SOURCE

async function onLoad() {
  try {
    var a = await getUserInfoAsync(1);
    var b = await getUserInfoAsync(2);
    
    console.log(a,b);
    console.log('结束');
    
  } catch (error) {
    console.error('出错:', error)
  }
};

// 封装方法
function getUserInfoAsync( aa ) {
  return new Promise((resolve, reject) => {
      if( aa==1 ){
        resolve('1111111');
      }
      else if(aa==2){
        resolve('2222222');
      } else{
       reject('3333333');
      }
  })
};

onLoad();