async await的注意事项

    async function biaobai(god) {
     
      setTimeout(() => {
        
      }, 500);
  
    }

    async function biaobai(god) {
      return new Promise((resolve, reject)=>{
      setTimeout(() => {
        resolve()
      }, 500);
       })
    }

    function biaobai() {
      return new Promise((resolve)=>{
        setTimeout(() => {
        }, 500);
        resolve(undefined) 
      })
    }