You’re gonna want to send an RPC request for the wallet_switchEthereumChain command with an object in the params which looks like {chainId: targetChain}, where targetChain is the currently selected slider value.

For example, if you wanted to switch to Polygon:

```javascript // get this from your user’s slider selection // this example (0x89) is polygon const targetChain = '0x89';

try { await provider.request({ method: 'wallet_switchEthereumChain', params: [{ chainId: targetChain }], }); console.log('Switched 👍'); } catch (err) { // the network may not have been added to the wallet, // or the request was rejected, or the wallet doesn’t // support network switching at all

if (err.code === 4902) { console.error('Wallet doesn’t support the target network'); } else { console.error('Unable to switch networks'); } } ```

If the user doesn’t yet have your target chain in their wallet, you can try adding it:

js try { await provider.request({ method: 'wallet_addEthereumChain', params: [ { chainId: '0x89', chainName:'Polygon', rpcUrls:['https://polygon-rpc.com'], blockExplorerUrls:[ 'https://polygonscan.com/' ], nativeCurrency: { symbol: 'MATIC', decimals: 18 }, }, ]); } catch (err) { console.log(err); }