eth_syncing

Returns an object with data about the sync status or false

web3.eth.isSyncing([callback])

Returns

A sync object when the node is currently syncing or false:

• startingBlock - Number: The block number where the sync started.

• currentBlock - Number: The block number where the node is currently synced to.

• highestBlock - Number: The estimated block number to sync to.

• knownStates - Number: The number of estimated states to download.

• pulledStates - Number: The number of already downloaded states.

Example

> web3.eth.isSyncing().then(console.log)
> false