Answer a question

In Vue 2 one could use

Vue.config.productionTip = false;

to turn off the productionTip warning on development builds. However it doesn't work with Vue 3:

Vue.config && (Vue.config.productionTip = false);

const App = {
  data: () => ({
    foo: 'bar'
  })
};
Vue.createApp(App).mount('#app');

<script src="https://unpkg.com/vue@next"></script>
<div id="app">{{ foo }}</div>

Answers

According to documentation it was removed.

So, if you want to get rid of the warning in your Vue 3 Stack Overflow answers (without disabling the console in the snippet), you have to replace src="https://unpkg.com/vue" with a global.prod CDN build: (i.e: src="https://unpkg.com/vue/dist/vue.global.prod.js"):

const App = {
  data: () => ({
    foo: 'bar'
  })
};
Vue.createApp(App).mount('#app');

<script src="https://unpkg.com/vue/dist/vue.global.prod.js"></script>
<div id="app">{{ foo }}</div>