---
title: "Level 3: Two children mount · Lifecycle Line-up · vuejs.school"
description: "App renders a Header and a Footer. Both are set up before either is mounted."
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> Index of every page on this site: [llms.txt](https://vuejs.school/llms.txt)

**Level 3 of 7 · siblings are set up first, mounted together**

# **Two children mount**

App renders a Header and a Footer. Both are set up before either is mounted.

**What happens**The page loads. App renders \<Header /> then \<Footer />.

**App.vue **

**Header.vue **

**Footer.vue **

```
<!-- App.vue -->
<Header />
<Footer />
```

**Deck · tap a card to add it, or drag it into place**

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**Timeline · first to last**

1. **1** Next card

**Game finished**

## **You finished Lifecycle Line-up**

All 7 levels done. Two more games are waiting for you.

- [**Preview****1****re-rendered****+1****Prediction game****Reactivity Radar**Will the template update? Call it before Vue does.0 of 3 levels done**Start playing**](https://vuejs.school/games/radar)
- [1\<template>2\<button@click="add">3 {{ count.value }}**bug**4\</button>5\</template>**Spot the bug****Bug Hunt**Find the broken line, then pick the fix.0 of 3 levels done**Start playing**](https://vuejs.school/games/bug-hunt)

[**All games**](https://vuejs.school/games) [**Play again from level 1**](https://vuejs.school/games/lifecycle/1)

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