Why do listeners also have to block/wait for each other?

[ak99372]

Having emitter wait for all subscribers/listeners is quite useful however, I don't see a reason why multiple listeners have to block each other and executed in sequence (they should run independently). The listeners should run in parallel (i.e. Promise.all(listeners)). (E.g. code below shows C being blocked until B is finished)

const AwaitEventEmitter = require('await-event-emitter').default

const emitter = new AwaitEventEmitter()
const tick = (name,args,time) =>
  new Promise((resolve) => {
    setTimeout(() => {
      console.log(`${name} -${args}`);
      resolve()
    }, time || 1000)
  })

emitter.on('event', async (args) => {  await tick('A',args) });
emitter.on('event', async (args) => {  await tick('B',args,4000) });
emitter.on('event', async (args) => {  await tick('C',args) });

async function run() {
  await emitter.emit('event', 'one')
  await emitter.emit('event', 'two')
  emitter.emitSync('event', 'three')
}
run();

[imcuttle]

Hi, @ak99372 node-await-event-emitter is just implements the series processing, If you need parallel case, Please use the package tapable which is used by webpack.