> For the complete documentation index, see [llms.txt](https://0xpolygon.gitbook.io/dapp-launchpad/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://0xpolygon.gitbook.io/dapp-launchpad/commands/dev.md).

# dev

<pre><code><strong>dapp-launchpad dev [options]
</strong></code></pre>

The `dev` command starts a local dev environment - a local blockchain (Hardhat) and a local FE (Next.js) server.

## Options

| Option                                 | Description                                                                                                                                                                                                      |
| -------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `-n, --fork-network-name [NAME]`       | Name of the network to fork; optional. By default, it starts a new chain from genesis block. (choices: "ethereum", "goerli", "polygonPos", "polygonMumbai", "polygonZkevm", "polygonZkevmTestnet")               |
| `-b, --fork-block-num [number]`        | Block number to fork at. By default, it's the latest block.                                                                                                                                                      |
| `-r, --reset-on-change`                | Resets the entire local blockchain when any code is changed; for forked mode, it resets back to forked block number; NOT DEFAULT.                                                                                |
| `--only-smart-contracts`               | Deploys only smart contracts (having started local test chain) and updates Smart contract configs for frontend; does not start frontend dev environment.                                                         |
| `--only-frontend`                      | Deploys only frontend (having started local server); does not start local blockchain. Smart contracts data is read from pre-existing configs. To generate these manually, use `generate smart-contracts-config`. |
| `-e, --enable-explorer`                | Sets up a chain explorer for the local test blockchain started; NOT DEFAULT; sign up at <https://app.tryethernal.com/>.                                                                                          |
| `--ethernal-login-email [EMAIL]`       | Ethernal login email; needed only if `--explorer` is enabled. This overrides env variable `ETHERNAL_EMAIL` if present.                                                                                           |
| `--ethernal-login-password [PASSWORD]` | Ethernal login password; needed only if `--explorer` is enabled. This overrides env variable `ETHERNAL_PASSWORD` if present.                                                                                     |
| `--ethernal-workspace [WORKSPACE]`     | Ethernal workspace name; needed only if `--explorer` is enabled. This overrides env variable `ETHERNAL_WORKSPACE` if present.                                                                                    |
| `-h, --help`                           | Display help for command                                                                                                                                                                                         |

## Help

To get help, run:

```
dapp-launchpad dev -h
```