stompServer.send will lose the last 10 characters

[yangdan8]

The following code will lose the 10 characters "0123456789":
var topic ='xxx'; var data = {a:5}; stompServer.send( topic, {}, JSON.stringify({ topic, data, }) + '0123456789', );

[alexhalf]

try to use for third argument Buffer.from(JSON.stringify({ topic, data, }) + '0123456789', 'utf-8').