web3 (then property) in ethereum node

Question

Would you please help: When I run the below command in my nodejs console I get the below error: (I am using web3 0.20.0) on Windows 10

web3.eth.getAccounts().then(list => {accts = list})


TypeError: Cannot read property 'then' of undefined
> TypeError: callback is not a function
at c:\Users\Salam Khanji\Ether\node_modules\web3\lib\web3\property.js:119:13
at c:\Users\Salam 
Khanji\Ether\node_modules\web3\lib\web3\requestmanager.js:89:9
at XMLHttpRequest.request.onreadystatechange (c:\Users\Salam 
Khanji\Ether\node_modules\web3\lib\web3\httpprovider.js:119:7)
at XMLHttpRequestEventTarget.dispatchEvent (c:\Users\Salam 
Khanji\Ether\node_modules\web3\node_modules\xhr2\lib\xhr2.js:64:18)
at XMLHttpRequest._setReadyState (c:\Users\Salam 
Khanji\Ether\node_modules\web3\node_modules\xhr2\lib\xhr2.js:354:12)
at XMLHttpRequest._onHttpResponseEnd (c:\Users\Salam 
Khanji\Ether\node_modules\web3\node_modules\xhr2\lib\xhr2.js:509:12)

Answer 1

What version of web3 do you use ?

Note that getAccounts() has been implemented only in the betas of 1.0.0. If you're using the version up to 0.20.0 the method does not exists and web3.eth.accounts will only retrieve an plain array.

Answer 2

From the documentation:

var accounts = web3.eth.accounts;
console.log(accounts); // ["0x407d73d8a49eeb85d32cf465507dd71d507100c1"] 

You can use the Promise version only from 1.0