> For the complete documentation index, see [llms.txt](https://dev.teaproject.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dev.teaproject.org/020_tutorial/020_hello_world/024_sample_front_end_code_walkthrough.md).

# Sample Front-end Code Walkthrough

The `master` branch of the tutorial is just a simple "hello world" example. There's not much front-end logic to explain. In contrast, the `login` branch is a **typical** TApp boilerplate. We'll dig into more detail on the `login` branch when we get there in our next step.

For the current `master` branch, you can see a typical VUE front-end Single Page Application.

> Note: You can use any front end framework to build your own front end. TEA Project is not a front end framework, it works with any type of front end framework. We use VUE as an easy example.

The only hello world related code is in `Home.vue`

This is the code:

```
import {_, axios} from 'tearust_utils';
export default {
  data(){
    return {};
  },
  methods: {
    get_env(key) {
      const x_key = 'VUE_APP_' + _.toUpper(key);
      return _.get(process.env, x_key, null);
    },
    async send_request(){
      const _axios = axios.create({
        baseURL: this.get_env('LAYER2_URL'),
      });
      const rs = await _axios.post('/say-hello', {
        actor: 'someone.sample',
        address: '0x000000000000000000000000000000000000000f'
      });
      alert(rs.data);
    }
  }
};
```

It simply sends an axios post to `/say-hello` with the following JSON content:

```
{
    actor: 'someone.sample',
    address: '0x000000000000000000000000000000000000000f'
}
```

This is an example of how we test the sample-actor using CURL or Postman.

Another thing we need to mention is the LAYER2\_URL env var. This is the address to the [backend actor](/z_glossary/back_end_actor.md). It's defined in the `.env.test` file. During you local testing, by default it is set to your local IP address port 8000.

```
NODE_ENV = dev
VUE_APP_LAYER2_URL=http://127.0.0.1:8000
```

If you have a special environment settings that the backend is not running on 127.0.0.1:8000, please make sure you change this value.


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