异步改同步

var obj = { name: '123' }
function testAwait(){
    obj.name = '789'
   return new Promise((resolve) => {
       setTimeout(function(){
          console.log("testAwait", obj.name);
          resolve();
       }, 1000);
   });
}
 
async function helloAsync(){
   await testAwait();
    obj.name = '456'
   console.log("helloAsync", obj.name);
 }
helloAsync();