JSON object values cannot be accessed using key names in JS

Question

i am trying to get data from Binance web sockets in my react app

const ws = new WebSocket("wss://stream.binance.com:9443/ws/ethbtc@trade");
ws.onopen = () => {
  ws.send(
    JSON.stringify({
      method: "SUBSCRIBE",
      params: ["ethbtc@trade"],
      id: 13
    })
  );
};
ws.onmessage = evnt => {
  console.log(evnt.data);
};

and the response is {"e":"trade","E":1593865856744,"s":"ETHBTC","t":180904813,"p":"0.02493100","q":"0.90600000","b":788853315,"a":788853661,"T":1593865856743,"m":true,"M":true}

but when trying to get a specific value from the above object it shows undefined !

console.log(evnt.data.s)

it shows undefined

if anyone can help it will be great, Thanks in advance!

maybe the response data is String. If it is string, you need to parse before accessing it — Quang Thái
– Quang Thái, Commented Jul 4, 2020 at 12:42

Talha Noyon · Accepted Answer · 2020-07-04 12:43:57Z

1

please try like this

console.log(evnt.data["s"]) Or,
console.log(JSON.parse(evnt.data).s) Or,
console.log(evnt.data.toObject().s)

answered Jul 4, 2020 at 12:43

Talha Noyon

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5 Comments

Crypto Man Over a year ago

Thank You console.log(JSON.parse(evnt.data).s) the second one works for me !

Talha Noyon Over a year ago

It's my pleasure. can you please knock me here? link: facebook.com/talha.aiubian

Crypto Man Over a year ago

i stopped using fb :-(..no more account !

Talha Noyon Over a year ago

How can I contact with you?

Crypto Man Over a year ago

linkedin.com/in/aashiqotp/ or instagram : @Aashiq_Otp

Sourabh Lakhotiya · Accepted Answer · 2020-07-04 12:44:51Z

1

try this may be it solves your problem

JSON.parse(event.data).s

answered Jul 4, 2020 at 12:44

Sourabh Lakhotiya

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