1 async 和 await 的概念，建议看这一篇文章https://www.cnblogs.com/SamWeb/p/8417940.html

我遇到的是在vue element组件里面的，原来的写法是这样的，组件表单校验成功后（createProjectConfirm函数里），先新增一条记录，再刷新列表（handleResult）

handleResult (res) {        if (res.state !== 0) {          this.$message({            message: res.message,            type: 'warning'          });        } else {          this.$message({            message: res.message,            type: 'success'          });          this.$refs['projectForm'].resetFields();          this.dialogFormVisible = false;          this.getProjectList(1);        }      },      createProjectConfirm () {        this.$refs['projectForm'].validate((valid) = {          if (valid) {            let param = {              projectName: this.projectForm.projectName,              projectDescription: this.projectForm.projectDescription            };            this.$post('/api/project', param).then(res = {              this.handleResult(res);            });

2 后来尝试了下async 和 await，这样是可以成功的

      createProjectTest() {       let param = {              projectName: this.projectForm.projectName,              projectDescription: this.projectForm.projectDescription            };       return this.$post('/api/project', param).then(res = {          return res;        });      },       createProjectConfirm () {        this.$refs['projectForm'].validate( async (valid) ={            if(valid) {                let res = await this.createProjectTest();                console.log(res);                if(res.state !== 0) {                  this.$message({                          message: res.message,                          type: 'warning'                        });                } else{                  this.$message({                          message: res.message,                          type: 'success'                        });                        this.$refs['projectForm'].resetFields();                        this.dialogFormVisible = false;                        this.getProjectList(1);                }            }        })

之前报错await is a reserved word，是因为错把async放到createProjectTest上，这里async和await是成对出现的，所以应该放在匿名函数的位置，加async的函数会被await阻塞，await会跳出async让出线程，所以说学一个东西是一回事，会用一个东西是另外一回事。。自勉下