emitter[Symbol.for('nodejs.rejection')](err, eventName[, ...args])


    Symbol.for('nodejs.rejection') 方法被调用,以防在触发事件时发生 promise 拒绝,并且在触发器上启用了 captureRejections。 可以使用 events.captureRejectionSymbol 代替 Symbol.for('nodejs.rejection')

    The Symbol.for('nodejs.rejection') method is called in case a promise rejection happens when emitting an event and captureRejections is enabled on the emitter. It is possible to use events.captureRejectionSymbol in place of Symbol.for('nodejs.rejection').

    import { EventEmitter, captureRejectionSymbol } from 'node:events';
    
    class MyClass extends EventEmitter {
      constructor() {
        super({ captureRejections: true });
      }
    
      [captureRejectionSymbol](err, event, ...args) {
        console.log('rejection happened for', event, 'with', err, ...args);
        this.destroy(err);
      }
    
      destroy(err) {
        // Tear the resource down here.
      }
    }const { EventEmitter, captureRejectionSymbol } = require('node:events');
    
    class MyClass extends EventEmitter {
      constructor() {
        super({ captureRejections: true });
      }
    
      [captureRejectionSymbol](err, event, ...args) {
        console.log('rejection happened for', event, 'with', err, ...args);
        this.destroy(err);
      }
    
      destroy(err) {
        // Tear the resource down here.
      }
    }