ydd_front/mer_plat_admin/build/index.js

const { run } = require('runjs');
const chalk = require('chalk');
const config = require('../vue.config.js');
const rawArgv = process.argv.slice(2);
const args = rawArgv.join(' ');

if (process.env.npm_config_preview || rawArgv.includes('--preview')) {
  const report = rawArgv.includes('--report');

  run(`vue-cli-service build ${args}`);

  const port = 9526;
  const publicPath = config.publicPath;

  var connect = require('connect');
  var serveStatic = require('serve-static');
  const app = connect();

  app.use(
    publicPath,
    serveStatic('./dist', {
      index: ['index.html', '/'],
    }),
  );

  app.listen(port, function () {
    console.log(chalk.green(`> Preview at  http://localhost:${port}${publicPath}`));
    if (report) {
      console.log(chalk.green(`> Report at  http://localhost:${port}${publicPath}report.html`));
    }
  });
} else {
  run(`vue-cli-service build ${args}`);
}