index.js

const Vue = require('vue')
const renderer = require('vue-server-renderer').createRenderer()

// Would expect this to render the v-show="true" div without any style attribute
// Instead, it renders with style="display:;"
const app = new Vue({
  template: '<div>\n' +
            '  <p>v-show=true</p>\n' +
            '  <p v-show="true">v-show=true</p>\n' +
            '  <p v-show="false">v-show=false</p>' +
            '</div>',
})
renderer.renderToString(app, (err, html) => {
  if (err) throw err
  console.log(html)
})