async await使用报错

Question

unknown: Unexpected reserved word 'await'
这个是为什么？
我这个async await写的还有哪里不合理吗

getImageInfo(url){
    return new Promise((resolve,reject)=>{
        wx.getImageInfo({
            src: url,
            success (res) {
              resolve(res.path)
            }
        })
    })
},
    
async getTmp(url){
    let arr = []
    url.map(res=>{
        await this.getImageInfo(res).then(res2=>{  //这行报错
            arr.push(res2)
        })
    })
},

Answer 1

可以试试：

1:
async getTmp(url){
    let arr = []
    for (const item of url) {
        let res2 = await this.getImageInfo(res);
        arr.push(res2)
    }
}

2:
async getTmp(url){
    let arr = []
    await Promise.all(url.map(async (res)=>{
        let res2 = await this.getImageInfo(res);
        arr.push(res2)
    }));
}

Answer 2

async位置错了

getTmp(url){
    let arr = []
    url.map(async res => {
        await this.getImageInfo(res).then(res2=>{  //这行报错
            arr.push(res2)
        })
    })
}