事件循环在node新老版本中执行顺序


console.log('1','1');

setTimeout(function() {
  console.log('2','5');
  process.nextTick(function() {
    console.log('3','7');
  });
  new Promise(function(resolve) {
    console.log('4','6');
    resolve();
  }).then(function() {
    console.log('5','8');
  });
}); 

process.nextTick(function() {
  console.log('6','3');
});

new Promise(function(resolve) {
  console.log('7','2');
  resolve();
}).then(function() {
  console.log('8','4');
});

setTimeout(function() {
  console.log('9','9');
  process.nextTick(function() {
    console.log('10','11');
  }) 
  new Promise(function(resolve) {
    console.log('11','10');
    resolve();
  }).then(function() {
    console.log('12','12')
  });
})

事件循环在node新老版本中执行顺序

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