*",
    }),
    release ? json() : rollupGitVersion(),
    resolve(),		//此插件可以将引用库中的文件进行打包
    commonjs(),
    babel({
      exclude: ['node_modules/**'],
    }),
  ]
};