Sets or gets the default captureRejection value for all emitters.
This symbol shall be used to install a listener for only monitoring 'error'
events. Listeners installed using this symbol are called before the regular
'error'
listeners are called.
Installing a listener using this symbol does not change the behavior once an
'error'
event is emitted, therefore the process will still crash if no
regular 'error'
listener is installed.
Returns a list listener for a specific emitter event name.
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如果是字符串,以 ws:// 或者 wss:// 开头的会使用 websocket,如果是32位的 会尝试用 chrome