listen-on-network-changed-from-remix.js

// Right click on the script name and hit "Run" to execute
(async () => {
    try {       

        const providerPlugin = {
            sendAsync(payload, callback) {
                window.remix.call('web3Provider', 'sendAsync', payload)
                .then(result => callback(null, result))
                .catch(e => callback(e))
            }
        }
    
        let provider = new ethers.providers.Web3Provider(providerPlugin, "any");
        let network = await provider.getNetwork()
        
        console.log('current network ' + network.chainId)
        provider.on("network", async (newNetwork, oldNetwork) => {        
            console.log('new' + JSON.stringify(newNetwork))
            console.log('old' + JSON.stringify(oldNetwork))
            provider = new ethers.providers.Web3Provider(providerPlugin, "any");
            network = await provider.getNetwork()
        });

        setInterval(() => {
            console.log('current network ' + network.chainId)
        }, 500)
       
    } catch (e) {
        console.log(e.message)
    }
})()