koa2 get请求后台正常接收参数 前端报404错误

function del(mId){
        $.ajax({
            type:"get",
            url:"/delUser",
            data:{id:mId},
            success:function(data){
                console.log(‘成功了‘);
                console.log(data);
            }
        });
    }

router.get(‘/delUser‘,async (ctx,next)=>{
    console.log(‘接收请求‘);
    console.log(ctx.request.query);
})

router.get(‘/delUser‘,async (ctx,next)=>{
    console.log(‘接收请求‘);
    console.log(ctx.request.query);
    ctx.body="这是给前端的回应"; 
})