vite.config.lib.js

/* eslint-env es6 */
import { resolve } from "path";
import { defineConfig } from "vite";
import createVuePlugin from "@vitejs/plugin-vue";
import cssInjectedByJsPlugin from "vite-plugin-css-injected-by-js";
import svgLoader from "vite-svg-loader";
import { readFileSync } from "fs";

// Read version from package.json
const packageJson = JSON.parse(
  readFileSync(resolve(__dirname, "package.json"), "utf-8"),
);

export default defineConfig({
  build: {
    // https://vitejs.dev/guide/build.html#library-mode
    lib: {
      entry: resolve(__dirname, "src/core.ts"),
      // https://vitejs.dev/config/build-options.html#build-lib
      // the exposed global variable and is required when formats includes 'umd' or 'iife'.
      name: "ZenUML",
      fileName: "zenuml",
    },
    rollupOptions: {
      output: [
        {
          format: "esm",
          sourcemap: true,
          // https://rollupjs.org/guide/en/#outputentryfilenames
          // It will use the file name in `build.lib.entry` without extension as `[name]` if `[name].xxx.yyy` is provided.
          // So we hard code as zenuml. We may consider rename `core.ts` to `zenuml.ts`.
          // If this field is not provided, result with be ${build.lib.filename}.esm.js.
          // Mermaid's build.ts output hardcoded esm file as '.mjs', thus we need this config.
          entryFileNames: `zenuml.esm.mjs`,
        },
        {
          name: "zenuml", //  it is the global variable name representing your bundle. https://rollupjs.org/guide/en/#outputname
          format: "umd",
          sourcemap: true,
          entryFileNames: `zenuml.js`,
        },
      ],
    },
  },
  resolve: {
    alias: {
      vue: "@vue/compat",
      "@": resolve(__dirname, "./src"),
    },
  },
  plugins: [
    svgLoader(),
    createVuePlugin({
      template: {
        compilerOptions: {
          compatConfig: {
            MODE: 2,
          },
        },
      },
    }),
    cssInjectedByJsPlugin(),
  ],
  define: {
    "process.env.NODE_ENV": '"production"',
    "process.env.VITE_VERSION": JSON.stringify(packageJson.version),
  },
});