vue中动态控制btn的disabled属性方式

<button class="iconDivIcon targetBtn" :class="isdisabled?btndisabled:''"  style="width:100px;" @click="changeEnables(0)" :disabled="isdisabledFn">禁用</button>  
<div id="app"><button :disabled="isdisabledFn">测试</button><div>    

var app=new Vue({undefined
        el:"#app",
        data:{undefined
                isDisabl:true
        },
        computed:{undefined
                isdisabledFn(){undefined
                    if(后台传过来的数据!=null){undefined
                            return this.isdisabled=false;
                    }else{undefined
                            return this.isdisabled=true;
                    }
                }
        }
})

<date-picker v-model="time1" valueType="format"
                     ref="userBirthdayInput"
                     id="userBirthday"
                     :disabled="disabled"
                     placeholder="请输入生日"></date-picker>

export default {
    name: "ModifyUserInfo",
    props: {
      disabled: {
        default: false
      }
    },
    data() {
      return {
        time1: null,
        loading: false,
        userPhoto: "",
      }
    }
    }

this.disabled = true