如下代码,EventSource会把单词的前置空格吃掉，比如“ blank” 会变成"blank",这会导致输出的英语单词连在一起

const eventSource = new EventSource(api_question);
eventSource.onmessage = streamEvent => {const data = streamEvent.data;handleTest(data);};

临时解决方案，将后端的数据包装成json,前端再解析出来。

eventSource.onmessage = streamEvent => {const data = JSON.parse(streamEvent.data);resText += data.val;handleTest(resText);};