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docs/ccxt/examples/ccxt.pro/js/one-exchange-many-streams.js

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+'use strict';
+
+const ccxt = require ('ccxt');
+
+(async () => {
+
+     const exchange = new ccxt.pro.binance ({ enableRateLimit: true })
+    const symbols = [ 'BTC/USDT', 'ETH/BTC', 'ETH/USDT' ]
+
+    await Promise.all (symbols.map (symbol =>
+
+        (async () => {
+
+            while (true) {
+                try {
+                    const orderbook = await exchange.watchOrderBook (symbol)
+                    console.log (new Date (), symbol, orderbook['asks'][0], orderbook['bids'][0])
+                } catch (e) {
+                    console.log (symbol, e)
+                    // do nothing and retry on next loop iteration
+                    // throw e // uncomment to break all loops in case of an error in any one of them
+                    // break // you can also break just this one loop if it fails
+                }
+            }
+
+        }) ())
+    )
+}) ()